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Bug 480595: Do not show navbar on zoomToElement r=gavin

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This commit is contained in:
Taras Glek 2009-03-03 15:54:27 -08:00
parent c081943e62
commit cdf9a72c91
1 changed files with 13 additions and 7 deletions
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20
mobile/chrome/content/CanvasBrowser.js
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@ -399,18 +399,24 @@ CanvasBrowser.prototype = {
zoomToElement: function(aElement) {
const margin = 15;
// scale to the element's width
let [canvasW, ] = this.canvasDimensions;
let elRect = this._getPagePosition(aElement);
let zoomLevel = canvasW / (elRect.width + (2 * margin));
let elWidth = elRect.width;
let visibleViewportWidth = this._pageToScreen(this._visibleBounds.width);
/* Try to set zoom-level such that once zoomed element is as wide
* as the visible viewport */
let zoomLevel = visibleViewportWidth / (elWidth + (2 * margin));
ws.beginUpdateBatch();
this.zoomLevel = Math.min(zoomLevel, 10);
this.zoomLevel = zoomLevel;
/* If zoomLevel ends up clamped to less than asked for, calculate
* how many more screen pixels will fit horizontally in addition to
* element's width. This ensures that more of the webpage is
* showing instead of the navbar. Bug 480595. */
let xpadding = Math.max(margin, visibleViewportWidth - this._pageToScreen(elWidth));
// pan to the element
ws.panTo(Math.floor(Math.max(this._pageToScreen(elRect.x) - margin, 0)),
ws.panTo(Math.floor(Math.max(this._pageToScreen(elRect.x) - xpadding, 0)),
Math.floor(Math.max(this._pageToScreen(elRect.y) - margin, 0)));
ws.endUpdateBatch();