diff --git a/2018/09/asg-container_runtimes/container-runtimes.pdf b/2018/09/asg-container_runtimes/container-runtimes.pdf new file mode 100644 index 0000000..7ad6b35 Binary files /dev/null and b/2018/09/asg-container_runtimes/container-runtimes.pdf differ diff --git a/2018/09/asg-container_runtimes/container-runtimes/0c750f65e1f4c6b7362abbc9c5963392.png b/2018/09/asg-container_runtimes/container-runtimes/0c750f65e1f4c6b7362abbc9c5963392.png new file mode 100644 index 0000000..84aae77 Binary files /dev/null and b/2018/09/asg-container_runtimes/container-runtimes/0c750f65e1f4c6b7362abbc9c5963392.png differ diff --git a/2018/09/asg-container_runtimes/container-runtimes/339e84e5deca8af62480a1dc3fb7af96.gif b/2018/09/asg-container_runtimes/container-runtimes/339e84e5deca8af62480a1dc3fb7af96.gif new file mode 120000 index 0000000..97e7e94 --- /dev/null +++ b/2018/09/asg-container_runtimes/container-runtimes/339e84e5deca8af62480a1dc3fb7af96.gif @@ -0,0 +1 @@ +../../../../2016/05-Container_past_present_future-coreosfest-de/containers-past-present-and-future/339e84e5deca8af62480a1dc3fb7af96.gif \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/container-runtimes/41bdbfee7c1333d20604b26b7ed5087c.gif b/2018/09/asg-container_runtimes/container-runtimes/41bdbfee7c1333d20604b26b7ed5087c.gif new file mode 120000 index 0000000..61f584c --- /dev/null +++ b/2018/09/asg-container_runtimes/container-runtimes/41bdbfee7c1333d20604b26b7ed5087c.gif @@ -0,0 +1 @@ +../../../../2016/09-Common_container_standards_past_presnt_and_future-ContainerCon.eu/containers-past-present-and-future-3-6-7/41bdbfee7c1333d20604b26b7ed5087c.gif \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/container-runtimes/5e1a7c37f8b075137176a16db5edc490.svg b/2018/09/asg-container_runtimes/container-runtimes/5e1a7c37f8b075137176a16db5edc490.svg new file mode 120000 index 0000000..003e81d --- /dev/null +++ b/2018/09/asg-container_runtimes/container-runtimes/5e1a7c37f8b075137176a16db5edc490.svg @@ -0,0 +1 @@ +../../../../2016/05-Container_past_present_future-coreosfest-de/containers-past-present-and-future/5e1a7c37f8b075137176a16db5edc490.svg \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/container-runtimes/60672f0849c5b758b11dc0905dc42c02.svg b/2018/09/asg-container_runtimes/container-runtimes/60672f0849c5b758b11dc0905dc42c02.svg new file mode 120000 index 0000000..472a4c3 --- /dev/null +++ b/2018/09/asg-container_runtimes/container-runtimes/60672f0849c5b758b11dc0905dc42c02.svg @@ -0,0 +1 @@ +../../../../2016/05-Container_past_present_future-coreosfest-de/containers-past-present-and-future/60672f0849c5b758b11dc0905dc42c02.svg \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/container-runtimes/798496c4607c11d48ebc0056daad3a57.png b/2018/09/asg-container_runtimes/container-runtimes/798496c4607c11d48ebc0056daad3a57.png new file mode 120000 index 0000000..761755a --- /dev/null +++ b/2018/09/asg-container_runtimes/container-runtimes/798496c4607c11d48ebc0056daad3a57.png @@ -0,0 +1 @@ +../../../../2017/03-state_of_container_ecosystem_oci_pov/containers-standards-on-the-horizon-12/798496c4607c11d48ebc0056daad3a57.png \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/index.html b/2018/09/asg-container_runtimes/index.html new file mode 100644 index 0000000..5a13847 --- /dev/null +++ b/2018/09/asg-container_runtimes/index.html @@ -0,0 +1,2458 @@ + + + + + + + Container Runtimes (ASG 2018) + + + + + + + + + + + + + +
+
+
+ + +
+

CONTAINer Runtimes

+ +

Draw Some Lines

+ +

 

+ +

 

+ +

bit.ly/asg2018-vbatts-CR

+ +

 

+ +

Vincent Batts @vbatts

+
+
+
+
$> finger $(whoami)
+Login: vbatts                           Name: Vincent Batts
+Directory: /home/vbatts                 Shell: /bin/bash
+Such mail.
+Plan:
+OHMAN
+$> id -Gn
+devel opencontainers docker appc redhat golang slackware
+
+

Containers

+
+ + + + + + + + + + + + +
+
+

(Cite: the internet)

+
+
+

Containers

+
+ + + + + + + + + + + + +
+
+

(Cite: The Internet)

+
+
+

Container Runtimes

+
+ + + + + + + + + + + + + +
+

chroot + unshare (mnt ns) + cgroups

+
+
+

a history

+
+
+

LXC

+ + +
+
+

systemd-nspawn

+ + +
+
+

Container Runtimes

+
+ + + + + + + + + + + + + + +
+

a history

+
+ +
+

Docker

+ +
    +
  • all the things
    • +
  • 2013 python script became golang
    • +
  • (not a single good link to the source)
    • +
+
+
+

lmctfy

+ +
    +
  • 2013
    • +
  • academic offering
    • +
  • dead, but still a good example of form over function
    • +
+
+
+

rkt

+ +
    +
  • Dec 2014
    • +
  • spec-first design (appC spec)
    • +
+
+
+

Container Runtimes

+
+ + + + + + + + + + + + + + +
+

a history

+
+ +
+

libcontainer (now runc)

+ +
    +
  • 2014
    • +
  • to have something golang native, rather than shell-out to lxc
    • +
  • (eventually meant more shelling-out)
    • +
  • the original OCI runtime
    • +
+
+
+

  lxd

+ +
    +
  • 2014
    • +
  • container manager built on lxc
    • +
  • (came after Docker made asks of lxc, then abandoned it for libcontainer)
    • +
+
+
+

libct

+ +
    +
  • from odis/openVZ folks
    • +
  • C library of container helpers (not docker or lxc related)
    • +
+
+
+

Container Runtimes

+
+ + + + + + + + + + + + + + +
+

a history

+
+ +
+

OCI Specification

+ + +
+
+

Container Runtime Interface

+
+ + + + + + + + + + + + + + + + +
+

Kubernetes

+ +
    +
  • 2014
    • +
  • was (is?) entirely too docker-centric
    • +
  • with rkt it was clear there were big changes needed
    • +
  • Enter CRI (2016) +
      +
    • gRPC interface for ImageService and RuntimeService
      • +
    +
    • +
+
+
+

migration via dockershim

+ +
    +
  • completely switched to docker via CRI in v1.8
    • +
+
+
+
+

(source)

+
+
+

Container Runtime Interface

+
+ + + + + + + + + + + + + + + + +
+

cri-o (originally oci-d)

+ +
    +
  • kubernetes only use-case
    • +
  • OCI images and runtime
    • +
  • primarily called runc, but is flexible to call other runtimes
    • +
+
+
+

containerd

+ +
    +
  • primarily docker use-case, but includes a CRI shim
    • +
  • OCI and Docker images
    • +
+
+
+

alibaba/pouch

+ +
    +
  • swiss arm knife of sorts
    • +
  • uses kvm pieces
    • +
  • supports 2.6.32+ kernel
    • +
  • imports from runc, docker, p2p backend, and expose a CRI socket
    • +
+
+
+

Container Runtime Interface

+
+ + + + + + + + + + + + + + + + +
+

cri-tools

+ +
    +
  • `crictl`
    • +
  • the cli for working or debugging directly with CRI layer
    • +
+
+ + + + + + + + + + + + + + +
+

OCI RUNTIMES

+
+
+

oracle/railcar

+ +
    +
  • 2017
    • +
  • an OCI runtime
    • +
  • written in rust
    • +
+
+
+

kata-containers (formerly clear containers and hyperV)

+ +
    +
  • mixed years
    • +
  • an OCI runtime
    • +
  • thinVM (qemu with custom machine type)
    • +
+
+
+

nabla-containers (IBM research)

+ +
    +
  • has an OCI runtime
    • +
  • unikernel approach
    • +
  • requires tailored container images with their executor
    • +
+
+ + + + + + + + + + + + + + +
+

OCI RUNTIMES

+
+
+

nvidia fork of runc

+ +
    +
  • inherently an OCI runtime
    • +
  • exposes GPU specific configuration
    • +
+
+
+

google/gvisor (`runsc`)

+ +
    +
  • has an OCI runtime
    • +
  • syscall emulation layer
    • +
  • uses a bit of kvm
    • +
  • feels a bit like thrown over the wall
    • +
+
+
+

windows/hcsshim (`runhcs`)

+ +
    +
  • has an OCI runtime
    • +
  • windows native container API
    • +
+
+ + + + + + + + + + + + + + +
+

OCI RUNTIMES

+
+
+ +
+
+

systemd-nspawn native support (pr9762)

+ +
    +
  • preferable than wrapper
    • +
  • still has a couple of pieces missing like hooks and compatible cli
    • +
+
+ + + + + + + + + + + + + + +
+

non-docker options

+
+
+

podman

+ +
    +
  • easy alias for `docker`
    • +
  • direct invocation
    • +
  • now supports non-root
    • +
+
+
+

buildah

+ +
    +
  • drop-in for `docker build`, as well as shell subcommands
    • +
  • direct invocation
    • +
  • now supports non-root builds
    • +
+
+
+

umoci

+ +
    +
  • utility for working with OCI container images
    • +
  • unpack, modify, repack
    • +
+
+
+

skopeo

+ +
    +
  • initially just remote inspect images
    • +
  • now copies (local <=> remote) and translates formats
    • +
+
+

github.com/vbatts/talks

+ +

Thanks!

+
+
+

Vincent Batts

+ +

@vbatts| vbatts@redhat.com

+
+
+
+ + + + + + + + + + + + + + + diff --git a/2018/09/asg-container_runtimes/lib/fonts/asul/asul-bold.ttf b/2018/09/asg-container_runtimes/lib/fonts/asul/asul-bold.ttf new file mode 120000 index 0000000..06b62f5 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/asul/asul-bold.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/asul/asul-bold.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/asul/asul-bold.woff b/2018/09/asg-container_runtimes/lib/fonts/asul/asul-bold.woff new file mode 120000 index 0000000..bae2cd5 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/asul/asul-bold.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/asul/asul-bold.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/asul/asul-regular.ttf b/2018/09/asg-container_runtimes/lib/fonts/asul/asul-regular.ttf new file mode 120000 index 0000000..dd23474 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/asul/asul-regular.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/asul/asul-regular.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/asul/asul-regular.woff b/2018/09/asg-container_runtimes/lib/fonts/asul/asul-regular.woff new file mode 120000 index 0000000..689e42b --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/asul/asul-regular.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/asul/asul-regular.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/asul/asul.css b/2018/09/asg-container_runtimes/lib/fonts/asul/asul.css new file mode 120000 index 0000000..3942e79 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/asul/asul.css @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/asul/asul.css \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-bold.ttf b/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-bold.ttf new file mode 120000 index 0000000..494976e --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-bold.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/cabinsketch/cabinsketch-bold.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-bold.woff b/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-bold.woff new file mode 120000 index 0000000..6f17ef8 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-bold.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/cabinsketch/cabinsketch-bold.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-regular.ttf b/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-regular.ttf new file mode 120000 index 0000000..907888e --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-regular.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/cabinsketch/cabinsketch-regular.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-regular.woff b/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-regular.woff new file mode 120000 index 0000000..8ee8dc3 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch-regular.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/cabinsketch/cabinsketch-regular.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch.css b/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch.css new file mode 120000 index 0000000..670e933 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/cabinsketch/cabinsketch.css @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/cabinsketch/cabinsketch.css \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bold.ttf b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bold.ttf new file mode 120000 index 0000000..bf73faf --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bold.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/josefinsans/josefinsans-bold.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bold.woff b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bold.woff new file mode 120000 index 0000000..1c5df3b --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bold.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/josefinsans/josefinsans-bold.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bolditalic.ttf b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bolditalic.ttf new file mode 120000 index 0000000..83476a4 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bolditalic.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/josefinsans/josefinsans-bolditalic.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bolditalic.woff b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bolditalic.woff new file mode 120000 index 0000000..502c11a --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-bolditalic.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/josefinsans/josefinsans-bolditalic.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-italic.ttf b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-italic.ttf new file mode 120000 index 0000000..a94fef4 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-italic.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/josefinsans/josefinsans-italic.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-italic.woff b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-italic.woff new file mode 120000 index 0000000..47ce5e7 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-italic.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/josefinsans/josefinsans-italic.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-regular.ttf b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-regular.ttf new file mode 120000 index 0000000..b8cc91a --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-regular.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/josefinsans/josefinsans-regular.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-regular.woff b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-regular.woff new file mode 120000 index 0000000..5ef9a99 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans-regular.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/josefinsans/josefinsans-regular.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans.css b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans.css new file mode 120000 index 0000000..8130bf9 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/josefinsans/josefinsans.css @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/josefinsans/josefinsans.css \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_AMS-Regular.ttf b/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_AMS-Regular.ttf new file mode 120000 index 0000000..9636468 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_AMS-Regular.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/katex/KaTeX_AMS-Regular.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_AMS-Regular.woff b/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_AMS-Regular.woff new file mode 120000 index 0000000..640fb80 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_AMS-Regular.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/katex/KaTeX_AMS-Regular.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_Caligraphic-Bold.ttf b/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_Caligraphic-Bold.ttf new file mode 120000 index 0000000..df5a45e --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_Caligraphic-Bold.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/katex/KaTeX_Caligraphic-Bold.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_Caligraphic-Bold.woff b/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_Caligraphic-Bold.woff new file mode 120000 index 0000000..53a0a6c --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/katex/KaTeX_Caligraphic-Bold.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/katex/KaTeX_Caligraphic-Bold.woff \ No newline at end of file diff --git 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120000 index 0000000..5592a8e --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/lato/lato-italic.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/lato/lato-italic.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/lato/lato-italic.woff b/2018/09/asg-container_runtimes/lib/fonts/lato/lato-italic.woff new file mode 120000 index 0000000..2bec5c5 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/lato/lato-italic.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/lato/lato-italic.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/lato/lato-regular.ttf b/2018/09/asg-container_runtimes/lib/fonts/lato/lato-regular.ttf new file mode 120000 index 0000000..409dfac --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/lato/lato-regular.ttf @@ -0,0 +1 @@ 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b/2018/09/asg-container_runtimes/lib/fonts/montserrat/montserrat-bold.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/montserrat/montserrat-bold.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/montserrat/montserrat-regular.ttf b/2018/09/asg-container_runtimes/lib/fonts/montserrat/montserrat-regular.ttf new file mode 120000 index 0000000..f59263c --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/montserrat/montserrat-regular.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/montserrat/montserrat-regular.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/montserrat/montserrat-regular.woff b/2018/09/asg-container_runtimes/lib/fonts/montserrat/montserrat-regular.woff new file mode 120000 index 0000000..f6b9346 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/montserrat/montserrat-regular.woff @@ 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No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle-bold.woff b/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle-bold.woff new file mode 120000 index 0000000..824a867 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle-bold.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/newscycle/newscycle-bold.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle-regular.ttf b/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle-regular.ttf new file mode 120000 index 0000000..da42326 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle-regular.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/newscycle/newscycle-regular.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle-regular.woff b/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle-regular.woff new file mode 120000 index 0000000..1a1b00a --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle-regular.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/newscycle/newscycle-regular.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle.css b/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle.css new file mode 120000 index 0000000..b7a8b37 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/newscycle/newscycle.css @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/newscycle/newscycle.css \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/opensans/opensans-bold.ttf b/2018/09/asg-container_runtimes/lib/fonts/opensans/opensans-bold.ttf new file mode 120000 index 0000000..df6bfd1 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/opensans/opensans-bold.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/opensans/opensans-bold.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/opensans/opensans-bold.woff b/2018/09/asg-container_runtimes/lib/fonts/opensans/opensans-bold.woff new file mode 120000 index 0000000..c3f7ed6 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/opensans/opensans-bold.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/opensans/opensans-bold.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/opensans/opensans-bolditalic.ttf b/2018/09/asg-container_runtimes/lib/fonts/opensans/opensans-bolditalic.ttf new file mode 120000 index 0000000..f248786 --- 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diff --git a/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-bold.ttf b/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-bold.ttf new file mode 120000 index 0000000..eec4d6d --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-bold.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/overpass/overpass-bold.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-bold.woff b/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-bold.woff new file mode 120000 index 0000000..8d6124b --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-bold.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/overpass/overpass-bold.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-light.ttf b/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-light.ttf new file mode 120000 index 0000000..d522e10 --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-light.ttf @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/overpass/overpass-light.ttf \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-light.woff b/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-light.woff new file mode 120000 index 0000000..fafaf7f --- /dev/null +++ b/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-light.woff @@ -0,0 +1 @@ +../../../../../../2016/05-Container_past_present_future-coreosfest-de/lib/fonts/overpass/overpass-light.woff \ No newline at end of file diff --git a/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-regular.ttf b/2018/09/asg-container_runtimes/lib/fonts/overpass/overpass-regular.ttf new file mode 120000 index 0000000..1955de4 --- 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e,t=0;null!=(e=this[t]);t++){for(1===e.nodeType&&pe.cleanData(m(e,!1));e.firstChild;)e.removeChild(e.firstChild);e.options&&pe.nodeName(e,"select")&&(e.options.length=0)}return this},clone:function(e,t){return e=null!=e&&e,t=null==t?e:t,this.map(function(){return pe.clone(this,e,t)})},html:function(e){return je(this,function(e){var t=this[0]||{},n=0,r=this.length;if(void 0===e)return 1===t.nodeType?t.innerHTML.replace(Qe,""):void 0;if("string"==typeof e&&!nt.test(e)&&(he.htmlSerialize||!et.test(e))&&(he.leadingWhitespace||!Ue.test(e))&&!Ge[(qe.exec(e)||["",""])[1].toLowerCase()]){e=pe.htmlPrefilter(e);try{for(;nt",c.childNodes[0].style.borderCollapse="separate",t=c.getElementsByTagName("td"),t[0].style.cssText="margin:0;border:0;padding:0;display:none",o=0===t[0].offsetHeight,o&&(t[0].style.display="",t[1].style.display="none",o=0===t[0].offsetHeight)),h.removeChild(l)}var 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this.options.duration?this.pos=t=pe.easing[this.easing](e,this.options.duration*e,0,1,this.options.duration):this.pos=t=e,this.now=(this.end-this.start)*t+this.start,this.options.step&&this.options.step.call(this.elem,this.now,this),n&&n.set?n.set(this):B.propHooks._default.set(this),this}},B.prototype.init.prototype=B.prototype,B.propHooks={_default:{get:function(e){var t;return 1!==e.elem.nodeType||null!=e.elem[e.prop]&&null==e.elem.style[e.prop]?e.elem[e.prop]:(t=pe.css(e.elem,e.prop,""),t&&"auto"!==t?t:0)},set:function(e){pe.fx.step[e.prop]?pe.fx.step[e.prop](e):1!==e.elem.nodeType||null==e.elem.style[pe.cssProps[e.prop]]&&!pe.cssHooks[e.prop]?e.elem[e.prop]=e.now:pe.style(e.elem,e.prop,e.now+e.unit)}}},B.propHooks.scrollTop=B.propHooks.scrollLeft={set:function(e){e.elem.nodeType&&e.elem.parentNode&&(e.elem[e.prop]=e.now)}},pe.easing={linear:function(e){return e},swing:function(e){return.5-Math.cos(e*Math.PI)/2},_default:"swing"},pe.fx=B.prototype.init,pe.fx.step={};var Tt,Et,Mt=/^(?:toggle|show|hide)$/,_t=/queueHooks$/;pe.Animation=pe.extend(U,{tweeners:{"*":[function(e,t){var n=this.createTween(e,t);return d(n.elem,e,De.exec(t),n),n}]},tweener:function(e,t){pe.isFunction(e)?(t=e,e=["*"]):e=e.match(Ce);for(var n,r=0,i=e.length;r
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window),IS_PHONE:/iphone|ipod|android|windows\sphone/gi.test(navigator.userAgent),IS_TABLET:/ipad/gi.test(navigator.userAgent),isMac:function(){return/Mac/.test(navigator.platform)},isWindows:function(){return/Win/g.test(navigator.platform)},isLinux:function(){return/Linux/g.test(navigator.platform)},isIE:function(){return/MSIE\s[0-9]/gi.test(navigator.userAgent)||/Trident\/7.0;(.*)rv:\d\d/.test(navigator.userAgent)},isChrome:function(){return/chrome/gi.test(navigator.userAgent)},isSafari:function(){return/safari/gi.test(navigator.userAgent)&&!SL.util.device.isChrome()},isiPhone:function(){return/iphone|ipod/gi.test(navigator.userAgent)},isSafariDesktop:function(){return SL.util.device.isSafari()&&!SL.util.device.isChrome()&&!SL.util.device.IS_PHONE&&!SL.util.device.IS_TABLET},isOpera:function(){return!!window.opera},isFirefox:function(){return/firefox\/\d+\.?\d+/gi.test(navigator.userAgent)},isPhantomJS:function(){return/PhantomJS/gi.test(navigator.userAgent)},supportedByEditor:function(){return Modernizr.history&&Modernizr.csstransforms&&!SL.util.device.isOpera()},getScrollBarWidth:function(){var e=$("
").css({width:"100px",height:"100px",overflow:"scroll",position:"absolute",top:"-9999px"});e.appendTo(document.body);var t=e.prop("offsetWidth")-e.prop("clientWidth");return e.remove(),t}},SL.util.trig={distanceBetween:function(e,t){var n=e.x-t.x,r=e.y-t.y;return Math.sqrt(n*n+r*r)},intersection:function(e,t){return{x:Math.max(e.x,t.x),y:Math.max(e.y,t.y),width:Math.max(0,Math.min(e.x+e.width,t.x+t.width)-Math.max(e.x,t.x)),height:Math.max(0,Math.min(e.y+e.height,t.y+t.height)-Math.max(e.y,t.y))}},intersects:function(e,t,n,r){"undefined"==typeof n&&(n=0),"undefined"==typeof r&&(r=n);var i=SL.util.trig.intersection(e,t);return i.width>e.width*n&&i.height>e.height*r},isPointWithinRect:function(e,t,n){return e>n.x&&en.y&&t=0&&a<=1&&s>=0&&s<=1?{x:e.x+s*i.x,y:e.y+s*i.y}:null},rotateAround:function(e,t,n,r,i){return i=i*Math.PI/180,{x:(e-n)*Math.cos(i)-(t-r)*Math.sin(i)+n,y:(e-n)*Math.sin(i)+(t-r)*Math.cos(i)+r}}},SL.util.array={shuffle:function(e){for(var t=e.length-1;t>0;t--){var n=Math.floor(Math.random()*(t+1)),r=e[t];e[t]=e[n],e[n]=r}return e}},SL.util.string={URL_REGEX:/((https?\:\/\/)|(www\.)|(^\/\/))(\S+)(\w{2,4})(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/i,SCRIPT_TAG_REGEX:/)<[^<]*)*<\/script>/gi,VIMEO_ID_REGEX:/vimeo.com\/(\d+)/i,YOUTUBE_ID_REGEX:/youtube\.com\/watch\?v=([a-zA-Z0-9_-]+)/i,YOUTUBE_SHORT_ID_REGEX:/youtu\.be\/([a-zA-Z0-9_-]+)/i,VIMEO_EMBED_URL_REGEX:/player\.vimeo\.com\/video\/\d+/i,YOUTUBE_EMBED_URL_REGEX:/youtube\.com\/embed\/([a-zA-Z0-9_-]+)/i,VIMEO_EMBED_URL:"https://player.vimeo.com/video/{{VIDEO_ID}}",YOUTUBE_EMBED_URL:"https://www.youtube.com/embed/{{VIDEO_ID}}",uniqueIDCount:0,uniqueID:function(e){return SL.util.string.uniqueIDCount+=1,(e||"")+SL.util.string.uniqueIDCount+"-"+Date.now()},slug:function(e){return"string"==typeof e?(e=SL.util.string.trim(e),e=e.toLowerCase(),e=e.replace(/-/g," "),e=e.replace(/[^\w\s]/g,""),e=e.replace(/\s{2,}/g," "),e=e.replace(/\s/g,"-")):""},trim:function(e){return SL.util.string.trimRight(SL.util.string.trimLeft(e))},trimLeft:function(e){return"string"==typeof e?e.replace(/^\s+/,""):""},trimRight:function(e){return"string"==typeof e?e.replace(/\s+$/,""):""},linkify:function(e){return e&&(e=e.replace(/((https?\:\/\/)|(www\.))(\S+)(\w{2,4})(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/gi,function(e){var t=e;return t.match("^https?://")||(t="http://"+t),''+e+""})),e},pluralize:function(e,t,n){return n?e+t:e},toTitleCase:function(e){return e.replace(/\w\S*/g,function(e){return e.charAt(0).toUpperCase()+e.substr(1).toLowerCase()})},viewCount:function(e){return e<1e4?e:e=SL.util.math.limitDecimals(e/1e3,1)+"k"},getCustomClassesFromLESS:function(e){var t=(e||"").match(/\/\/=[a-z0-9-_ \t]{2,}(?=\n)?/gi);return t?t.map(function(e){return e=e.replace("//=",""),e=e.trim(),e=e.toLowerCase(),e=e.replace(/\s/g,"-")}):[]},moveCSSImportsToBeginning:function(e){var t="";return e=e.replace(/@import url\(["'\s]*(http:|https:)?\/\/(.*)\);?/gi,function(e){return t+=e+"\n",""}),t+e},formatIframeSource:function(e){if(e=(e||"").trim(),/', + '', + 'Unable to load iframe. This is likely due to the site\'s policy (x-frame-options).', + '', + '
' + ].join(''); + + dom.overlay.querySelector( 'iframe' ).addEventListener( 'load', function( event ) { + dom.overlay.classList.add( 'loaded' ); + }, false ); + + dom.overlay.querySelector( '.close' ).addEventListener( 'click', function( event ) { + closeOverlay(); + event.preventDefault(); + }, false ); + + dom.overlay.querySelector( '.external' ).addEventListener( 'click', function( event ) { + closeOverlay(); + }, false ); + + setTimeout( function() { + dom.overlay.classList.add( 'visible' ); + }, 1 ); + + } + + /** + * Open or close help overlay window. + * + * @param {Boolean} [override] Flag which overrides the + * toggle logic and forcibly sets the desired state. True means + * help is open, false means it's closed. + */ + function toggleHelp( override ){ + + if( typeof override === 'boolean' ) { + override ? showHelp() : closeOverlay(); + } + else { + if( dom.overlay ) { + closeOverlay(); + } + else { + showHelp(); + } + } + } + + /** + * Opens an overlay window with help material. + */ + function showHelp() { + + if( config.help ) { + + closeOverlay(); + + dom.overlay = document.createElement( 'div' ); + dom.overlay.classList.add( 'overlay' ); + dom.overlay.classList.add( 'overlay-help' ); + dom.wrapper.appendChild( dom.overlay ); + + var html = '

Keyboard Shortcuts


'; + + html += ''; + for( var key in keyboardShortcuts ) { + html += ''; + } + + // Add custom key bindings that have associated descriptions + for( var binding in registeredKeyBindings ) { + if( registeredKeyBindings[binding].key && registeredKeyBindings[binding].description ) { + html += ''; + } + } + + html += '
KEYACTION
' + key + '' + keyboardShortcuts[ key ] + '
' + registeredKeyBindings[binding].key + '' + registeredKeyBindings[binding].description + '
'; + + dom.overlay.innerHTML = [ + '
', + '', + '
', + '
', + '
'+ html +'
', + '
' + ].join(''); + + dom.overlay.querySelector( '.close' ).addEventListener( 'click', function( event ) { + closeOverlay(); + event.preventDefault(); + }, false ); + + setTimeout( function() { + dom.overlay.classList.add( 'visible' ); + }, 1 ); + + } + + } + + /** + * Closes any currently open overlay. + */ + function closeOverlay() { + + if( dom.overlay ) { + dom.overlay.parentNode.removeChild( dom.overlay ); + dom.overlay = null; + } + + } + + /** + * Applies JavaScript-controlled layout rules to the + * presentation. + */ + function layout() { + + if( dom.wrapper && !isPrintingPDF() ) { + + if( !config.disableLayout ) { + + var size = getComputedSlideSize(); + + // Layout the contents of the slides + layoutSlideContents( config.width, config.height ); + + dom.slides.style.width = size.width + 'px'; + dom.slides.style.height = size.height + 'px'; + + // Determine scale of content to fit within available space + scale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height ); + + // Respect max/min scale settings + scale = Math.max( scale, config.minScale ); + scale = Math.min( scale, config.maxScale ); + + // Don't apply any scaling styles if scale is 1 + if( scale === 1 ) { + dom.slides.style.zoom = ''; + dom.slides.style.left = ''; + dom.slides.style.top = ''; + dom.slides.style.bottom = ''; + dom.slides.style.right = ''; + transformSlides( { layout: '' } ); + } + else { + // Prefer zoom for scaling up so that content remains crisp. + // Don't use zoom to scale down since that can lead to shifts + // in text layout/line breaks. + if( scale > 1 && features.zoom ) { + dom.slides.style.zoom = scale; + dom.slides.style.left = ''; + dom.slides.style.top = ''; + dom.slides.style.bottom = ''; + dom.slides.style.right = ''; + transformSlides( { layout: '' } ); + } + // Apply scale transform as a fallback + else { + dom.slides.style.zoom = ''; + dom.slides.style.left = '50%'; + dom.slides.style.top = '50%'; + dom.slides.style.bottom = 'auto'; + dom.slides.style.right = 'auto'; + transformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +')' } ); + } + } + + // Select all slides, vertical and horizontal + var slides = toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ); + + for( var i = 0, len = slides.length; i < len; i++ ) { + var slide = slides[ i ]; + + // Don't bother updating invisible slides + if( slide.style.display === 'none' ) { + continue; + } + + if( config.center || slide.classList.contains( 'center' ) ) { + // Vertical stacks are not centred since their section + // children will be + if( slide.classList.contains( 'stack' ) ) { + slide.style.top = 0; + } + else { + slide.style.top = Math.max( ( size.height - slide.scrollHeight ) / 2, 0 ) + 'px'; + } + } + else { + slide.style.top = ''; + } + + } + + } + + updateProgress(); + updateParallax(); + + if( isOverview() ) { + updateOverview(); + } + + } + + } + + /** + * Applies layout logic to the contents of all slides in + * the presentation. + * + * @param {string|number} width + * @param {string|number} height + */ + function layoutSlideContents( width, height ) { + + // Handle sizing of elements with the 'stretch' class + toArray( dom.slides.querySelectorAll( 'section > .stretch' ) ).forEach( function( element ) { + + // Determine how much vertical space we can use + var remainingHeight = getRemainingHeight( element, height ); + + // Consider the aspect ratio of media elements + if( /(img|video)/gi.test( element.nodeName ) ) { + var nw = element.naturalWidth || element.videoWidth, + nh = element.naturalHeight || element.videoHeight; + + var es = Math.min( width / nw, remainingHeight / nh ); + + element.style.width = ( nw * es ) + 'px'; + element.style.height = ( nh * es ) + 'px'; + + } + else { + element.style.width = width + 'px'; + element.style.height = remainingHeight + 'px'; + } + + } ); + + } + + /** + * Calculates the computed pixel size of our slides. These + * values are based on the width and height configuration + * options. + * + * @param {number} [presentationWidth=dom.wrapper.offsetWidth] + * @param {number} [presentationHeight=dom.wrapper.offsetHeight] + */ + function getComputedSlideSize( presentationWidth, presentationHeight ) { + + var size = { + // Slide size + width: config.width, + height: config.height, + + // Presentation size + presentationWidth: presentationWidth || dom.wrapper.offsetWidth, + presentationHeight: presentationHeight || dom.wrapper.offsetHeight + }; + + // Reduce available space by margin + size.presentationWidth -= ( size.presentationWidth * config.margin ); + size.presentationHeight -= ( size.presentationHeight * config.margin ); + + // Slide width may be a percentage of available width + if( typeof size.width === 'string' && /%$/.test( size.width ) ) { + size.width = parseInt( size.width, 10 ) / 100 * size.presentationWidth; + } + + // Slide height may be a percentage of available height + if( typeof size.height === 'string' && /%$/.test( size.height ) ) { + size.height = parseInt( size.height, 10 ) / 100 * size.presentationHeight; + } + + return size; + + } + + /** + * Stores the vertical index of a stack so that the same + * vertical slide can be selected when navigating to and + * from the stack. + * + * @param {HTMLElement} stack The vertical stack element + * @param {string|number} [v=0] Index to memorize + */ + function setPreviousVerticalIndex( stack, v ) { + + if( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) { + stack.setAttribute( 'data-previous-indexv', v || 0 ); + } + + } + + /** + * Retrieves the vertical index which was stored using + * #setPreviousVerticalIndex() or 0 if no previous index + * exists. + * + * @param {HTMLElement} stack The vertical stack element + */ + function getPreviousVerticalIndex( stack ) { + + if( typeof stack === 'object' && typeof stack.setAttribute === 'function' && stack.classList.contains( 'stack' ) ) { + // Prefer manually defined start-indexv + var attributeName = stack.hasAttribute( 'data-start-indexv' ) ? 'data-start-indexv' : 'data-previous-indexv'; + + return parseInt( stack.getAttribute( attributeName ) || 0, 10 ); + } + + return 0; + + } + + /** + * Displays the overview of slides (quick nav) by scaling + * down and arranging all slide elements. + */ + function activateOverview() { + + // Only proceed if enabled in config + if( config.overview && !isOverview() ) { + + overview = true; + + dom.wrapper.classList.add( 'overview' ); + dom.wrapper.classList.remove( 'overview-deactivating' ); + + if( features.overviewTransitions ) { + setTimeout( function() { + dom.wrapper.classList.add( 'overview-animated' ); + }, 1 ); + } + + // Don't auto-slide while in overview mode + cancelAutoSlide(); + + // Move the backgrounds element into the slide container to + // that the same scaling is applied + dom.slides.appendChild( dom.background ); + + // Clicking on an overview slide navigates to it + toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) { + if( !slide.classList.contains( 'stack' ) ) { + slide.addEventListener( 'click', onOverviewSlideClicked, true ); + } + } ); + + // Calculate slide sizes + var margin = 70; + var slideSize = getComputedSlideSize(); + overviewSlideWidth = slideSize.width + margin; + overviewSlideHeight = slideSize.height + margin; + + // Reverse in RTL mode + if( config.rtl ) { + overviewSlideWidth = -overviewSlideWidth; + } + + updateSlidesVisibility(); + layoutOverview(); + updateOverview(); + + layout(); + + // Notify observers of the overview showing + dispatchEvent( 'overviewshown', { + 'indexh': indexh, + 'indexv': indexv, + 'currentSlide': currentSlide + } ); + + } + + } + + /** + * Uses CSS transforms to position all slides in a grid for + * display inside of the overview mode. + */ + function layoutOverview() { + + // Layout slides + toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( hslide, h ) { + hslide.setAttribute( 'data-index-h', h ); + transformElement( hslide, 'translate3d(' + ( h * overviewSlideWidth ) + 'px, 0, 0)' ); + + if( hslide.classList.contains( 'stack' ) ) { + + toArray( hslide.querySelectorAll( 'section' ) ).forEach( function( vslide, v ) { + vslide.setAttribute( 'data-index-h', h ); + vslide.setAttribute( 'data-index-v', v ); + + transformElement( vslide, 'translate3d(0, ' + ( v * overviewSlideHeight ) + 'px, 0)' ); + } ); + + } + } ); + + // Layout slide backgrounds + toArray( dom.background.childNodes ).forEach( function( hbackground, h ) { + transformElement( hbackground, 'translate3d(' + ( h * overviewSlideWidth ) + 'px, 0, 0)' ); + + toArray( hbackground.querySelectorAll( '.slide-background' ) ).forEach( function( vbackground, v ) { + transformElement( vbackground, 'translate3d(0, ' + ( v * overviewSlideHeight ) + 'px, 0)' ); + } ); + } ); + + } + + /** + * Moves the overview viewport to the current slides. + * Called each time the current slide changes. + */ + function updateOverview() { + + var vmin = Math.min( window.innerWidth, window.innerHeight ); + var scale = Math.max( vmin / 5, 150 ) / vmin; + + transformSlides( { + overview: [ + 'scale('+ scale +')', + 'translateX('+ ( -indexh * overviewSlideWidth ) +'px)', + 'translateY('+ ( -indexv * overviewSlideHeight ) +'px)' + ].join( ' ' ) + } ); + + } + + /** + * Exits the slide overview and enters the currently + * active slide. + */ + function deactivateOverview() { + + // Only proceed if enabled in config + if( config.overview ) { + + overview = false; + + dom.wrapper.classList.remove( 'overview' ); + dom.wrapper.classList.remove( 'overview-animated' ); + + // Temporarily add a class so that transitions can do different things + // depending on whether they are exiting/entering overview, or just + // moving from slide to slide + dom.wrapper.classList.add( 'overview-deactivating' ); + + setTimeout( function () { + dom.wrapper.classList.remove( 'overview-deactivating' ); + }, 1 ); + + // Move the background element back out + dom.wrapper.appendChild( dom.background ); + + // Clean up changes made to slides + toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) { + transformElement( slide, '' ); + + slide.removeEventListener( 'click', onOverviewSlideClicked, true ); + } ); + + // Clean up changes made to backgrounds + toArray( dom.background.querySelectorAll( '.slide-background' ) ).forEach( function( background ) { + transformElement( background, '' ); + } ); + + transformSlides( { overview: '' } ); + + slide( indexh, indexv ); + + layout(); + + cueAutoSlide(); + + // Notify observers of the overview hiding + dispatchEvent( 'overviewhidden', { + 'indexh': indexh, + 'indexv': indexv, + 'currentSlide': currentSlide + } ); + + } + } + + /** + * Toggles the slide overview mode on and off. + * + * @param {Boolean} [override] Flag which overrides the + * toggle logic and forcibly sets the desired state. True means + * overview is open, false means it's closed. + */ + function toggleOverview( override ) { + + if( typeof override === 'boolean' ) { + override ? activateOverview() : deactivateOverview(); + } + else { + isOverview() ? deactivateOverview() : activateOverview(); + } + + } + + /** + * Checks if the overview is currently active. + * + * @return {Boolean} true if the overview is active, + * false otherwise + */ + function isOverview() { + + return overview; + + } + + /** + * Return a hash URL that will resolve to the current slide location. + */ + function locationHash() { + + var url = '/'; + + // Attempt to create a named link based on the slide's ID + var id = currentSlide ? currentSlide.getAttribute( 'id' ) : null; + if( id ) { + id = encodeURIComponent( id ); + } + + var indexf; + if( config.fragmentInURL ) { + indexf = getIndices().f; + } + + // If the current slide has an ID, use that as a named link, + // but we don't support named links with a fragment index + if( typeof id === 'string' && id.length && indexf === undefined ) { + url = '/' + id; + } + // Otherwise use the /h/v index + else { + var hashIndexBase = config.hashOneBasedIndex ? 1 : 0; + if( indexh > 0 || indexv > 0 || indexf !== undefined ) url += indexh + hashIndexBase; + if( indexv > 0 || indexf !== undefined ) url += '/' + (indexv + hashIndexBase ); + if( indexf !== undefined ) url += '/' + indexf; + } + + return url; + + } + + /** + * Checks if the current or specified slide is vertical + * (nested within another slide). + * + * @param {HTMLElement} [slide=currentSlide] The slide to check + * orientation of + * @return {Boolean} + */ + function isVerticalSlide( slide ) { + + // Prefer slide argument, otherwise use current slide + slide = slide ? slide : currentSlide; + + return slide && slide.parentNode && !!slide.parentNode.nodeName.match( /section/i ); + + } + + /** + * Handling the fullscreen functionality via the fullscreen API + * + * @see http://fullscreen.spec.whatwg.org/ + * @see https://developer.mozilla.org/en-US/docs/DOM/Using_fullscreen_mode + */ + function enterFullscreen() { + + var element = document.documentElement; + + // Check which implementation is available + var requestMethod = element.requestFullscreen || + element.webkitRequestFullscreen || + element.webkitRequestFullScreen || + element.mozRequestFullScreen || + element.msRequestFullscreen; + + if( requestMethod ) { + requestMethod.apply( element ); + } + + } + + /** + * Enters the paused mode which fades everything on screen to + * black. + */ + function pause() { + + if( config.pause ) { + var wasPaused = dom.wrapper.classList.contains( 'paused' ); + + cancelAutoSlide(); + dom.wrapper.classList.add( 'paused' ); + + if( wasPaused === false ) { + dispatchEvent( 'paused' ); + } + } + + } + + /** + * Exits from the paused mode. + */ + function resume() { + + var wasPaused = dom.wrapper.classList.contains( 'paused' ); + dom.wrapper.classList.remove( 'paused' ); + + cueAutoSlide(); + + if( wasPaused ) { + dispatchEvent( 'resumed' ); + } + + } + + /** + * Toggles the paused mode on and off. + */ + function togglePause( override ) { + + if( typeof override === 'boolean' ) { + override ? pause() : resume(); + } + else { + isPaused() ? resume() : pause(); + } + + } + + /** + * Checks if we are currently in the paused mode. + * + * @return {Boolean} + */ + function isPaused() { + + return dom.wrapper.classList.contains( 'paused' ); + + } + + /** + * Toggles the auto slide mode on and off. + * + * @param {Boolean} [override] Flag which sets the desired state. + * True means autoplay starts, false means it stops. + */ + + function toggleAutoSlide( override ) { + + if( typeof override === 'boolean' ) { + override ? resumeAutoSlide() : pauseAutoSlide(); + } + + else { + autoSlidePaused ? resumeAutoSlide() : pauseAutoSlide(); + } + + } + + /** + * Checks if the auto slide mode is currently on. + * + * @return {Boolean} + */ + function isAutoSliding() { + + return !!( autoSlide && !autoSlidePaused ); + + } + + /** + * Steps from the current point in the presentation to the + * slide which matches the specified horizontal and vertical + * indices. + * + * @param {number} [h=indexh] Horizontal index of the target slide + * @param {number} [v=indexv] Vertical index of the target slide + * @param {number} [f] Index of a fragment within the + * target slide to activate + * @param {number} [o] Origin for use in multimaster environments + */ + function slide( h, v, f, o ) { + + // Remember where we were at before + previousSlide = currentSlide; + + // Query all horizontal slides in the deck + var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ); + + // Abort if there are no slides + if( horizontalSlides.length === 0 ) return; + + // If no vertical index is specified and the upcoming slide is a + // stack, resume at its previous vertical index + if( v === undefined && !isOverview() ) { + v = getPreviousVerticalIndex( horizontalSlides[ h ] ); + } + + // If we were on a vertical stack, remember what vertical index + // it was on so we can resume at the same position when returning + if( previousSlide && previousSlide.parentNode && previousSlide.parentNode.classList.contains( 'stack' ) ) { + setPreviousVerticalIndex( previousSlide.parentNode, indexv ); + } + + // Remember the state before this slide + var stateBefore = state.concat(); + + // Reset the state array + state.length = 0; + + var indexhBefore = indexh || 0, + indexvBefore = indexv || 0; + + // Activate and transition to the new slide + indexh = updateSlides( HORIZONTAL_SLIDES_SELECTOR, h === undefined ? indexh : h ); + indexv = updateSlides( VERTICAL_SLIDES_SELECTOR, v === undefined ? indexv : v ); + + // Update the visibility of slides now that the indices have changed + updateSlidesVisibility(); + + layout(); + + // Apply the new state + stateLoop: for( var i = 0, len = state.length; i < len; i++ ) { + // Check if this state existed on the previous slide. If it + // did, we will avoid adding it repeatedly + for( var j = 0; j < stateBefore.length; j++ ) { + if( stateBefore[j] === state[i] ) { + stateBefore.splice( j, 1 ); + continue stateLoop; + } + } + + document.documentElement.classList.add( state[i] ); + + // Dispatch custom event matching the state's name + dispatchEvent( state[i] ); + } + + // Clean up the remains of the previous state + while( stateBefore.length ) { + document.documentElement.classList.remove( stateBefore.pop() ); + } + + // Update the overview if it's currently active + if( isOverview() ) { + updateOverview(); + } + + // Find the current horizontal slide and any possible vertical slides + // within it + var currentHorizontalSlide = horizontalSlides[ indexh ], + currentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' ); + + // Store references to the previous and current slides + currentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide; + + // Show fragment, if specified + if( typeof f !== 'undefined' ) { + navigateFragment( f ); + } + + // Dispatch an event if the slide changed + var slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore ); + if (!slideChanged) { + // Ensure that the previous slide is never the same as the current + previousSlide = null; + } + + // Solves an edge case where the previous slide maintains the + // 'present' class when navigating between adjacent vertical + // stacks + if( previousSlide && previousSlide !== currentSlide ) { + previousSlide.classList.remove( 'present' ); + previousSlide.setAttribute( 'aria-hidden', 'true' ); + + // Reset all slides upon navigate to home + // Issue: #285 + if ( dom.wrapper.querySelector( HOME_SLIDE_SELECTOR ).classList.contains( 'present' ) ) { + // Launch async task + setTimeout( function () { + var slides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR + '.stack') ), i; + for( i in slides ) { + if( slides[i] ) { + // Reset stack + setPreviousVerticalIndex( slides[i], 0 ); + } + } + }, 0 ); + } + } + + if( slideChanged ) { + dispatchEvent( 'slidechanged', { + 'indexh': indexh, + 'indexv': indexv, + 'previousSlide': previousSlide, + 'currentSlide': currentSlide, + 'origin': o + } ); + } + + // Handle embedded content + if( slideChanged || !previousSlide ) { + stopEmbeddedContent( previousSlide ); + startEmbeddedContent( currentSlide ); + } + + // Announce the current slide contents, for screen readers + dom.statusDiv.textContent = getStatusText( currentSlide ); + + updateControls(); + updateProgress(); + updateBackground(); + updateParallax(); + updateSlideNumber(); + updateNotes(); + + // Update the URL hash + writeURL(); + + cueAutoSlide(); + + } + + /** + * Syncs the presentation with the current DOM. Useful + * when new slides or control elements are added or when + * the configuration has changed. + */ + function sync() { + + // Subscribe to input + removeEventListeners(); + addEventListeners(); + + // Force a layout to make sure the current config is accounted for + layout(); + + // Reflect the current autoSlide value + autoSlide = config.autoSlide; + + // Start auto-sliding if it's enabled + cueAutoSlide(); + + // Re-create the slide backgrounds + createBackgrounds(); + + // Write the current hash to the URL + writeURL(); + + sortAllFragments(); + + updateControls(); + updateProgress(); + updateSlideNumber(); + updateSlidesVisibility(); + updateBackground( true ); + updateNotesVisibility(); + updateNotes(); + + formatEmbeddedContent(); + + // Start or stop embedded content depending on global config + if( config.autoPlayMedia === false ) { + stopEmbeddedContent( currentSlide, { unloadIframes: false } ); + } + else { + startEmbeddedContent( currentSlide ); + } + + if( isOverview() ) { + layoutOverview(); + } + + } + + /** + * Updates reveal.js to keep in sync with new slide attributes. For + * example, if you add a new `data-background-image` you can call + * this to have reveal.js render the new background image. + * + * Similar to #sync() but more efficient when you only need to + * refresh a specific slide. + * + * @param {HTMLElement} slide + */ + function syncSlide( slide ) { + + syncBackground( slide ); + syncFragments( slide ); + + updateBackground(); + updateNotes(); + + loadSlide( slide ); + + } + + /** + * Formats the fragments on the given slide so that they have + * valid indices. Call this if fragments are changed in the DOM + * after reveal.js has already initialized. + * + * @param {HTMLElement} slide + */ + function syncFragments( slide ) { + + sortFragments( slide.querySelectorAll( '.fragment' ) ); + + } + + /** + * Resets all vertical slides so that only the first + * is visible. + */ + function resetVerticalSlides() { + + var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ); + horizontalSlides.forEach( function( horizontalSlide ) { + + var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ); + verticalSlides.forEach( function( verticalSlide, y ) { + + if( y > 0 ) { + verticalSlide.classList.remove( 'present' ); + verticalSlide.classList.remove( 'past' ); + verticalSlide.classList.add( 'future' ); + verticalSlide.setAttribute( 'aria-hidden', 'true' ); + } + + } ); + + } ); + + } + + /** + * Sorts and formats all of fragments in the + * presentation. + */ + function sortAllFragments() { + + var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ); + horizontalSlides.forEach( function( horizontalSlide ) { + + var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ); + verticalSlides.forEach( function( verticalSlide, y ) { + + sortFragments( verticalSlide.querySelectorAll( '.fragment' ) ); + + } ); + + if( verticalSlides.length === 0 ) sortFragments( horizontalSlide.querySelectorAll( '.fragment' ) ); + + } ); + + } + + /** + * Randomly shuffles all slides in the deck. + */ + function shuffle() { + + var slides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ); + + slides.forEach( function( slide ) { + + // Insert this slide next to another random slide. This may + // cause the slide to insert before itself but that's fine. + dom.slides.insertBefore( slide, slides[ Math.floor( Math.random() * slides.length ) ] ); + + } ); + + } + + /** + * Updates one dimension of slides by showing the slide + * with the specified index. + * + * @param {string} selector A CSS selector that will fetch + * the group of slides we are working with + * @param {number} index The index of the slide that should be + * shown + * + * @return {number} The index of the slide that is now shown, + * might differ from the passed in index if it was out of + * bounds. + */ + function updateSlides( selector, index ) { + + // Select all slides and convert the NodeList result to + // an array + var slides = toArray( dom.wrapper.querySelectorAll( selector ) ), + slidesLength = slides.length; + + var printMode = isPrintingPDF(); + + if( slidesLength ) { + + // Should the index loop? + if( config.loop ) { + index %= slidesLength; + + if( index < 0 ) { + index = slidesLength + index; + } + } + + // Enforce max and minimum index bounds + index = Math.max( Math.min( index, slidesLength - 1 ), 0 ); + + for( var i = 0; i < slidesLength; i++ ) { + var element = slides[i]; + + var reverse = config.rtl && !isVerticalSlide( element ); + + element.classList.remove( 'past' ); + element.classList.remove( 'present' ); + element.classList.remove( 'future' ); + + // http://www.w3.org/html/wg/drafts/html/master/editing.html#the-hidden-attribute + element.setAttribute( 'hidden', '' ); + element.setAttribute( 'aria-hidden', 'true' ); + + // If this element contains vertical slides + if( element.querySelector( 'section' ) ) { + element.classList.add( 'stack' ); + } + + // If we're printing static slides, all slides are "present" + if( printMode ) { + element.classList.add( 'present' ); + continue; + } + + if( i < index ) { + // Any element previous to index is given the 'past' class + element.classList.add( reverse ? 'future' : 'past' ); + + if( config.fragments ) { + var pastFragments = toArray( element.querySelectorAll( '.fragment' ) ); + + // Show all fragments on prior slides + while( pastFragments.length ) { + var pastFragment = pastFragments.pop(); + pastFragment.classList.add( 'visible' ); + pastFragment.classList.remove( 'current-fragment' ); + } + } + } + else if( i > index ) { + // Any element subsequent to index is given the 'future' class + element.classList.add( reverse ? 'past' : 'future' ); + + if( config.fragments ) { + var futureFragments = toArray( element.querySelectorAll( '.fragment.visible' ) ); + + // No fragments in future slides should be visible ahead of time + while( futureFragments.length ) { + var futureFragment = futureFragments.pop(); + futureFragment.classList.remove( 'visible' ); + futureFragment.classList.remove( 'current-fragment' ); + } + } + } + } + + // Mark the current slide as present + slides[index].classList.add( 'present' ); + slides[index].removeAttribute( 'hidden' ); + slides[index].removeAttribute( 'aria-hidden' ); + + // If this slide has a state associated with it, add it + // onto the current state of the deck + var slideState = slides[index].getAttribute( 'data-state' ); + if( slideState ) { + state = state.concat( slideState.split( ' ' ) ); + } + + } + else { + // Since there are no slides we can't be anywhere beyond the + // zeroth index + index = 0; + } + + return index; + + } + + /** + * Optimization method; hide all slides that are far away + * from the present slide. + */ + function updateSlidesVisibility() { + + // Select all slides and convert the NodeList result to + // an array + var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ), + horizontalSlidesLength = horizontalSlides.length, + distanceX, + distanceY; + + if( horizontalSlidesLength && typeof indexh !== 'undefined' ) { + + // The number of steps away from the present slide that will + // be visible + var viewDistance = isOverview() ? 10 : config.viewDistance; + + // Limit view distance on weaker devices + if( isMobileDevice ) { + viewDistance = isOverview() ? 6 : 2; + } + + // All slides need to be visible when exporting to PDF + if( isPrintingPDF() ) { + viewDistance = Number.MAX_VALUE; + } + + for( var x = 0; x < horizontalSlidesLength; x++ ) { + var horizontalSlide = horizontalSlides[x]; + + var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ), + verticalSlidesLength = verticalSlides.length; + + // Determine how far away this slide is from the present + distanceX = Math.abs( ( indexh || 0 ) - x ) || 0; + + // If the presentation is looped, distance should measure + // 1 between the first and last slides + if( config.loop ) { + distanceX = Math.abs( ( ( indexh || 0 ) - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0; + } + + // Show the horizontal slide if it's within the view distance + if( distanceX < viewDistance ) { + loadSlide( horizontalSlide ); + } + else { + unloadSlide( horizontalSlide ); + } + + if( verticalSlidesLength ) { + + var oy = getPreviousVerticalIndex( horizontalSlide ); + + for( var y = 0; y < verticalSlidesLength; y++ ) { + var verticalSlide = verticalSlides[y]; + + distanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy ); + + if( distanceX + distanceY < viewDistance ) { + loadSlide( verticalSlide ); + } + else { + unloadSlide( verticalSlide ); + } + } + + } + } + + // Flag if there are ANY vertical slides, anywhere in the deck + if( dom.wrapper.querySelectorAll( '.slides>section>section' ).length ) { + dom.wrapper.classList.add( 'has-vertical-slides' ); + } + else { + dom.wrapper.classList.remove( 'has-vertical-slides' ); + } + + // Flag if there are ANY horizontal slides, anywhere in the deck + if( dom.wrapper.querySelectorAll( '.slides>section' ).length > 1 ) { + dom.wrapper.classList.add( 'has-horizontal-slides' ); + } + else { + dom.wrapper.classList.remove( 'has-horizontal-slides' ); + } + + } + + } + + /** + * Pick up notes from the current slide and display them + * to the viewer. + * + * @see {@link config.showNotes} + */ + function updateNotes() { + + if( config.showNotes && dom.speakerNotes && currentSlide && !isPrintingPDF() ) { + + dom.speakerNotes.innerHTML = getSlideNotes() || 'No notes on this slide.'; + + } + + } + + /** + * Updates the visibility of the speaker notes sidebar that + * is used to share annotated slides. The notes sidebar is + * only visible if showNotes is true and there are notes on + * one or more slides in the deck. + */ + function updateNotesVisibility() { + + if( config.showNotes && hasNotes() ) { + dom.wrapper.classList.add( 'show-notes' ); + } + else { + dom.wrapper.classList.remove( 'show-notes' ); + } + + } + + /** + * Checks if there are speaker notes for ANY slide in the + * presentation. + */ + function hasNotes() { + + return dom.slides.querySelectorAll( '[data-notes], aside.notes' ).length > 0; + + } + + /** + * Updates the progress bar to reflect the current slide. + */ + function updateProgress() { + + // Update progress if enabled + if( config.progress && dom.progressbar ) { + + dom.progressbar.style.width = getProgress() * dom.wrapper.offsetWidth + 'px'; + + } + + } + + + /** + * Updates the slide number div to reflect the current slide. + * + * The following slide number formats are available: + * "h.v": horizontal . vertical slide number (default) + * "h/v": horizontal / vertical slide number + * "c": flattened slide number + * "c/t": flattened slide number / total slides + */ + function updateSlideNumber() { + + // Update slide number if enabled + if( config.slideNumber && dom.slideNumber ) { + + var value = []; + var format = 'h.v'; + + // Check if a custom number format is available + if( typeof config.slideNumber === 'string' ) { + format = config.slideNumber; + } + + // If there are ONLY vertical slides in this deck, always use + // a flattened slide number + if( !/c/.test( format ) && dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ).length === 1 ) { + format = 'c'; + } + + switch( format ) { + case 'c': + value.push( getSlidePastCount() + 1 ); + break; + case 'c/t': + value.push( getSlidePastCount() + 1, '/', getTotalSlides() ); + break; + case 'h/v': + value.push( indexh + 1 ); + if( isVerticalSlide() ) value.push( '/', indexv + 1 ); + break; + default: + value.push( indexh + 1 ); + if( isVerticalSlide() ) value.push( '.', indexv + 1 ); + } + + dom.slideNumber.innerHTML = formatSlideNumber( value[0], value[1], value[2] ); + } + + } + + /** + * Applies HTML formatting to a slide number before it's + * written to the DOM. + * + * @param {number} a Current slide + * @param {string} delimiter Character to separate slide numbers + * @param {(number|*)} b Total slides + * @return {string} HTML string fragment + */ + function formatSlideNumber( a, delimiter, b ) { + + var url = '#' + locationHash(); + if( typeof b === 'number' && !isNaN( b ) ) { + return '' + + ''+ a +'' + + ''+ delimiter +'' + + ''+ b +'' + + ''; + } + else { + return '' + + ''+ a +'' + + ''; + } + + } + + /** + * Updates the state of all control/navigation arrows. + */ + function updateControls() { + + var routes = availableRoutes(); + var fragments = availableFragments(); + + // Remove the 'enabled' class from all directions + dom.controlsLeft.concat( dom.controlsRight ) + .concat( dom.controlsUp ) + .concat( dom.controlsDown ) + .concat( dom.controlsPrev ) + .concat( dom.controlsNext ).forEach( function( node ) { + node.classList.remove( 'enabled' ); + node.classList.remove( 'fragmented' ); + + // Set 'disabled' attribute on all directions + node.setAttribute( 'disabled', 'disabled' ); + } ); + + // Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons + if( routes.left ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( routes.right ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( routes.up ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( routes.down ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + + // Prev/next buttons + if( routes.left || routes.up ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( routes.right || routes.down ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } ); + + // Highlight fragment directions + if( currentSlide ) { + + // Always apply fragment decorator to prev/next buttons + if( fragments.prev ) dom.controlsPrev.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( fragments.next ) dom.controlsNext.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + + // Apply fragment decorators to directional buttons based on + // what slide axis they are in + if( isVerticalSlide( currentSlide ) ) { + if( fragments.prev ) dom.controlsUp.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( fragments.next ) dom.controlsDown.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + } + else { + if( fragments.prev ) dom.controlsLeft.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + if( fragments.next ) dom.controlsRight.forEach( function( el ) { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } ); + } + + } + + if( config.controlsTutorial ) { + + // Highlight control arrows with an animation to ensure + // that the viewer knows how to navigate + if( !hasNavigatedDown && routes.down ) { + dom.controlsDownArrow.classList.add( 'highlight' ); + } + else { + dom.controlsDownArrow.classList.remove( 'highlight' ); + + if( !hasNavigatedRight && routes.right && indexv === 0 ) { + dom.controlsRightArrow.classList.add( 'highlight' ); + } + else { + dom.controlsRightArrow.classList.remove( 'highlight' ); + } + } + + } + + } + + /** + * Updates the background elements to reflect the current + * slide. + * + * @param {boolean} includeAll If true, the backgrounds of + * all vertical slides (not just the present) will be updated. + */ + function updateBackground( includeAll ) { + + var currentBackground = null; + + // Reverse past/future classes when in RTL mode + var horizontalPast = config.rtl ? 'future' : 'past', + horizontalFuture = config.rtl ? 'past' : 'future'; + + // Update the classes of all backgrounds to match the + // states of their slides (past/present/future) + toArray( dom.background.childNodes ).forEach( function( backgroundh, h ) { + + backgroundh.classList.remove( 'past' ); + backgroundh.classList.remove( 'present' ); + backgroundh.classList.remove( 'future' ); + + if( h < indexh ) { + backgroundh.classList.add( horizontalPast ); + } + else if ( h > indexh ) { + backgroundh.classList.add( horizontalFuture ); + } + else { + backgroundh.classList.add( 'present' ); + + // Store a reference to the current background element + currentBackground = backgroundh; + } + + if( includeAll || h === indexh ) { + toArray( backgroundh.querySelectorAll( '.slide-background' ) ).forEach( function( backgroundv, v ) { + + backgroundv.classList.remove( 'past' ); + backgroundv.classList.remove( 'present' ); + backgroundv.classList.remove( 'future' ); + + if( v < indexv ) { + backgroundv.classList.add( 'past' ); + } + else if ( v > indexv ) { + backgroundv.classList.add( 'future' ); + } + else { + backgroundv.classList.add( 'present' ); + + // Only if this is the present horizontal and vertical slide + if( h === indexh ) currentBackground = backgroundv; + } + + } ); + } + + } ); + + // Stop content inside of previous backgrounds + if( previousBackground ) { + + stopEmbeddedContent( previousBackground ); + + } + + // Start content in the current background + if( currentBackground ) { + + startEmbeddedContent( currentBackground ); + + var backgroundImageURL = currentBackground.style.backgroundImage || ''; + + // Restart GIFs (doesn't work in Firefox) + if( /\.gif/i.test( backgroundImageURL ) ) { + currentBackground.style.backgroundImage = ''; + window.getComputedStyle( currentBackground ).opacity; + currentBackground.style.backgroundImage = backgroundImageURL; + } + + // Don't transition between identical backgrounds. This + // prevents unwanted flicker. + var previousBackgroundHash = previousBackground ? previousBackground.getAttribute( 'data-background-hash' ) : null; + var currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' ); + if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== previousBackground ) { + dom.background.classList.add( 'no-transition' ); + } + + previousBackground = currentBackground; + + } + + // If there's a background brightness flag for this slide, + // bubble it to the .reveal container + if( currentSlide ) { + [ 'has-light-background', 'has-dark-background' ].forEach( function( classToBubble ) { + if( currentSlide.classList.contains( classToBubble ) ) { + dom.wrapper.classList.add( classToBubble ); + } + else { + dom.wrapper.classList.remove( classToBubble ); + } + } ); + } + + // Allow the first background to apply without transition + setTimeout( function() { + dom.background.classList.remove( 'no-transition' ); + }, 1 ); + + } + + /** + * Updates the position of the parallax background based + * on the current slide index. + */ + function updateParallax() { + + if( config.parallaxBackgroundImage ) { + + var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ), + verticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR ); + + var backgroundSize = dom.background.style.backgroundSize.split( ' ' ), + backgroundWidth, backgroundHeight; + + if( backgroundSize.length === 1 ) { + backgroundWidth = backgroundHeight = parseInt( backgroundSize[0], 10 ); + } + else { + backgroundWidth = parseInt( backgroundSize[0], 10 ); + backgroundHeight = parseInt( backgroundSize[1], 10 ); + } + + var slideWidth = dom.background.offsetWidth, + horizontalSlideCount = horizontalSlides.length, + horizontalOffsetMultiplier, + horizontalOffset; + + if( typeof config.parallaxBackgroundHorizontal === 'number' ) { + horizontalOffsetMultiplier = config.parallaxBackgroundHorizontal; + } + else { + horizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0; + } + + horizontalOffset = horizontalOffsetMultiplier * indexh * -1; + + var slideHeight = dom.background.offsetHeight, + verticalSlideCount = verticalSlides.length, + verticalOffsetMultiplier, + verticalOffset; + + if( typeof config.parallaxBackgroundVertical === 'number' ) { + verticalOffsetMultiplier = config.parallaxBackgroundVertical; + } + else { + verticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 ); + } + + verticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indexv : 0; + + dom.background.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px'; + + } + + } + + /** + * Called when the given slide is within the configured view + * distance. Shows the slide element and loads any content + * that is set to load lazily (data-src). + * + * @param {HTMLElement} slide Slide to show + */ + function loadSlide( slide, options ) { + + options = options || {}; + + // Show the slide element + slide.style.display = config.display; + + // Media elements with data-src attributes + toArray( slide.querySelectorAll( 'img[data-src], video[data-src], audio[data-src]' ) ).forEach( function( element ) { + element.setAttribute( 'src', element.getAttribute( 'data-src' ) ); + element.setAttribute( 'data-lazy-loaded', '' ); + element.removeAttribute( 'data-src' ); + } ); + + // Media elements with children + toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( media ) { + var sources = 0; + + toArray( media.querySelectorAll( 'source[data-src]' ) ).forEach( function( source ) { + source.setAttribute( 'src', source.getAttribute( 'data-src' ) ); + source.removeAttribute( 'data-src' ); + source.setAttribute( 'data-lazy-loaded', '' ); + sources += 1; + } ); + + // If we rewrote sources for this video/audio element, we need + // to manually tell it to load from its new origin + if( sources > 0 ) { + media.load(); + } + } ); + + + // Show the corresponding background element + var background = slide.slideBackgroundElement; + if( background ) { + background.style.display = 'block'; + + var backgroundContent = slide.slideBackgroundContentElement; + + // If the background contains media, load it + if( background.hasAttribute( 'data-loaded' ) === false ) { + background.setAttribute( 'data-loaded', 'true' ); + + var backgroundImage = slide.getAttribute( 'data-background-image' ), + backgroundVideo = slide.getAttribute( 'data-background-video' ), + backgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ), + backgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' ), + backgroundIframe = slide.getAttribute( 'data-background-iframe' ); + + // Images + if( backgroundImage ) { + backgroundContent.style.backgroundImage = 'url('+ encodeURI( backgroundImage ) +')'; + } + // Videos + else if ( backgroundVideo && !isSpeakerNotes() ) { + var video = document.createElement( 'video' ); + + if( backgroundVideoLoop ) { + video.setAttribute( 'loop', '' ); + } + + if( backgroundVideoMuted ) { + video.muted = true; + } + + // Inline video playback works (at least in Mobile Safari) as + // long as the video is muted and the `playsinline` attribute is + // present + if( isMobileDevice ) { + video.muted = true; + video.autoplay = true; + video.setAttribute( 'playsinline', '' ); + } + + // Support comma separated lists of video sources + backgroundVideo.split( ',' ).forEach( function( source ) { + video.innerHTML += ''; + } ); + + backgroundContent.appendChild( video ); + } + // Iframes + else if( backgroundIframe && options.excludeIframes !== true ) { + var iframe = document.createElement( 'iframe' ); + iframe.setAttribute( 'allowfullscreen', '' ); + iframe.setAttribute( 'mozallowfullscreen', '' ); + iframe.setAttribute( 'webkitallowfullscreen', '' ); + + // Only load autoplaying content when the slide is shown to + // avoid having it play in the background + if( /autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) { + iframe.setAttribute( 'data-src', backgroundIframe ); + } + else { + iframe.setAttribute( 'src', backgroundIframe ); + } + + iframe.style.width = '100%'; + iframe.style.height = '100%'; + iframe.style.maxHeight = '100%'; + iframe.style.maxWidth = '100%'; + + backgroundContent.appendChild( iframe ); + } + } + + } + + } + + /** + * Unloads and hides the given slide. This is called when the + * slide is moved outside of the configured view distance. + * + * @param {HTMLElement} slide + */ + function unloadSlide( slide ) { + + // Hide the slide element + slide.style.display = 'none'; + + // Hide the corresponding background element + var background = getSlideBackground( slide ); + if( background ) { + background.style.display = 'none'; + } + + // Reset lazy-loaded media elements with src attributes + toArray( slide.querySelectorAll( 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src]' ) ).forEach( function( element ) { + element.setAttribute( 'data-src', element.getAttribute( 'src' ) ); + element.removeAttribute( 'src' ); + } ); + + // Reset lazy-loaded media elements with children + toArray( slide.querySelectorAll( 'video[data-lazy-loaded] source[src], audio source[src]' ) ).forEach( function( source ) { + source.setAttribute( 'data-src', source.getAttribute( 'src' ) ); + source.removeAttribute( 'src' ); + } ); + + } + + /** + * Determine what available routes there are for navigation. + * + * @return {{left: boolean, right: boolean, up: boolean, down: boolean}} + */ + function availableRoutes() { + + var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ), + verticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR ); + + var routes = { + left: indexh > 0, + right: indexh < horizontalSlides.length - 1, + up: indexv > 0, + down: indexv < verticalSlides.length - 1 + }; + + // Looped presentations can always be navigated as long as + // there are slides available + if( config.loop ) { + if( horizontalSlides.length > 1 ) { + routes.left = true; + routes.right = true; + } + + if( verticalSlides.length > 1 ) { + routes.up = true; + routes.down = true; + } + } + + // Reverse horizontal controls for rtl + if( config.rtl ) { + var left = routes.left; + routes.left = routes.right; + routes.right = left; + } + + return routes; + + } + + /** + * Returns an object describing the available fragment + * directions. + * + * @return {{prev: boolean, next: boolean}} + */ + function availableFragments() { + + if( currentSlide && config.fragments ) { + var fragments = currentSlide.querySelectorAll( '.fragment' ); + var hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.visible)' ); + + return { + prev: fragments.length - hiddenFragments.length > 0, + next: !!hiddenFragments.length + }; + } + else { + return { prev: false, next: false }; + } + + } + + /** + * Enforces origin-specific format rules for embedded media. + */ + function formatEmbeddedContent() { + + var _appendParamToIframeSource = function( sourceAttribute, sourceURL, param ) { + toArray( dom.slides.querySelectorAll( 'iframe['+ sourceAttribute +'*="'+ sourceURL +'"]' ) ).forEach( function( el ) { + var src = el.getAttribute( sourceAttribute ); + if( src && src.indexOf( param ) === -1 ) { + el.setAttribute( sourceAttribute, src + ( !/\?/.test( src ) ? '?' : '&' ) + param ); + } + }); + }; + + // YouTube frames must include "?enablejsapi=1" + _appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' ); + _appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' ); + + // Vimeo frames must include "?api=1" + _appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' ); + _appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' ); + + // Always show media controls on mobile devices + if( isMobileDevice ) { + toArray( dom.slides.querySelectorAll( 'video, audio' ) ).forEach( function( el ) { + el.controls = true; + } ); + } + + } + + /** + * Start playback of any embedded content inside of + * the given element. + * + * @param {HTMLElement} element + */ + function startEmbeddedContent( element ) { + + if( element && !isSpeakerNotes() ) { + + // Restart GIFs + toArray( element.querySelectorAll( 'img[src$=".gif"]' ) ).forEach( function( el ) { + // Setting the same unchanged source like this was confirmed + // to work in Chrome, FF & Safari + el.setAttribute( 'src', el.getAttribute( 'src' ) ); + } ); + + // HTML5 media elements + toArray( element.querySelectorAll( 'video, audio' ) ).forEach( function( el ) { + if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) { + return; + } + + // Prefer an explicit global autoplay setting + var autoplay = config.autoPlayMedia; + + // If no global setting is available, fall back on the element's + // own autoplay setting + if( typeof autoplay !== 'boolean' ) { + autoplay = el.hasAttribute( 'data-autoplay' ) || !!closestParent( el, '.slide-background' ); + } + + if( autoplay && typeof el.play === 'function' ) { + + // If the media is ready, start playback + if( el.readyState > 1 ) { + startEmbeddedMedia( { target: el } ); + } + // Mobile devices never fire a loaded event so instead + // of waiting, we initiate playback + else if( isMobileDevice ) { + el.play(); + } + // If the media isn't loaded, wait before playing + else { + el.removeEventListener( 'loadeddata', startEmbeddedMedia ); // remove first to avoid dupes + el.addEventListener( 'loadeddata', startEmbeddedMedia ); + } + + } + } ); + + // Normal iframes + toArray( element.querySelectorAll( 'iframe[src]' ) ).forEach( function( el ) { + if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) { + return; + } + + startEmbeddedIframe( { target: el } ); + } ); + + // Lazy loading iframes + toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) { + if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) { + return; + } + + if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) { + el.removeEventListener( 'load', startEmbeddedIframe ); // remove first to avoid dupes + el.addEventListener( 'load', startEmbeddedIframe ); + el.setAttribute( 'src', el.getAttribute( 'data-src' ) ); + } + } ); + + } + + } + + /** + * Starts playing an embedded video/audio element after + * it has finished loading. + * + * @param {object} event + */ + function startEmbeddedMedia( event ) { + + var isAttachedToDOM = !!closestParent( event.target, 'html' ), + isVisible = !!closestParent( event.target, '.present' ); + + if( isAttachedToDOM && isVisible ) { + event.target.currentTime = 0; + event.target.play(); + } + + event.target.removeEventListener( 'loadeddata', startEmbeddedMedia ); + + } + + /** + * "Starts" the content of an embedded iframe using the + * postMessage API. + * + * @param {object} event + */ + function startEmbeddedIframe( event ) { + + var iframe = event.target; + + if( iframe && iframe.contentWindow ) { + + var isAttachedToDOM = !!closestParent( event.target, 'html' ), + isVisible = !!closestParent( event.target, '.present' ); + + if( isAttachedToDOM && isVisible ) { + + // Prefer an explicit global autoplay setting + var autoplay = config.autoPlayMedia; + + // If no global setting is available, fall back on the element's + // own autoplay setting + if( typeof autoplay !== 'boolean' ) { + autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closestParent( iframe, '.slide-background' ); + } + + // YouTube postMessage API + if( /youtube\.com\/embed\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) { + iframe.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' ); + } + // Vimeo postMessage API + else if( /player\.vimeo\.com\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) { + iframe.contentWindow.postMessage( '{"method":"play"}', '*' ); + } + // Generic postMessage API + else { + iframe.contentWindow.postMessage( 'slide:start', '*' ); + } + + } + + } + + } + + /** + * Stop playback of any embedded content inside of + * the targeted slide. + * + * @param {HTMLElement} element + */ + function stopEmbeddedContent( element, options ) { + + options = extend( { + // Defaults + unloadIframes: true + }, options || {} ); + + if( element && element.parentNode ) { + // HTML5 media elements + toArray( element.querySelectorAll( 'video, audio' ) ).forEach( function( el ) { + if( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) { + el.setAttribute('data-paused-by-reveal', ''); + el.pause(); + } + } ); + + // Generic postMessage API for non-lazy loaded iframes + toArray( element.querySelectorAll( 'iframe' ) ).forEach( function( el ) { + if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' ); + el.removeEventListener( 'load', startEmbeddedIframe ); + }); + + // YouTube postMessage API + toArray( element.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) { + if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) { + el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' ); + } + }); + + // Vimeo postMessage API + toArray( element.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) { + if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) { + el.contentWindow.postMessage( '{"method":"pause"}', '*' ); + } + }); + + if( options.unloadIframes === true ) { + // Unload lazy-loaded iframes + toArray( element.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) { + // Only removing the src doesn't actually unload the frame + // in all browsers (Firefox) so we set it to blank first + el.setAttribute( 'src', 'about:blank' ); + el.removeAttribute( 'src' ); + } ); + } + } + + } + + /** + * Returns the number of past slides. This can be used as a global + * flattened index for slides. + * + * @return {number} Past slide count + */ + function getSlidePastCount() { + + var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ); + + // The number of past slides + var pastCount = 0; + + // Step through all slides and count the past ones + mainLoop: for( var i = 0; i < horizontalSlides.length; i++ ) { + + var horizontalSlide = horizontalSlides[i]; + var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ); + + for( var j = 0; j < verticalSlides.length; j++ ) { + + // Stop as soon as we arrive at the present + if( verticalSlides[j].classList.contains( 'present' ) ) { + break mainLoop; + } + + pastCount++; + + } + + // Stop as soon as we arrive at the present + if( horizontalSlide.classList.contains( 'present' ) ) { + break; + } + + // Don't count the wrapping section for vertical slides + if( horizontalSlide.classList.contains( 'stack' ) === false ) { + pastCount++; + } + + } + + return pastCount; + + } + + /** + * Returns a value ranging from 0-1 that represents + * how far into the presentation we have navigated. + * + * @return {number} + */ + function getProgress() { + + // The number of past and total slides + var totalCount = getTotalSlides(); + var pastCount = getSlidePastCount(); + + if( currentSlide ) { + + var allFragments = currentSlide.querySelectorAll( '.fragment' ); + + // If there are fragments in the current slide those should be + // accounted for in the progress. + if( allFragments.length > 0 ) { + var visibleFragments = currentSlide.querySelectorAll( '.fragment.visible' ); + + // This value represents how big a portion of the slide progress + // that is made up by its fragments (0-1) + var fragmentWeight = 0.9; + + // Add fragment progress to the past slide count + pastCount += ( visibleFragments.length / allFragments.length ) * fragmentWeight; + } + + } + + return pastCount / ( totalCount - 1 ); + + } + + /** + * Checks if this presentation is running inside of the + * speaker notes window. + * + * @return {boolean} + */ + function isSpeakerNotes() { + + return !!window.location.search.match( /receiver/gi ); + + } + + /** + * Reads the current URL (hash) and navigates accordingly. + */ + function readURL() { + + var hash = window.location.hash; + + // Attempt to parse the hash as either an index or name + var bits = hash.slice( 2 ).split( '/' ), + name = hash.replace( /#|\//gi, '' ); + + // If the first bit is invalid and there is a name we can + // assume that this is a named link + if( isNaN( parseInt( bits[0], 10 ) ) && name.length ) { + var element; + + // Ensure the named link is a valid HTML ID attribute + try { + element = document.getElementById( decodeURIComponent( name ) ); + } + catch ( error ) { } + + // Ensure that we're not already on a slide with the same name + var isSameNameAsCurrentSlide = currentSlide ? currentSlide.getAttribute( 'id' ) === name : false; + + if( element && !isSameNameAsCurrentSlide ) { + // Find the position of the named slide and navigate to it + var indices = Reveal.getIndices( element ); + slide( indices.h, indices.v ); + } + // If the slide doesn't exist, navigate to the current slide + else { + slide( indexh || 0, indexv || 0 ); + } + } + else { + var hashIndexBase = config.hashOneBasedIndex ? 1 : 0; + + // Read the index components of the hash + var h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0, + v = ( parseInt( bits[1], 10 ) - hashIndexBase ) || 0, + f; + + if( config.fragmentInURL ) { + f = parseInt( bits[2], 10 ); + if( isNaN( f ) ) { + f = undefined; + } + } + + if( h !== indexh || v !== indexv || f !== undefined ) { + slide( h, v, f ); + } + } + + } + + /** + * Updates the page URL (hash) to reflect the current + * state. + * + * @param {number} delay The time in ms to wait before + * writing the hash + */ + function writeURL( delay ) { + + if( config.history ) { + + // Make sure there's never more than one timeout running + clearTimeout( writeURLTimeout ); + + // If a delay is specified, timeout this call + if( typeof delay === 'number' ) { + writeURLTimeout = setTimeout( writeURL, delay ); + } + else if( currentSlide ) { + window.location.hash = locationHash(); + } + } + + } + /** + * Retrieves the h/v location and fragment of the current, + * or specified, slide. + * + * @param {HTMLElement} [slide] If specified, the returned + * index will be for this slide rather than the currently + * active one + * + * @return {{h: number, v: number, f: number}} + */ + function getIndices( slide ) { + + // By default, return the current indices + var h = indexh, + v = indexv, + f; + + // If a slide is specified, return the indices of that slide + if( slide ) { + var isVertical = isVerticalSlide( slide ); + var slideh = isVertical ? slide.parentNode : slide; + + // Select all horizontal slides + var horizontalSlides = toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ); + + // Now that we know which the horizontal slide is, get its index + h = Math.max( horizontalSlides.indexOf( slideh ), 0 ); + + // Assume we're not vertical + v = undefined; + + // If this is a vertical slide, grab the vertical index + if( isVertical ) { + v = Math.max( toArray( slide.parentNode.querySelectorAll( 'section' ) ).indexOf( slide ), 0 ); + } + } + + if( !slide && currentSlide ) { + var hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0; + if( hasFragments ) { + var currentFragment = currentSlide.querySelector( '.current-fragment' ); + if( currentFragment && currentFragment.hasAttribute( 'data-fragment-index' ) ) { + f = parseInt( currentFragment.getAttribute( 'data-fragment-index' ), 10 ); + } + else { + f = currentSlide.querySelectorAll( '.fragment.visible' ).length - 1; + } + } + } + + return { h: h, v: v, f: f }; + + } + + /** + * Retrieves all slides in this presentation. + */ + function getSlides() { + + return toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR + ':not(.stack)' )); + + } + + /** + * Retrieves the total number of slides in this presentation. + * + * @return {number} + */ + function getTotalSlides() { + + return getSlides().length; + + } + + /** + * Returns the slide element matching the specified index. + * + * @return {HTMLElement} + */ + function getSlide( x, y ) { + + var horizontalSlide = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR )[ x ]; + var verticalSlides = horizontalSlide && horizontalSlide.querySelectorAll( 'section' ); + + if( verticalSlides && verticalSlides.length && typeof y === 'number' ) { + return verticalSlides ? verticalSlides[ y ] : undefined; + } + + return horizontalSlide; + + } + + /** + * Returns the background element for the given slide. + * All slides, even the ones with no background properties + * defined, have a background element so as long as the + * index is valid an element will be returned. + * + * @param {mixed} x Horizontal background index OR a slide + * HTML element + * @param {number} y Vertical background index + * @return {(HTMLElement[]|*)} + */ + function getSlideBackground( x, y ) { + + var slide = typeof x === 'number' ? getSlide( x, y ) : x; + if( slide ) { + return slide.slideBackgroundElement; + } + + return undefined; + + } + + /** + * Retrieves the speaker notes from a slide. Notes can be + * defined in two ways: + * 1. As a data-notes attribute on the slide
+ * 2. As an