Add the viewer toolbar to the PDF extension

chrome/browser/resources/pdf/index.js

 // Copyright (c) 2012 The Polymer Authors. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //    * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //    * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //    * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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a=this.extends;this.waitingForExtendee(a)||(document.contains(this)?g(function(){this._register(a)}.bind(this)):this._register(a))}},_register:function(a){this.register(this.name,a),e(this.name)},waitingForPrototype:function(a){if(!c(a)){if(l[a]=this,this.hasAttribute("noscript"))if(window.CustomElements&&!CustomElements.useNative)b(a);else{var d=document.createElement("script");d.textContent="Polymer('"+a+"');",this.appendChild(d)}return!0}},waitingForExtendee:function(a){return a&&a.indexOf("-")>=0&&!f(a)?((m[a]=m[a]||[]).push(this),!0):void 0}});Object.keys(i).forEach(function(a){h(j,i[a])});var k={},l={},m={},n={};a.getRegisteredPrototype=c,h(b,a),window.Polymer=b;var o=Platform.deliverDeclarations();if(o)for(var p,q=0,r=o.length;r>q&&(p=o[q]);q++)b.apply(null,p);document.registerElement("polymer-element",{prototype:j})}(Polymer);
-//# sourceMappingURL=polymer.js.map
+//# sourceMappingURL=polymer.js.map;
+
+    Polymer('polymer-selection', {
+      /**
+       * If true, multiple selections are allowed.
+       *
+       * @attribute multi
+       * @type boolean
+       * @default false
+       */
+      multi: false,
+      ready: function() {
+        this.clear();
+      },
+      clear: function() {
+        this.selection = [];
+      },
+      /**
+       * Retrieves the selected item(s).
+       * @method getSelection
+       * @returns Returns the selected item(s). If the multi property is true,
+       * getSelection will return an array, otherwise it will return 
+       * the selected item or undefined if there is no selection.
+      */
+      getSelection: function() {
+        return this.multi ? this.selection : this.selection[0];
+      },
+      /**
+       * Indicates if a given item is selected.
+       * @method isSelected
+       * @param {any} item The item whose selection state should be checked.
+       * @returns Returns true if `item` is selected.
+      */
+      isSelected: function(item) {
+        return this.selection.indexOf(item) >= 0;
+      },
+      setItemSelected: function(item, isSelected) {
+        if (item !== undefined && item !== null) {
+          if (isSelected) {
+            this.selection.push(item);
+          } else {
+            var i = this.selection.indexOf(item);
+            if (i >= 0) {
+              this.selection.splice(i, 1);
+            }
+          }
+          this.fire("polymer-select", {isSelected: isSelected, item: item});
+        }
+      },
+      /**
+       * Set the selection state for a given `item`. If the multi property
+       * is true, then the selected state of `item` will be toggled; otherwise
+       * the `item` will be selected.
+       * @method select
+       * @param {any} item: The item to select.
+      */
+      select: function(item) {
+        if (this.multi) {
+          this.toggle(item);
+        } else if (this.getSelection() !== item) {
+          this.setItemSelected(this.getSelection(), false);
+          this.setItemSelected(item, true);
+        }
+      },
+      /**
+       * Toggles the selection state for `item`.
+       * @method toggle
+       * @param {any} item: The item to toggle.
+      */
+      toggle: function(item) {
+        this.setItemSelected(item, !this.isSelected(item));
+      }
+    });
+  ;
+
+    Polymer('polymer-selector', {
+      /**
+       * Gets or sets the selected element.  Default to use the index
+       * of the item element.
+       *
+       * If you want a specific attribute value of the element to be
+       * used instead of index, set "valueattr" to that attribute name.
+       *
+       * Example:
+       *
+       *     <polymer-selector valueattr="label" selected="foo">
+       *       <div label="foo"></div>
+       *       <div label="bar"></div>
+       *       <div label="zot"></div>
+       *     </polymer-selector>
+       *
+       * In multi-selection this should be an array of values.
+       *
+       * Example:
+       *
+       *     <polymer-selector id="selector" valueattr="label" multi>
+       *       <div label="foo"></div>
+       *       <div label="bar"></div>
+       *       <div label="zot"></div>
+       *     </polymer-selector>
+       *
+       *     this.$.selector.selected = ['foo', 'zot'];
+       *
+       * @attribute selected
+       * @type Object
+       * @default null
+       */
+      selected: null,
+      /**
+       * If true, multiple selections are allowed.
+       *
+       * @attribute multi
+       * @type boolean
+       * @default false
+       */
+      multi: false,
+      /**
+       * Specifies the attribute to be used for "selected" attribute.
+       *
+       * @attribute valueattr
+       * @type string
+       * @default 'name'
+       */
+      valueattr: 'name',
+      /**
+       * Specifies the CSS class to be used to add to the selected element.
+       * 
+       * @attribute selectedClass
+       * @type string
+       * @default 'polymer-selected'
+       */
+      selectedClass: 'polymer-selected',
+      /**
+       * Specifies the property to be used to set on the selected element
+       * to indicate its active state.
+       *
+       * @attribute selectedProperty
+       * @type string
+       * @default 'active'
+       */
+      selectedProperty: 'active',
+      /**
+       * Returns the currently selected element. In multi-selection this returns
+       * an array of selected elements.
+       * 
+       * @attribute selectedItem
+       * @type Object
+       * @default null
+       */
+      selectedItem: null,
+      /**
+       * In single selection, this returns the model associated with the
+       * selected element.
+       * 
+       * @attribute selectedModel
+       * @type Object
+       * @default null
+       */
+      selectedModel: null,
+      /**
+       * In single selection, this returns the selected index.
+       *
+       * @attribute selectedIndex
+       * @type number
+       * @default -1
+       */
+      selectedIndex: -1,
+      /**
+       * The target element that contains items.  If this is not set 
+       * polymer-selector is the container.
+       * 
+       * @attribute target
+       * @type Object
+       * @default null
+       */
+      target: null,
+      /**
+       * This can be used to query nodes from the target node to be used for 
+       * selection items.  Note this only works if the 'target' property is set.
+       *
+       * Example:
+       *
+       *     <polymer-selector target="{{$.myForm}}" itemsSelector="input[type=radio]"></polymer-selector>
+       *     <form id="myForm">
+       *       <label><input type="radio" name="color" value="red"> Red</label> <br>
+       *       <label><input type="radio" name="color" value="green"> Green</label> <br>
+       *       <label><input type="radio" name="color" value="blue"> Blue</label> <br>
+       *       <p>color = {{color}}</p>
+       *     </form>
+       * 
+       * @attribute itemSelector
+       * @type string
+       * @default ''
+       */
+      itemsSelector: '',
+      /**
+       * The event that would be fired from the item element to indicate
+       * it is being selected.
+       *
+       * @attribute activateEvent
+       * @type string
+       * @default 'tap'
+       */
+      activateEvent: 'tap',
+      notap: false,
+      ready: function() {
+        this.activateListener = this.activateHandler.bind(this);
+        this.observer = new MutationObserver(this.updateSelected.bind(this));
+        if (!this.target) {
+          this.target = this;
+        }
+      },
+      get items() {
+        var nodes = this.target !== this ? (this.itemsSelector ? 
+            this.target.querySelectorAll(this.itemsSelector) : 
+                this.target.children) : this.$.items.getDistributedNodes();
+        return Array.prototype.filter.call(nodes || [], function(n) {
+          return n && n.localName !== 'template';
+        });
+      },
+      targetChanged: function(old) {
+        if (old) {
+          this.removeListener(old);
+          this.observer.disconnect();
+        }
+        if (this.target) {
+          this.addListener(this.target);
+          this.observer.observe(this.target, {childList: true});
+        }
+      },
+      addListener: function(node) {
+        node.addEventListener(this.activateEvent, this.activateListener);
+      },
+      removeListener: function(node) {
+        node.removeEventListener(this.activateEvent, this.activateListener);
+      },
+      get selection() {
+        return this.$.selection.getSelection();
+      },
+      selectedChanged: function() {
+        this.updateSelected();
+      },
+      updateSelected: function() {
+        this.validateSelected();
+        if (this.multi) {
+          this.clearSelection();
+          this.selected && this.selected.forEach(function(s) {
+            this.valueToSelection(s);
+          }, this);
+        } else {
+          this.valueToSelection(this.selected);
+        }
+      },
+      validateSelected: function() {
+        // convert to an array for multi-selection
+        if (this.multi && !Array.isArray(this.selected) && 
+            this.selected !== null && this.selected !== undefined) {
+          this.selected = [this.selected];
+        }
+      },
+      clearSelection: function() {
+        if (this.multi) {
+          this.selection.slice().forEach(function(s) {
+            this.$.selection.setItemSelected(s, false);
+          }, this);
+        } else {
+          this.$.selection.setItemSelected(this.selection, false);
+        }
+        this.selectedItem = null;
+        this.$.selection.clear();
+      },
+      valueToSelection: function(value) {
+        var item = (value === null || value === undefined) ? 
+            null : this.items[this.valueToIndex(value)];
+        this.$.selection.select(item);
+      },
+      updateSelectedItem: function() {
+        this.selectedItem = this.selection;
+      },
+      selectedItemChanged: function() {
+        if (this.selectedItem) {
+          var t = this.selectedItem.templateInstance;
+          this.selectedModel = t ? t.model : undefined;
+        } else {
+          this.selectedModel = null;
+        }
+        this.selectedIndex = this.selectedItem ? 
+            parseInt(this.valueToIndex(this.selected)) : -1;
+      },
+      valueToIndex: function(value) {
+        // find an item with value == value and return it's index
+        for (var i=0, items=this.items, c; (c=items[i]); i++) {
+          if (this.valueForNode(c) == value) {
+            return i;
+          }
+        }
+        // if no item found, the value itself is probably the index
+        return value;
+      },
+      valueForNode: function(node) {
+        return node[this.valueattr] || node.getAttribute(this.valueattr);
+      },
+      // events fired from <polymer-selection> object
+      selectionSelect: function(e, detail) {
+        this.updateSelectedItem();
+        if (detail.item) {
+          this.applySelection(detail.item, detail.isSelected)
+        }
+      },
+      applySelection: function(item, isSelected) {
+        if (this.selectedClass) {
+          item.classList.toggle(this.selectedClass, isSelected);
+        }
+        if (this.selectedProperty) {
+          item[this.selectedProperty] = isSelected;
+        }
+      },
+      // event fired from host
+      activateHandler: function(e) {
+        if (!this.notap) {
+          var i = this.findDistributedTarget(e.target, this.items);
+          if (i >= 0) {
+            var item = this.items[i];
+            var s = this.valueForNode(item) || i;
+            if (this.multi) {
+              if (this.selected) {
+                this.addRemoveSelected(s);
+              } else {
+                this.selected = [s];
+              }
+            } else {
+              this.selected = s;
+            }
+            this.asyncFire('polymer-activate', {item: item});
+          }
+        }
+      },
+      addRemoveSelected: function(value) {
+        var i = this.selected.indexOf(value);
+        if (i >= 0) {
+          this.selected.splice(i, 1);
+        } else {
+          this.selected.push(value);
+        }
+        this.valueToSelection(value);
+      },
+      findDistributedTarget: function(target, nodes) {
+        // find first ancestor of target (including itself) that
+        // is in nodes, if any
+        while (target && target != this) {
+          var i = Array.prototype.indexOf.call(nodes, target);
+          if (i >= 0) {
+            return i;
+          }
+          target = target.parentNode;
+        }
+      }
+    });
+  ;
+
+    Polymer('viewer-toolbar', {
+      fadingIn: false,
+      timerId: undefined,
+      ready: function() {
+        this.fadingInChanged();
+      },
+      fadeIn: function() {
+        this.fadingIn = true;
+      },
+      fadeOut: function() {
+        this.fadingIn = false;
+      },
+      fadingInChanged: function() {
+        if (this.fadingIn) {
+          this.style.opacity = 1;
+          if (this.timerId !== undefined) {
+            clearTimeout(this.timerId);
+            this.timerId = undefined;
+          }
+        } else {
+          if (this.timerId === undefined) {
+            this.timerId = setTimeout(
+              function() {
+                this.style.opacity = 0;
+                this.timerId = undefined;
+              }.bind(this), 3000);
+          }
+        }
+      }
+    });
+  ;
+
+    (function() {
+    var dpi = '';
+
+    Polymer('viewer-button', {
+      src: '',
+      latchable: false,
+      ready: function() {
+        if (!dpi) {
+          var mql = window.matchMedia('(-webkit-min-device-pixel-ratio: 1.3');
+          dpi = mql.matches ? 'hi' : 'low';
+        }
+      },
+      srcChanged: function() {
+        if (this.src) {
+          this.$.icon.style.backgroundImage =
+              'url(' + this.getAttribute('assetpath') + 'img/' + dpi +
+                  'DPI/' + this.src + ')';
+        } else {
+          this.$.icon.style.backgroundImage = '';
+        }
+      },
+      latchableChanged: function() {
+        if (this.latchable)
+          this.classList.add('latchable');
+        else
+          this.classList.remove('latchable');
+      },
+    });
+    })();
+