aboutsummaryrefslogtreecommitdiff
path: root/js
diff options
context:
space:
mode:
authorHakim El Hattab <hakim.elhattab@gmail.com>2019-03-01 21:28:52 +0100
committerHakim El Hattab <hakim.elhattab@gmail.com>2019-03-01 21:28:52 +0100
commit4862de26eb75d44b36849ef574db986203d3c879 (patch)
treed358131f23f3b9005866889ebcb743ce980bfcbe /js
parent213023760ab2cfaad4db022844da97e692c2ea50 (diff)
downloadperl-software-in-gnu-guix-4862de26eb75d44b36849ef574db986203d3c879.tar
perl-software-in-gnu-guix-4862de26eb75d44b36849ef574db986203d3c879.tar.gz
async loading of external markdown, add Reveal.registerPlugin()
Diffstat (limited to 'js')
-rw-r--r--js/reveal.js104
1 files changed, 75 insertions, 29 deletions
diff --git a/js/reveal.js b/js/reveal.js
index a17a33a..9b29f78 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -319,6 +319,12 @@
// Cached references to DOM elements
dom = {},
+ // A list of registered reveal.js plugins
+ plugins = {},
+
+ // List of asynchronously loaded reveal.js dependencies
+ asyncDependencies = [],
+
// Features supported by the browser, see #checkCapabilities()
features = {},
@@ -434,7 +440,7 @@
// Hide the address bar in mobile browsers
hideAddressBar();
- // Loads the dependencies and continues to #start() once done
+ // Loads dependencies and continues to #start() once done
load();
}
@@ -489,37 +495,22 @@
function load() {
var scripts = [],
- scriptsAsync = [],
- scriptsToPreload = 0;
-
- // Called once synchronous scripts finish loading
- function afterSynchronousScriptsLoaded() {
- // Load asynchronous scripts
- if( scriptsAsync.length ) {
- scriptsAsync.forEach( function( s ) {
- loadScript( s.src, s.callback );
- } );
- }
-
- start();
- }
-
- for( var i = 0, len = config.dependencies.length; i < len; i++ ) {
- var s = config.dependencies[i];
+ scriptsToLoad = 0;
+ config.dependencies.forEach( function( s ) {
// Load if there's no condition or the condition is truthy
if( !s.condition || s.condition() ) {
if( s.async ) {
- scriptsAsync.push( s );
+ asyncDependencies.push( s );
}
else {
scripts.push( s );
}
}
- }
+ } );
if( scripts.length ) {
- scriptsToPreload = scripts.length;
+ scriptsToLoad = scripts.length;
// Load synchronous scripts
scripts.forEach( function( s ) {
@@ -527,22 +518,67 @@
if( typeof s.callback === 'function' ) s.callback();
- if( --scriptsToPreload === 0 ) {
-
- afterSynchronousScriptsLoaded();
-
+ if( --scriptsToLoad === 0 ) {
+ loadPlugins();
}
} );
} );
}
else {
- afterSynchronousScriptsLoaded();
+ loadPlugins();
+ }
+
+ }
+
+ /**
+ * Loads all plugins that require preloading.
+ */
+ function loadPlugins() {
+
+ var pluginsToLoad = Object.keys( plugins ).length;
+
+ for( var i in plugins ) {
+
+ var plugin = plugins[i];
+
+ // If the plugin has an 'init' method, initialize and
+ // wait for the callback
+ if( typeof plugin.init === 'function' ) {
+ plugin.init( function() {
+ if( --pluginsToLoad === 0 ) {
+ loadAsyncDependencies();
+ }
+ } );
+ }
+ else {
+ pluginsToLoad -= 1;
+ }
+
+ }
+
+ if( pluginsToLoad === 0 ) {
+ loadAsyncDependencies();
}
}
/**
+ * Loads all async reveal.js dependencies.
+ */
+ function loadAsyncDependencies() {
+
+ if( asyncDependencies.length ) {
+ asyncDependencies.forEach( function( s ) {
+ loadScript( s.src, s.callback );
+ } );
+ }
+
+ start();
+
+ }
+
+ /**
* Loads a JavaScript file from the given URL and executes it.
*
* @param {string} url Address of the .js file to load
@@ -1513,6 +1549,15 @@
}
/**
+ * Registers a new plugin with this reveal.js instance.
+ */
+ function registerPlugin( id, plugin ) {
+
+ plugins[id] = plugin;
+
+ }
+
+ /**
* Add a custom key binding with optional description to
* be added to the help screen.
*/
@@ -5845,12 +5890,13 @@
}
},
- // Adds a custom key binding
+ // Adds/remvoes a custom key binding
addKeyBinding: addKeyBinding,
-
- // Removes a custom key binding
removeKeyBinding: removeKeyBinding,
+ // Called by plugins to register/unregister themselves
+ registerPlugin: registerPlugin,
+
// Programatically triggers a keyboard event
triggerKey: function( keyCode ) {
onDocumentKeyDown( { keyCode: keyCode } );