Attachment 221858 Details for Bug 391048 – ios6 bug workaround

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[patch] ios6 bug workaround

ios6_timer.patch (text/plain), 5.47 KB, created by Claudio Guglielmo

on 2012-10-03 13:04:28 EDT

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Filename:

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Creator: Claudio Guglielmo

Created: 2012-10-03 13:04:28 EDT

Size: 5.47 KB

patch

obsolete

>diff --git a/bundles/org.eclipse.rap.rwt/js/qx/client/IOS6TimerPatch.js b/bundles/org.eclipse.rap.rwt/js/qx/client/IOS6TimerPatch.js
>new file mode 100644
>index 0000000..2ff9f36
>--- /dev/null
>+++ b/bundles/org.eclipse.rap.rwt/js/qx/client/IOS6TimerPatch.js
>@@ -0,0 +1,144 @@
>+(function (window) {
>+
>+        // This library re-implements setTimeout, setInterval, clearTimeout, clearInterval for iOS6.
>+        // iOS6 suffers from a bug that kills timers that are created while a page is scrolling.
>+        // This library fixes that problem by recreating timers after scrolling finishes (with interval correction).
>+  	    // This code is free to use by anyone (MIT, blabla).
>+        // Author: rkorving@wizcorp.jp
>+
>+	    var Client = org.eclipse.rwt.Client;
>+		var applyPatch = false;
>+		if(Client.getPlatform() === "ios") {
>+		  if(navigator.appVersion.indexOf("OS 6") > 0) {
>+	        applyPatch = true;
>+		  }
>+	    }
>+
>+        if(!applyPatch) {
>+          return;
>+        }
>+
>+        var timeouts = {};
>+        var intervals = {};
>+        var orgSetTimeout = window.setTimeout;
>+        var orgSetInterval = window.setInterval;
>+        var orgClearTimeout = window.clearTimeout;
>+        var orgClearInterval = window.clearInterval;
>+
>+
>+        function createTimer(set, map, args) {
>+                var id, cb = args[0], repeat = (set === orgSetInterval);
>+
>+                function callback() {
>+                        if (cb) {
>+                                cb.apply(window, arguments);
>+
>+                                if (!repeat) {
>+                                        delete map[id];
>+                                        cb = null;
>+                                }
>+                        }
>+                }
>+
>+                args[0] = callback;
>+
>+                id = set.apply(window, args);
>+
>+                map[id] = { args: args, created: Date.now(), cb: cb, id: id };
>+
>+                return id;
>+        }
>+
>+
>+        function resetTimer(set, clear, map, virtualId, correctInterval) {
>+                var timer = map[virtualId];
>+
>+                if (!timer) {
>+                        return;
>+                }
>+
>+                var repeat = (set === orgSetInterval);
>+
>+                // cleanup
>+
>+                clear(timer.id);
>+
>+                // reduce the interval (arg 1 in the args array)
>+
>+                if (!repeat) {
>+                        var interval = timer.args[1];
>+
>+                        var reduction = Date.now() - timer.created;
>+                        if (reduction < 0) {
>+                                reduction = 0;
>+                        }
>+
>+                        interval -= reduction;
>+                        if (interval < 0) {
>+                                interval = 0;
>+                        }
>+
>+                        timer.args[1] = interval;
>+                }
>+
>+                // recreate
>+
>+                function callback() {
>+                        if (timer.cb) {
>+                                timer.cb.apply(window, arguments);
>+                                if (!repeat) {
>+                                        delete map[virtualId];
>+                                        timer.cb = null;
>+                                }
>+                        }
>+                }
>+
>+                timer.args[0] = callback;
>+                timer.created = Date.now();
>+                timer.id = set.apply(window, timer.args);
>+        }
>+
>+
>+        window.setTimeout = function () {
>+                return createTimer(orgSetTimeout, timeouts, arguments);
>+        };
>+
>+
>+        window.setInterval = function () {
>+                return createTimer(orgSetInterval, intervals, arguments);
>+        };
>+
>+        window.clearTimeout = function (id) {
>+                var timer = timeouts[id];
>+
>+                if (timer) {
>+                        delete timeouts[id];
>+                        orgClearTimeout(timer.id);
>+                }
>+        };
>+
>+        window.clearInterval = function (id) {
>+                var timer = intervals[id];
>+
>+                if (timer) {
>+                        delete intervals[id];
>+                        orgClearInterval(timer.id);
>+                }
>+        };
>+
>+        window.addEventListener('scroll', function () {
>+                // recreate the timers using adjusted intervals
>+                // we cannot know how long the scroll-freeze lasted, so we cannot take that into account
>+
>+                var virtualId;
>+
>+                for (virtualId in timeouts) {
>+                        resetTimer(orgSetTimeout, orgClearTimeout, timeouts, virtualId);
>+                }
>+
>+                for (virtualId in intervals) {
>+                        resetTimer(orgSetInterval, orgClearInterval, intervals, virtualId);
>+                }
>+        });
>+
>+}(window));
>\ No newline at end of file
>diff --git a/bundles/org.eclipse.rap.rwt/widgetkits/org/eclipse/swt/internal/widgets/displaykit/ClientResources.java b/bundles/org.eclipse.rap.rwt/widgetkits/org/eclipse/swt/internal/widgets/displaykit/ClientResources.java
>index 0edb656..55810df 100644
>--- a/bundles/org.eclipse.rap.rwt/widgetkits/org/eclipse/swt/internal/widgets/displaykit/ClientResources.java
>+++ b/bundles/org.eclipse.rap.rwt/widgetkits/org/eclipse/swt/internal/widgets/displaykit/ClientResources.java
>@@ -57,6 +57,7 @@
>     "qx/event/type/DataEvent.js",
>     "qx/event/type/ChangeEvent.js",
>     "qx/client/Timer.js",
>+    "qx/client/IOS6TimerPatch.js",
>     "qx/html/String.js",
>     "qx/dom/String.js",
>     "qx/html/Entity.js",

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Attachments on bug 391048: 221858