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Code Issues Releases Wiki Activity

Add support for onhashchange

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Now we respond dynamically to changes in the location hash in the URL
bar. It means that you can do links in HTML as `<a
href=“#HelloThere”>go</a>` and in Markdown as `[example
link](#HelloThere).`

We still need to make startup.js more modular
This commit is contained in:
Jermolene
2014-05-03 12:20:28 +01:00
parent b2c1331c11
commit 6ccf02ed96
4 changed files with 72 additions and 41 deletions
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core/modules/startup.js
+58 -33
View File
@@ -76,38 +76,8 @@ exports.startup = function() {
});
// Clear outstanding tiddler store change events to avoid an unnecessary refresh cycle at startup
$tw.wiki.clearTiddlerEventQueue();
// Decode the hash portion of our URL
var target,
storyFilter;
if($tw.locationHash.charAt(1) === "!") {
var hash = $tw.locationHash.substr(2),
split = hash.indexOf(":");
if(split === -1) {
target = decodeURIComponent(hash.trim());
} else {
target = decodeURIComponent(hash.substr(0,split - 1).trim());
storyFilter = decodeURIComponent(hash.substr(split + 1).trim());
}
}
// If a target tiddler was specified add it to the history stack
if(target && target !== "") {
// The target tiddler doesn't need double square brackets, but we'll silently remove them if they're present
if(target.indexOf("[[") === 0 && target.substr(-2) === "]]") {
target = target.substr(2,target.length - 4);
}
$tw.wiki.addToHistory(target);
}
// Use the story filter specified in the hash, or the default tiddlers
if(!storyFilter || storyFilter === "") {
storyFilter = $tw.wiki.getTiddlerText(DEFAULT_TIDDLERS_TITLE);
}
var storyList = $tw.wiki.filterTiddlers(storyFilter);
// If the target tiddler isn't included then splice it in at the top
if(target && storyList.indexOf(target) === -1) {
storyList.unshift(target);
}
// Save the story list
$tw.wiki.addTiddler({title: DEFAULT_STORY_TITLE, text: "", list: storyList},$tw.wiki.getModificationFields());
// Open startup tiddlers
openStartupTiddlers();
// Set up the syncer object
$tw.syncer = new $tw.Syncer({wiki: $tw.wiki});
// Host-specific startup
@@ -229,6 +199,13 @@ exports.startup = function() {
updateLocationHash();
}
});
// Listen for changes to the browser location hash
window.addEventListener("hashchange",function() {
if(window.location.hash !== $tw.locationHash) {
$tw.locationHash = window.location.hash;
openStartupTiddlers({defaultToCurrentStory: true});
}
},false)
// Set up the styles
var styleTemplateTitle = "$:/core/ui/PageStylesheet",
styleParser = $tw.wiki.parseTiddler(styleTemplateTitle);
@@ -276,6 +253,51 @@ exports.startup = function() {
}
};
/*
Process the location hash to open the specified tiddlers. Options:
defaultToCurrentStory: If true, the current story is retained as the default, instead of opening the default tiddlers
*/
function openStartupTiddlers(options) {
options = options || {};
// Decode the hash portion of our URL
var target,
storyFilter;
if($tw.locationHash.length > 1) {
var hash = $tw.locationHash.substr(1),
split = hash.indexOf(":");
if(split === -1) {
target = decodeURIComponent(hash.trim());
} else {
target = decodeURIComponent(hash.substr(0,split).trim());
storyFilter = decodeURIComponent(hash.substr(split + 1).trim());
}
}
// If a target tiddler was specified add it to the history stack
if(target && target !== "") {
// The target tiddler doesn't need double square brackets, but we'll silently remove them if they're present
if(target.indexOf("[[") === 0 && target.substr(-2) === "]]") {
target = target.substr(2,target.length - 4);
}
$tw.wiki.addToHistory(target);
}
// Use the story filter specified in the hash, or the default tiddlers
if(!storyFilter || storyFilter === "") {
if(options.defaultToCurrentStory) {
var currStoryList = $tw.wiki.getTiddlerList(DEFAULT_STORY_TITLE);
storyFilter = $tw.utils.stringifyList(currStoryList);
} else {
storyFilter = $tw.wiki.getTiddlerText(DEFAULT_TIDDLERS_TITLE);
}
}
var storyList = $tw.wiki.filterTiddlers(storyFilter);
// If the target tiddler isn't included then splice it in at the top
if(target && storyList.indexOf(target) === -1) {
storyList.unshift(target);
}
// Save the story list
$tw.wiki.addTiddler({title: DEFAULT_STORY_TITLE, text: "", list: storyList},$tw.wiki.getModificationFields());
}
/*
Helper to display the default tiddlers
*/
@@ -299,7 +321,10 @@ function updateLocationHash() {
if(historyList.length > 0) {
targetTiddler = historyList[historyList.length-1].title;
}
location.hash = "#!" + encodeURIComponent(targetTiddler) + ":" + encodeURIComponent($tw.utils.stringifyList(storyList));
$tw.locationHash = "#" + encodeURIComponent(targetTiddler) + ":" + encodeURIComponent($tw.utils.stringifyList(storyList));
if(window.location.hash !== $tw.locationHash) {
window.location.hash = $tw.locationHash;
}
}
/*