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Unified Diff: Source/web/tests/DocumentLoadingRenderingTest.cpp

Issue 1329553004: Add a FOUC painting test. (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Clean up. Created 5 years, 3 months ago
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Index: Source/web/tests/DocumentLoadingRenderingTest.cpp
diff --git a/Source/web/tests/DocumentLoadingRenderingTest.cpp b/Source/web/tests/DocumentLoadingRenderingTest.cpp
index 0f64c43a4e6c29fb8d459d5e6c755a7a834b3812..c06e688b27edfa26eedd8d8bc3f3709726231dbc 100644
--- a/Source/web/tests/DocumentLoadingRenderingTest.cpp
+++ b/Source/web/tests/DocumentLoadingRenderingTest.cpp
@@ -5,8 +5,10 @@
#include "config.h"
#include "core/dom/Document.h"
+#include "core/frame/FrameView.h"
#include "web/WebLocalFrameImpl.h"
#include "web/tests/FrameTestHelpers.h"
+#include "web/tests/sim/SimCompositor.h"
#include "web/tests/sim/SimLayerTreeView.h"
#include "web/tests/sim/SimNetwork.h"
#include "web/tests/sim/SimRequest.h"
@@ -19,8 +21,10 @@ class DocumentLoadingRenderingTest : public ::testing::Test {
protected:
DocumentLoadingRenderingTest()
: m_webViewClient(m_layerTreeView)
+ , m_compositor(m_layerTreeView)
{
m_webViewHelper.initialize(true, nullptr, &m_webViewClient);
+ m_compositor.setWebViewImpl(webView());
Document::setThreadedParsingEnabledForUnitTestsOnly(false);
}
@@ -34,12 +38,18 @@ protected:
WebURLRequest request;
request.initialize();
request.setURL(KURL(ParsedURLString, url));
- m_webViewHelper.webViewImpl()->mainFrameImpl()->loadRequest(request);
+ webView().mainFrameImpl()->loadRequest(request);
+ }
+
+ WebViewImpl& webView()
+ {
+ return *m_webViewHelper.webViewImpl();
}
SimNetwork m_network;
SimLayerTreeView m_layerTreeView;
SimWebViewClient m_webViewClient;
+ SimCompositor m_compositor;
FrameTestHelpers::WebViewHelper m_webViewHelper;
};
@@ -160,4 +170,71 @@ TEST_F(DocumentLoadingRenderingTest, ShouldResumeCommitsAfterParsingSvg)
EXPECT_FALSE(m_layerTreeView.deferCommits());
}
+TEST_F(DocumentLoadingRenderingTest, ShouldNotPaintIframeContentWithPendingSheets)
+{
+ SimRequest mainResource("https://example.com/test.html", "text/html");
+ SimRequest frameResource("https://example.com/frame.html", "text/html");
+ SimRequest cssResource("https://example.com/test.css", "text/css");
+
+ loadURL("https://example.com/test.html");
+
+ webView().resize(WebSize(800, 600));
+
+ mainResource.start();
+ mainResource.write(
+ "<!DOCTYPE html>"
+ "<iframe src=frame.html></iframe>"
+ "<p style='transform: translateZ(0)'>Hello World</p>"
+ );
+ mainResource.finish();
+
+ // Main page is ready to begin painting as there's no pending sheets.
+ // The frame is not yet loaded, so we only paint the top level page.
+ SimCompositor::BeginFrameResult frame1 = m_compositor.beginFrame();
+ EXPECT_TRUE(frame1.didDrawText);
+
+ frameResource.start();
+ frameResource.write(
+ "<!DOCTYPE html>"
+ "<style>html { background: pink }</style>"
+ "<link rel=stylesheet href=test.css>"
+ "<p style='background: yellow'>Hello World</p>"
+ "<div style='transform: translateZ(0); background: green;'>"
+ " <p style='background: blue'>Hello Layer</p>"
+ " <div style='position: relative; background: red;'>Hello World</div>"
+ "</div>"
+ );
+ frameResource.finish();
+
+ // Trigger a layout with pending sheets. For example a page could trigger this
+ // by doing offsetTop in a setTimeout, or by a parent frame executing script
+ // that touched offsetTop in the child frame.
+ LocalFrame* childFrame = toLocalFrame(webView().mainFrameImpl()->frame()->tree().firstChild());
+ childFrame->document()->updateLayoutIgnorePendingStylesheets();
+
+ SimCompositor::BeginFrameResult frame2 = m_compositor.beginFrame();
+
+ // The child frame still has pending sheets, and the parent frame has no
+ // invalid paint so we shouldn't draw any text.
+ EXPECT_FALSE(frame2.didDrawText);
+
+ // One per DeprecatedPaintLayer, 2 in the main frame and 3 in the iframe = 5.
+ // 1 for the background of the iframe.
+ // 1 for the background of the composited transform layer.
+ // TODO(esprehn): Why FOUC the background (borders, etc.) of iframes and
+ // composited layers? Seems like a bug.
+ EXPECT_EQ(7, frame2.drawCount);
+
+ // Finish loading the sheets in the child frame. After it should issue a
+ // paint invalidation for every layer since frame2 painted them but skipped
+ // painting the real content to avoid FOUC.
+ cssResource.start();
+ cssResource.finish();
+
+ // First frame where all frames are loaded, should paint the text in the
+ // child frame.
+ SimCompositor::BeginFrameResult frame3 = m_compositor.beginFrame();
+ EXPECT_TRUE(frame3.didDrawText);
+}
+
} // namespace blink

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