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Bug 709492 - Part 2: Forward the painting suppression flag from the presentation shell to the Android widget code. r=kats

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This commit is contained in:
Patrick Walton 2012-01-03 22:54:51 -08:00
parent fa1d56ecd7
commit 5d1122e7e9
3 changed files with 41 additions and 7 deletions
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17
mobile/android/chrome/content/browser.js
View File

@ -155,6 +155,21 @@ var Strings = {};
});
});
var MetadataProvider = {
getDrawMetadata: function getDrawMetadata() {
return BrowserApp.getDrawMetadata();
},
paintingSuppressed: function paintingSuppressed() {
let browser = BrowserApp.selectedBrowser;
if (!browser)
return false;
let cwu = browser.contentWindow.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils);
return cwu.paintingSuppressed;
}
};
var BrowserApp = {
_tabs: [],
_selectedTab: null,
@ -169,7 +184,7 @@ var BrowserApp = {
BrowserEventHandler.init();
ViewportHandler.init();
getBridge().setDrawMetadataProvider(this.getDrawMetadata.bind(this));
getBridge().setDrawMetadataProvider(MetadataProvider);
Services.obs.addObserver(this, "Tab:Add", false);
Services.obs.addObserver(this, "Tab:Load", false);

8
widget/android/nsIAndroidBridge.idl
View File

@ -1,8 +1,14 @@
#include "nsISupports.idl"
[scriptable, function, uuid(9feed1e5-bb90-4663-b70a-e03cb27a9e8b)]
[scriptable, uuid(38b5c83a-3e8d-45c2-8311-6e36bd5116c0)]
interface nsIAndroidDrawMetadataProvider : nsISupports {
AString getDrawMetadata();
/*
* Returns true if the presentation shell corresponding to the currently-viewed document is
* suppressing painting (which occurs during page transitions) and false otherwise.
*/
boolean paintingSuppressed();
};
[scriptable, uuid(7dd8441a-4f38-49b2-bd90-da69d02a96cf)]

21
widget/android/nsWindow.cpp
View File

@ -1168,6 +1168,22 @@ nsWindow::OnDraw(AndroidGeckoEvent *ae)
if (gAndroidBounds.width <= 0 || gAndroidBounds.height <= 0)
return;
/*
* Check to see whether the presentation shell corresponding to the document on the screen
* is suppressing painting. If it is, we bail out, as continuing would result in a mismatch
* between the content on the screen and the current viewport metrics.
*/
nsCOMPtr<nsIAndroidDrawMetadataProvider> metadataProvider =
AndroidBridge::Bridge()->GetDrawMetadataProvider();
bool paintingSuppressed = false;
if (metadataProvider) {
metadataProvider->PaintingSuppressed(&paintingSuppressed);
}
if (paintingSuppressed) {
return;
}
AndroidGeckoSoftwareLayerClient &client =
AndroidBridge::Bridge()->GetSoftwareLayerClient();
client.BeginDrawing(gAndroidBounds.width, gAndroidBounds.height);
@ -1207,10 +1223,7 @@ nsWindow::OnDraw(AndroidGeckoEvent *ae)
DrawTo(targetSurface, ae->Rect());
}
{
nsCOMPtr<nsIAndroidDrawMetadataProvider> metadataProvider =
AndroidBridge::Bridge()->GetDrawMetadataProvider();
if (metadataProvider)
if (metadataProvider) {
metadataProvider->GetDrawMetadata(metadata);
}
}