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Code Issues Releases Wiki Activity

Refactor browser unload task handling

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Make it possible to register multiple task functions that will be
called when the window is unloaded
This commit is contained in:
Jermolene 2015-05-03 16:23:35 +01:00
parent d23f174d01
commit 48dcf959ff
3 changed files with 29 additions and 5 deletions
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26
boot/boot.js
View File

@ -1738,7 +1738,8 @@ $tw.boot.startup = function(options) {
languagesEnvVar: "TIDDLYWIKI_LANGUAGE_PATH",
editionsEnvVar: "TIDDLYWIKI_EDITION_PATH"
},
log: {} // Log flags
log: {}, // Log flags
unloadTasks: []
});
if(!$tw.boot.tasks.readBrowserTiddlers) {
// For writable tiddler files, a hashmap of title to {filepath:,type:,hasMetaFile:}
@ -1797,6 +1798,20 @@ $tw.boot.startup = function(options) {
// Install the tiddler deserializer modules
$tw.Wiki.tiddlerDeserializerModules = Object.create(null);
$tw.modules.applyMethods("tiddlerdeserializer",$tw.Wiki.tiddlerDeserializerModules);
// Call unload handlers in the browser
if($tw.browser) {
window.onbeforeunload = function(event) {
event = event || {};
var result;
$tw.utils.each($tw.unloadTasks,function(task) {
var r = task(event);
if(r) {
result = r;
}
});
return result;
}
}
// Load tiddlers
if($tw.boot.tasks.readBrowserTiddlers) {
$tw.loadTiddlersBrowser();
@ -1833,6 +1848,15 @@ $tw.boot.startup = function(options) {
$tw.boot.executeNextStartupTask();
};
/*
Add another unload task
*/
$tw.addUnloadTask = function(task) {
if($tw.unloadTasks.indexOf(task) === -1) {
$tw.unloadTasks.push(task);
}
}
/*
Execute the remaining eligible startup tasks
*/

4
core/modules/saver-handler.js
View File

@ -75,14 +75,14 @@ function SaverHandler(options) {
}
});
// Set up our beforeunload handler
window.onbeforeunload = function(event) {
$tw.addUnloadTask(function(event) {
var confirmationMessage;
if(self.isDirty()) {
confirmationMessage = $tw.language.getString("UnsavedChangesWarning");
event.returnValue = confirmationMessage; // Gecko
}
return confirmationMessage;
};
});
}
// Install the save action handlers
if($tw.browser) {

4
core/modules/syncer.js
View File

@ -39,14 +39,14 @@ function Syncer(options) {
// Browser event handlers
if($tw.browser) {
// Set up our beforeunload handler
window.onbeforeunload = function(event) {
$tw.addUnloadTask(function(event) {
var confirmationMessage;
if(self.isDirty()) {
confirmationMessage = $tw.language.getString("UnsavedChangesWarning");
event.returnValue = confirmationMessage; // Gecko
}
return confirmationMessage;
};
});
// Listen out for login/logout/refresh events in the browser
$tw.rootWidget.addEventListener("tm-login",function() {
self.handleLoginEvent();