Propagate browser zoom changes to embedded PDFs.

chrome/browser/resources/pdf/viewport.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * Returns the height of the intersection of two rectangles.
  * @param {Object} rect1 the first rect
  * @param {Object} rect2 the second rect
  * @return {number} the height of the intersection of the rects
  */
@@ skipping 36 matching lines @@
 /**
  * Create a new viewport.
  * @constructor
  * @param {Window} window the window
  * @param {Object} sizer is the element which represents the size of the
  *     document in the viewport
  * @param {Function} viewportChangedCallback is run when the viewport changes
  * @param {Function} beforeZoomCallback is run before a change in zoom
  * @param {Function} afterZoomCallback is run after a change in zoom
  * @param {number} scrollbarWidth the width of scrollbars on the page
- * @param {number} defaultZoom The default zoom level.
+ * @param {number} initialZoom The zoom level when the pdf viewer is
+ *     initialized.
  * @param {number} topToolbarHeight The number of pixels that should initially
  *     be left blank above the document for the toolbar.
  */
 function Viewport(window,
                   sizer,
                   viewportChangedCallback,
                   beforeZoomCallback,
                   afterZoomCallback,
                   scrollbarWidth,
-                  defaultZoom,
+                  initialZoom,
                   topToolbarHeight) {
   this.window_ = window;
   this.sizer_ = sizer;
   this.viewportChangedCallback_ = viewportChangedCallback;
   this.beforeZoomCallback_ = beforeZoomCallback;
   this.afterZoomCallback_ = afterZoomCallback;
   this.allowedToChangeZoom_ = false;
   this.zoom_ = 1;
   this.documentDimensions_ = null;
   this.pageDimensions_ = [];
   this.scrollbarWidth_ = scrollbarWidth;
   this.fittingType_ = Viewport.FittingType.NONE;
-  this.defaultZoom_ = defaultZoom;
+  this.initialZoom_ = initialZoom;
   this.topToolbarHeight_ = topToolbarHeight;
   this.prevScale_ = 1;
   this.pinchPhase_ = Viewport.PinchPhase.PINCH_NONE;
   this.pinchPanVector_ = null;
   this.pinchCenter_ = null;
   this.firstPinchCenterInFrame_ = null;
 
   window.addEventListener('scroll', this.updateViewport_.bind(this));
   window.addEventListener('resize', this.resize_.bind(this));
 }
@@ skipping 630 matching lines @@
    * Set the dimensions of the document.
    * @param {Object} documentDimensions the dimensions of the document
    */
   setDocumentDimensions: function(documentDimensions) {
     this.mightZoom_(function() {
       var initialDimensions = !this.documentDimensions_;
       this.documentDimensions_ = documentDimensions;
       this.pageDimensions_ = this.documentDimensions_.pageDimensions;
       if (initialDimensions) {
         this.setZoomInternal_(
-            Math.min(this.defaultZoom_,
+            Math.min(this.initialZoom_,
                      this.computeFittingZoom_(this.documentDimensions_, true)));
         this.position = {
           x: 0,
           y: -this.topToolbarHeight_
         };
       }
       this.contentSizeChanged_();
       this.resize_();
     }.bind(this));
   },
@@ skipping 40 matching lines @@
     spaceOnLeft = Math.max(spaceOnLeft, 0);
 
     return {
       x: x * this.zoom_ + spaceOnLeft - this.window_.pageXOffset,
       y: insetDimensions.y * this.zoom_ - this.window_.pageYOffset,
       width: insetDimensions.width * this.zoom_,
       height: insetDimensions.height * this.zoom_
     };
   }
 };