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Bug 708683 - Guard more rigorously against bad viewport updates. r=kats a=android-only

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Check more values in browser.js when updating the viewport, and restructure
the JSON conversion in Java so that it's easier to tell what value caused a
bad viewport if it comes from Java.
This commit is contained in:
Chris Lord 2011-12-13 14:12:07 -05:00
parent bc0a27b9bb
commit 9fb06bc547
2 changed files with 17 additions and 17 deletions
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22
mobile/android/base/gfx/ViewportMetrics.java
View File

@ -236,17 +236,17 @@ public class ViewportMetrics {
public String toJSON() {
try {
return new JSONStringer().object()
.key("x").value(mViewportRect.left)
.key("y").value(mViewportRect.top)
.key("width").value(mViewportRect.width())
.key("height").value(mViewportRect.height())
.key("pageWidth").value(mPageSize.width)
.key("pageHeight").value(mPageSize.height)
.key("offsetX").value(mViewportOffset.x)
.key("offsetY").value(mViewportOffset.y)
.key("zoom").value(mZoomFactor)
.endObject().toString();
JSONStringer object = new JSONStringer().object();
object.key("zoom").value(mZoomFactor);
object.key("offsetY").value(mViewportOffset.y);
object.key("offsetX").value(mViewportOffset.x);
object.key("pageHeight").value(mPageSize.height);
object.key("pageWidth").value(mPageSize.width);
object.key("height").value(mViewportRect.height());
object.key("width").value(mViewportRect.width());
object.key("y").value(mViewportRect.top);
object.key("x").value(mViewportRect.left);
return object.endObject().toString();
} catch (JSONException je) {
Log.e(LOGTAG, "Error serializing viewportmetrics", je);
return "";

12
mobile/android/chrome/content/browser.js
View File

@ -1160,10 +1160,10 @@ Tab.prototype = {
get viewport() {
// Update the viewport to current dimensions
this._viewport.x = this.browser.contentWindow.scrollX +
this.viewportExcess.x;
this._viewport.y = this.browser.contentWindow.scrollY +
this.viewportExcess.y;
this._viewport.x = (this.browser.contentWindow.scrollX +
this.viewportExcess.x) || 0;
this._viewport.y = (this.browser.contentWindow.scrollY +
this.viewportExcess.y) || 0;
// Transform coordinates based on zoom
this._viewport.x = Math.round(this._viewport.x * this._viewport.zoom);
@ -1192,8 +1192,8 @@ Tab.prototype = {
updateViewport: function(aReset) {
let win = this.browser.contentWindow;
let zoom = (aReset ? this.getDefaultZoomLevel() : this._viewport.zoom);
let xpos = (aReset ? win.scrollX * zoom : this._viewport.x);
let ypos = (aReset ? win.scrollY * zoom : this._viewport.y);
let xpos = ((aReset && win) ? win.scrollX * zoom : this._viewport.x);
let ypos = ((aReset && win) ? win.scrollY * zoom : this._viewport.y);
this.viewportExcess = { x: 0, y: 0 };
this.viewport = { x: xpos, y: ypos,