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diff --git a/layout/generic/test/test_bug507902.html b/layout/generic/test/test_bug507902.html new file mode 100644 index 000000000..efcca8ad7 --- /dev/null +++ b/layout/generic/test/test_bug507902.html @@ -0,0 +1,382 @@ +<!DOCTYPE HTML> +<html> +<!-- +https://bugzilla.mozilla.org/show_bug.cgi?id=507902 +--> +<head> + <title>Test for Bug 507902</title> + <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> +</head> +<body> +<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=507902">Mozilla Bug 507902</a> + +<iframe id="testFrameElem"></iframe> + +<pre id="test"> +<script class="testbody" type="text/javascript"> + +// +// Mochitest to test nsImageFrame icons +// +// The 'loading' icon should be displayed up until we have enough image +// data to determine the frame size. +// +// The 'broken' icon should be displayed when the URL is invalid (either +// a bad server or a file that fails to be sniffed to an appropriate +// mimetype). +// + +// Boilerplate +gWindowUtils = SpecialPowers.getDOMWindowUtils(window); + +// URL + paths +// +// We have a separate copy of the icons in the test directory to +// avoid any firefox caching mechanisms that might affect the +// behavior of the load. +var us = window.location.href; +var baseURL = us.substring(0, us.lastIndexOf('/') + 1); +var loadIconFilename = "file_LoadingImageReference.png"; +var imageFilename = "file_Dolske.png"; +var brokenIconFilename = "file_BrokenImageReference.png"; +var serverFilename = "file_IconTestServer.sjs"; +var serverContinueFlag = "?continue=true"; +var bogusFilename = "oneuponatimewhendolskewasyoung.png"; + +// Our test image element, inside a div, inside an iframe +var testFrameElem = document.getElementById("testFrameElem"); +var innerDoc = testFrameElem.contentWindow.document; +var divContainer = innerDoc.createElement("div"); +divContainer.style.cssFloat = "left"; +innerDoc.body.appendChild(divContainer); +var testImageElem = new Image(); +divContainer.appendChild(testImageElem); +var pingImage = new Image(); + +// Set up the canvases +var canvases = {}; +var canvasNames = [ "brokenIconTest", "brokenIconReference", + "loadingIconTest", "loadingIconReference", + "loadedTest", "loadedReference" ]; +var windowElem = document.documentElement; +for (var i in canvasNames) { + var can = document.createElement("canvas"); + can.setAttribute("width", windowElem.getAttribute("width")); + can.setAttribute("height", windowElem.getAttribute("height")); + canvases[canvasNames[i]] = can; + + // When the image frame has no idea how to size itself, it sizes itself + // to dimensions capable of displaying the alt feedback icons. However, if + // the image has been loaded before, something (I don't know what) seems to + // remember the size of the last successful image for that URL. So when we + // create a new image frame for that URL, it uses that size until it hears + // something different. This happens through a refresh (not sure if this is + // desired behavior). This means that if you refresh the test, the "loading" + // icon for the test image will appear with a border that stretches further + // right and down, because that URL previously displayed an image with larger + // dimensions. This causes the verify stage to fail. To allow for + // successful test refreshes (only useful for people, not automated tests), + // we add a clipping region so that we see the left and top borders, along + // with the image, but not the bottom and right borders. + + if ((i > 1) && (i < 4)) { + var ctx = can.getContext("2d"); + ctx.beginPath(); + ctx.rect(0,0, 30, 30); + ctx.clip(); + } + +} + +// Stage 1 - Load the reference image for the broken icon +function loadBrokenIconReference() { + + // Debugging - Let's see if setting onload after src is a problem + testImageElem.onload = function(event) { dump("test_bug507902.html DEBUG - uh oh, placeholder onload 1 called\n");}; + + // Debug - Figure out if we're getting an onerror instead of onload + testImageElem.onerror = function(event) {dump("test_bug507902.html DEBUG - Got onerror for testImageElem!\n");}; + + testImageElem.src = baseURL + brokenIconFilename; + stageTransition(); +} + +// Stage 2 - Draw the reference image for the broken icon to a canvas +function drawBrokenIconReference() { + + enableBorderAndPad(); + drawWindowToCanvas("brokenIconReference"); + disableBorderAndPad(); + + stageTransition(); +} + +// Stage 3 - Load the reference image for the loading icon +function loadLoadingIconReference() { + + // Debugging - Let's see if setting onload after src is a problem + testImageElem.onload = function(event) { dump("test_bug507902.html DEBUG - uh oh, placeholder onload 3 called\n");}; + + testImageElem.src = baseURL + loadIconFilename; + stageTransition(); +} + +// Stage 4 - Draw the reference image for the loading icon to a canvas +function drawLoadingIconReference() { + + enableBorderAndPad(); + drawWindowToCanvas("loadingIconReference"); + disableBorderAndPad(); + + stageTransition(); +} + +// Stage 5 - Try to load a broken image +function loadBrokenImage() { + resetImage(); + testImageElem.src = baseURL + bogusFilename; + stageTransition(); +} + +// Stage 6 - Draw the screen to a canvas. This should hopefully +// be the broken icon. +function drawBrokenIcon() { + drawWindowToCanvas("brokenIconTest"); + stageTransition(); +} + +// Stage 7 - Load the reference image for the test image +function loadImageReference() { + resetImage(); + + // Debugging - Let's see if setting onload after src is a problem + testImageElem.onload = function(event) { dump("test_bug507902.html DEBUG - uh oh, placeholder onload 7 called\n");}; + + testImageElem.src = baseURL + imageFilename; + stageTransition(); +} + +// Stage 8 - Draw the reference image for the test image to a canvas +function drawImageReference() { + drawWindowToCanvas("loadedReference"); + stageTransition(); +} + +// Stage 9 - Start a load of the test image from the delay-generating server +function startServerLoad() { + + // Reset the image + resetImage(); + + // Debugging info so we can figure out the hang + dump("test_bug507902.html DEBUG - starting server load\n"); + + // Load the image + testImageElem.src = baseURL + serverFilename; + stageTransition(); +} + +// Stage 10 - Draw the screen to a canvas. This should hopefully be the loading +// icon. +function drawLoadingIcon() { + + // Debugging info so we can figure out the hang + dump("test_bug507902.html DEBUG - drawing loading icon\n"); + + drawWindowToCanvas("loadingIconTest"); + stageTransition(); +} + +// Stage 11 - Tell the server to continue. +function signalServerContinue() { + + // Debugging info so we can figure out the hang + dump("test_bug507902.html DEBUG - signaling server to continue\n"); + + pingImage.src = baseURL + serverFilename + serverContinueFlag; + stageTransition(); +} + +// Stage 12 - Draw the screen to a canvas. This should hopefully be the loaded +// test image. +function drawLoadedImage() { + drawWindowToCanvas("loadedTest"); + stageTransition(); +} + + +// Stage 13 - Verify That the appropriate canvases match +function verifyCanvases() { + + // Verify the broken icon + ok(canvasesAreEqual("brokenIconTest", "brokenIconReference"), + "Window drawn on broken load should match broken icon reference"); + + // Verify the loading icon + ok(canvasesAreEqual("loadingIconTest", "loadingIconReference"), + "Window drawn mid-load should match loading icon reference"); + + // Verify the loaded image + ok(canvasesAreEqual("loadedTest", "loadedReference"), + "Window drawn post-load should match reference image"); + + stageTransition(); +} + +// We have a bunch of different things that need to happen in order +// with different transitions. We make a "stage table" here where +// each entry contains the stage function ('fn') and a transition +// ('trans'), which can be one of the following: +// "instant" - Just calls the next stage directly +// "onload" - Sets the next stage as an onload event for the image element +// "onerror" - Sets the next stage as an onerror event for the image element +// integer - Sets the next stage to be called after the given timeout duration +// "finish" - Finish the test +var testStages = [ + { "fn" : loadBrokenIconReference, "trans" : "onload"}, + { "fn" : drawBrokenIconReference, "trans" : "instant"}, + { "fn" : loadLoadingIconReference, "trans" : "onload" }, + { "fn" : drawLoadingIconReference, "trans" : "instant" }, + { "fn" : loadBrokenImage, "trans" : "onerror" }, + { "fn" : drawBrokenIcon, "trans" : "instant" }, + { "fn" : loadImageReference, "trans" : "onload" }, + { "fn" : drawImageReference, "trans" : "instant" }, + // XXXbholley - We use a timeout here because resetting the + // image doesn't seem to be quite synchronous. If we make + // this transition "instant", then the drawImage call draws + // an empty (0,0,0,0) rect to the canvas and we're left with + // whatever was there before. I don't know of any good event + // mechanism to figure out when the image frame is bootstrapped + // enough to display the loading image, so I did trial-and-error + // with timeouts. 50ms seems to be enough time for things to work + // reliably, so *= 6 for good measure. + { "fn" : startServerLoad, "trans" : 300 }, + { "fn" : drawLoadingIcon, "trans" : "instant" }, + { "fn" : signalServerContinue, "trans" : "onload" }, + { "fn" : drawLoadedImage, "trans" : "instant" }, + { "fn" : verifyCanvases, "trans" : "finish" } ]; +var currentStage = 0; + +// Transition function called at the end of each stage +function stageTransition() { + + // Debugging info so we can figure out the hang + dump("test_bug507902.html DEBUG - Current Stage: " + currentStage + "\n"); + + // What's our transition? + var trans = testStages[currentStage++].trans; + + // If the transition is finish, stop now before we access out of bounds + if (trans == "finish") { + makeCanvasesVisible(); // Useful for debugging + SimpleTest.finish(); + return; + } + + // Otherwise, get the next function + var nextfn = testStages[currentStage].fn; + + // Switch based on transition + switch (trans) { + + // Continue right away + case "instant": + nextfn(); + break; + + // Continue after we get an onload event on the test image + case "onload": + testImageElem.onload = function(event) {testImageElem.onload = undefined; nextfn();}; + break; + + // Continue after we get an onerror event on the test image + case "onerror": + testImageElem.onerror = function(event) {testImageElem.onerror = undefined; nextfn();}; + break; + + // Timeout + default: + setTimeout(nextfn, trans); + break + } +} + +// Lots if asynchronous behavior here +SimpleTest.waitForExplicitFinish(); + +// Catch somebody's eye +dump("This test is failing intermittently, see bug 510001 - If you see orange here, please paste the following debugging output on the bug!\n"); + +// Kick off the test by invoking the first stage. The stages call each other +testStages[0].fn(); + + +// We need to get rid of the old image element and make a new one. If we +// don't, the "current/pending" machinery will display the old image until +// the new one is loaded, so we won't see the loading icon. +function resetImage() { + divContainer.removeChild(testImageElem); + testImageElem = null; + testImageElem = new Image(); + divContainer.appendChild(testImageElem); +} + +// +// Makes the canvases visible. Called before the tests finish. This is useful for +// debugging. +// +function makeCanvasesVisible() { + for (var i = 0; i < canvasNames.length - 1; i += 2) { + var title = document.createElement("h3"); + title.innerHTML = canvasNames[i] + ", " + canvasNames[i+1] + ":"; + document.body.appendChild(title); + var myDiv = document.createElement("div"); + myDiv.appendChild(canvases[canvasNames[i]]); + myDiv.appendChild(canvases[canvasNames[i+1]]); + document.body.appendChild(myDiv); + } +} + +// +// Enables and disables bordering/padding to mimic the look of alt feedback icons +// +function enableBorderAndPad() { + divContainer.style.border = "1px"; + divContainer.style.borderStyle = "inset"; + testImageElem.style.padding = "3px"; +} + +function disableBorderAndPad() { + testImageElem.style.padding = 0; + divContainer.style.border = "0px"; + divContainer.style.borderStyle = ""; +} + +// +// Helper canvas methods. This is mostly copped directly from the reftest framework +// + +function drawWindowToCanvas(canvasName) { + var win = testFrameElem.contentWindow; + var ctx = canvases[canvasName].getContext("2d"); + // drawWindow always draws one canvas pixel for each CSS pixel in the source + // window, so scale the drawing to show the zoom (making each canvas pixel be one + // device pixel instead) + ctx.drawWindow(win, win.scrollX, win.scrollY, + Math.ceil(canvases[canvasName].width), + Math.ceil(canvases[canvasName].height), + "rgb(255,255,255)"); +} + +function canvasesAreEqual(canvas1Name, canvas2Name) { + var c1 = canvases[canvas1Name]; + var c2 = canvases[canvas2Name]; + var differences = gWindowUtils.compareCanvases(c1, c2, {}); + return (differences == 0); +} + +</script> +</pre> +</body> +</html> |