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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /image/test/mochitest/imgutils.js
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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diff --git a/image/test/mochitest/imgutils.js b/image/test/mochitest/imgutils.js
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+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+// Helper file for shared image functionality
+//
+// Note that this is use by tests elsewhere in the source tree. When in doubt,
+// check mxr before removing or changing functionality.
+
+// Helper function to clear both the content and chrome image caches
+function clearAllImageCaches()
+{
+ var tools = SpecialPowers.Cc["@mozilla.org/image/tools;1"]
+ .getService(SpecialPowers.Ci.imgITools);
+ var imageCache = tools.getImgCacheForDocument(window.document);
+ imageCache.clearCache(true); // true=chrome
+ imageCache.clearCache(false); // false=content
+}
+
+// Helper function to clear the image cache of content images
+function clearImageCache()
+{
+ var tools = SpecialPowers.Cc["@mozilla.org/image/tools;1"]
+ .getService(SpecialPowers.Ci.imgITools);
+ var imageCache = tools.getImgCacheForDocument(window.document);
+ imageCache.clearCache(false); // true=chrome, false=content
+}
+
+// Helper function to determine if the frame is decoded for a given image id
+function isFrameDecoded(id)
+{
+ return (getImageStatus(id) &
+ SpecialPowers.Ci.imgIRequest.STATUS_FRAME_COMPLETE)
+ ? true : false;
+}
+
+// Helper function to determine if the image is loaded for a given image id
+function isImageLoaded(id)
+{
+ return (getImageStatus(id) &
+ SpecialPowers.Ci.imgIRequest.STATUS_LOAD_COMPLETE)
+ ? true : false;
+}
+
+// Helper function to get the status flags of an image
+function getImageStatus(id)
+{
+ // Get the image
+ var img = SpecialPowers.wrap(document.getElementById(id));
+
+ // QI the image to nsImageLoadingContent
+ img.QueryInterface(SpecialPowers.Ci.nsIImageLoadingContent);
+
+ // Get the request
+ var request = img.getRequest(SpecialPowers.Ci
+ .nsIImageLoadingContent
+ .CURRENT_REQUEST);
+
+ // Return the status
+ return request.imageStatus;
+}
+
+// Forces a synchronous decode of an image by drawing it to a canvas. Only
+// really meaningful if the image is fully loaded first
+function forceDecode(id)
+{
+ // Get the image
+ var img = document.getElementById(id);
+
+ // Make a new canvas
+ var canvas = document.createElement("canvas");
+
+ // Draw the image to the canvas. This forces a synchronous decode
+ var ctx = canvas.getContext("2d");
+ ctx.drawImage(img, 0, 0);
+}
+
+
+// Functions to facilitate getting/setting various image-related prefs
+//
+// If you change a pref in a mochitest, Don't forget to reset it to its
+// original value!
+//
+// Null indicates no pref set
+
+const DISCARD_ENABLED_PREF = {name: "discardable", branch: "image.mem.", type: "bool"};
+const DECODEONDRAW_ENABLED_PREF = {name: "decodeondraw", branch: "image.mem.", type: "bool"};
+const DISCARD_TIMEOUT_PREF = {name: "min_discard_timeout_ms", branch: "image.mem.", type: "int"};
+
+function setImagePref(pref, val)
+{
+ var prefService = SpecialPowers.Cc["@mozilla.org/preferences-service;1"]
+ .getService(SpecialPowers.Ci.nsIPrefService);
+ var branch = prefService.getBranch(pref.branch);
+ if (val != null) {
+ switch(pref.type) {
+ case "bool":
+ branch.setBoolPref(pref.name, val);
+ break;
+ case "int":
+ branch.setIntPref(pref.name, val);
+ break;
+ default:
+ throw new Error("Unknown pref type");
+ }
+ }
+ else if (branch.prefHasUserValue(pref.name))
+ branch.clearUserPref(pref.name);
+}
+
+function getImagePref(pref)
+{
+ var prefService = SpecialPowers.Cc["@mozilla.org/preferences-service;1"]
+ .getService(SpecialPowers.Ci.nsIPrefService);
+ var branch = prefService.getBranch(pref.branch);
+ if (branch.prefHasUserValue(pref.name)) {
+ switch (pref.type) {
+ case "bool":
+ return branch.getBoolPref(pref.name);
+ case "int":
+ return branch.getIntPref(pref.name);
+ default:
+ throw new Error("Unknown pref type");
+ }
+ }
+ else
+ return null;
+}
+
+// JS implementation of imgIScriptedNotificationObserver with stubs for all of its methods.
+function ImageDecoderObserverStub()
+{
+ this.sizeAvailable = function sizeAvailable(aRequest) {}
+ this.frameComplete = function frameComplete(aRequest) {}
+ this.decodeComplete = function decodeComplete(aRequest) {}
+ this.loadComplete = function loadComplete(aRequest) {}
+ this.frameUpdate = function frameUpdate(aRequest) {}
+ this.discard = function discard(aRequest) {}
+ this.isAnimated = function isAnimated(aRequest) {}
+ this.hasTransparency = function hasTransparency(aRequest) {}
+}