Propagate browser zoom changes to embedded PDFs.

chrome/test/data/pdf/zoom_manager_test.js

 // Copyright 2015 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.
 
 chrome.test.runTests(function() {
   'use strict';
 
   class MockViewport {
     constructor() {
       this.zooms = [];
@@ skipping 35 matching lines @@
     complete() {
       this.resolve_();
       this.started = false;
     }
   };
 
   return [
     function testZoomChange() {
       let viewport = new MockViewport();
       let browserZoomSetter = new MockBrowserZoomSetter();
-      let zoomManager = new ZoomManager(
+      let zoomManager = ZoomManager.create(BrowserApi.ZoomBehaviour.MANAGE,

[Sam McNally, 2016/11/18 04:59:23]

Wrap these either
functionName(arg1, arg2,
             arg3, ...)
or
functionName(
    arg1, arg2,
    arg3, ...)

[Kevin McNee, 2016/11/22 23:17:32]

Done.

           viewport, browserZoomSetter.setBrowserZoom.bind(browserZoomSetter),
           1);
       viewport.zoom = 2;
       zoomManager.onPdfZoomChange();
       chrome.test.assertEq(2, browserZoomSetter.zoom);
       chrome.test.assertTrue(browserZoomSetter.started);
       chrome.test.succeed();
     },
 
     function testBrowserZoomChange() {
       let viewport = new MockViewport();
-      let zoomManager = new ZoomManager(viewport, chrome.test.fail, 1);
+      let zoomManager = ZoomManager.create(
+          BrowserApi.ZoomBehaviour.MANAGE, viewport, chrome.test.fail, 1);
       zoomManager.onBrowserZoomChange(3);
       chrome.test.assertEq(1, viewport.zooms.length);
       chrome.test.assertEq(3, viewport.zooms[0]);
       chrome.test.assertEq(3, viewport.zoom);
       chrome.test.succeed();
     },
 
+    function testBrowserZoomChangeEmbedded() {
+      let viewport = new MockViewport();
+      let zoomManager = ZoomManager.create(
+          BrowserApi.ZoomBehaviour.PROPAGATE_PARENT, viewport,
+          function() { return Promise.reject(); }, 1);
+
+      zoomManager.onBrowserZoomChange(2);
+      chrome.test.assertEq(2, viewport.zoom);
+
+      // Zooming in the browser should not overwrite the viewport's zoom,
+      // but cause the viewport to zoom in as well.
+      viewport.zoom = 3;
+      zoomManager.onBrowserZoomChange(3);
+      chrome.test.assertTrue(viewport.zoom > 3);
+
+      chrome.test.succeed();
+    },
+
     function testSmallZoomChange() {
       let viewport = new MockViewport();
       let browserZoomSetter = new MockBrowserZoomSetter();
-      let zoomManager = new ZoomManager(
+      let zoomManager = ZoomManager.create(BrowserApi.ZoomBehaviour.MANAGE,
           viewport, browserZoomSetter.setBrowserZoom.bind(browserZoomSetter),
           2);
       viewport.zoom = 2.0001;
       zoomManager.onPdfZoomChange();
       chrome.test.assertEq(1, browserZoomSetter.zoom);
       chrome.test.assertFalse(browserZoomSetter.started);
       chrome.test.succeed();
     },
 
     function testSmallBrowserZoomChange() {
       let viewport = new MockViewport();
-      let zoomManager = new ZoomManager(viewport, chrome.test.fail, 1);
+      let zoomManager = ZoomManager.create(BrowserApi.ZoomBehaviour.MANAGE,
+          viewport, chrome.test.fail, 1);
       zoomManager.onBrowserZoomChange(0.999);
       chrome.test.assertEq(0, viewport.zooms.length);
       chrome.test.assertEq(1, viewport.zoom);
       chrome.test.succeed();
     },
 
     function testMultiplePdfZoomChanges() {
       let viewport = new MockViewport();
       let browserZoomSetter = new MockBrowserZoomSetter();
-      let zoomManager = new ZoomManager(
+      let zoomManager = ZoomManager.create(BrowserApi.ZoomBehaviour.MANAGE,
           viewport, browserZoomSetter.setBrowserZoom.bind(browserZoomSetter),
           1);
       viewport.zoom = 2;
       zoomManager.onPdfZoomChange();
       viewport.zoom = 3;
       zoomManager.onPdfZoomChange();
       chrome.test.assertTrue(browserZoomSetter.started);
       chrome.test.assertEq(2, browserZoomSetter.zoom);
       browserZoomSetter.complete();
       Promise.resolve().then(function() {
         chrome.test.assertTrue(browserZoomSetter.started);
         chrome.test.assertEq(3, browserZoomSetter.zoom);
         chrome.test.succeed();
       });
     },
 
     function testMultipleBrowserZoomChanges() {
       let viewport = new MockViewport();
-      let zoomManager = new ZoomManager(viewport, chrome.test.fail, 1);
+      let zoomManager = ZoomManager.create(BrowserApi.ZoomBehaviour.MANAGE,
+          viewport, chrome.test.fail, 1);
       zoomManager.onBrowserZoomChange(2);
       zoomManager.onBrowserZoomChange(3);
       chrome.test.assertEq(2, viewport.zooms.length);
       chrome.test.assertEq(2, viewport.zooms[0]);
       chrome.test.assertEq(3, viewport.zooms[1]);
       chrome.test.assertEq(3, viewport.zoom);
       chrome.test.succeed();
     },
   ];
 }());