chrome/browser/resources/options/chromeos/display_options.js

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 cr.exportPath('options');
   6
   7 /**
   8  * @typedef {{
   9  *   availableColorProfiles: Array.<{profileId: number, name: string}>,
  10  *   colorProfile: number,
  11  *   height: number,
  12  *   id: string,
  13  *   isInternal: boolean,
  14  *   isPrimary: boolean,
  15  *   resolutions: Array.<{width: number, height: number, originalWidth: number,
  16  *       originalHeight: number, deviceScaleFactor: number, scale: number,
  17  *       refreshRate: number, isBest: boolean, selected: boolean}>,
  18  *   name: string,
  19  *   orientation: number,
  20  *   width: number,
  21  *   x: number,
  22  *   y: number
  23  * }}
  24  */
  25 options.DisplayInfo;
  26
  27 /**
  28  * Enumeration of secondary display layout.  The value has to be same as the
  29  * values in ash/display/display_controller.cc.
  30  * @enum {number}
  31  */
  32 options.SecondaryDisplayLayout = {
  33   TOP: 0,
  34   RIGHT: 1,
  35   BOTTOM: 2,
  36   LEFT: 3
  37 };
  38
  39 cr.define('options', function() {
  40   var Page = cr.ui.pageManager.Page;
  41   var PageManager = cr.ui.pageManager.PageManager;
  42
  43   // The scale ratio of the display rectangle to its original size.
  44   /** @const */ var VISUAL_SCALE = 1 / 10;
  45
  46   // The number of pixels to share the edges between displays.
  47   /** @const */ var MIN_OFFSET_OVERLAP = 5;
  48
  49   /**
  50    * Calculates the bounds of |element| relative to the page.
  51    * @param {HTMLElement} element The element to be known.
  52    * @return {Object} The object for the bounds, with x, y, width, and height.
  53    */
  54   function getBoundsInPage(element) {
  55     var bounds = {
  56       x: element.offsetLeft,
  57       y: element.offsetTop,
  58       width: element.offsetWidth,
  59       height: element.offsetHeight
  60     };
  61     var parent = element.offsetParent;
  62     while (parent && parent != document.body) {
  63       bounds.x += parent.offsetLeft;
  64       bounds.y += parent.offsetTop;
  65       parent = parent.offsetParent;
  66     }
  67     return bounds;
  68   }
  69
  70   /**
  71    * Gets the position of |point| to |rect|, left, right, top, or bottom.
  72    * @param {Object} rect The base rectangle with x, y, width, and height.
  73    * @param {Object} point The point to check the position.
  74    * @return {options.SecondaryDisplayLayout} The position of the calculated
  75    *     point.
  76    */
  77   function getPositionToRectangle(rect, point) {
  78     // Separates the area into four (LEFT/RIGHT/TOP/BOTTOM) by the diagonals of
  79     // the rect, and decides which area the display should reside.
  80     var diagonalSlope = rect.height / rect.width;
  81     var topDownIntercept = rect.y - rect.x * diagonalSlope;
  82     var bottomUpIntercept = rect.y + rect.height + rect.x * diagonalSlope;
  83
  84     if (point.y > topDownIntercept + point.x * diagonalSlope) {
  85       if (point.y > bottomUpIntercept - point.x * diagonalSlope)
  86         return options.SecondaryDisplayLayout.BOTTOM;
  87       else
  88         return options.SecondaryDisplayLayout.LEFT;
  89     } else {
  90       if (point.y > bottomUpIntercept - point.x * diagonalSlope)
  91         return options.SecondaryDisplayLayout.RIGHT;
  92       else
  93         return options.SecondaryDisplayLayout.TOP;
  94     }
  95   }
  96
  97   /**
  98    * Encapsulated handling of the 'Display' page.
  99    * @constructor
 100    * @extends {cr.ui.pageManager.Page}
 101    */
 102   function DisplayOptions() {
 103     Page.call(this, 'display',
 104               loadTimeData.getString('displayOptionsPageTabTitle'),
 105               'display-options-page');
 106   }
 107
 108   cr.addSingletonGetter(DisplayOptions);
 109
 110   DisplayOptions.prototype = {
 111     __proto__: Page.prototype,
 112
 113     /**
 114      * Whether the current output status is mirroring displays or not.
 115      * @private
 116      */
 117     mirroring_: false,
 118
 119     /**
 120      * The current secondary display layout.
 121      * @private
 122      */
 123     layout_: options.SecondaryDisplayLayout.RIGHT,
 124
 125     /**
 126      * The array of current output displays.  It also contains the display
 127      * rectangles currently rendered on screen.
 128      * @type {Array.<options.DisplayInfo>}
 129      * @private
 130      */
 131     displays_: [],
 132
 133     /**
 134      * The index for the currently focused display in the options UI.  null if
 135      * no one has focus.
 136      * @private
 137      */
 138     focusedIndex_: null,
 139
 140     /**
 141      * The primary display.
 142      * @private
 143      */
 144     primaryDisplay_: null,
 145
 146     /**
 147      * The secondary display.
 148      * @private
 149      */
 150     secondaryDisplay_: null,
 151
 152     /**
 153      * The container div element which contains all of the display rectangles.
 154      * @private
 155      */
 156     displaysView_: null,
 157
 158     /**
 159      * The scale factor of the actual display size to the drawn display
 160      * rectangle size.
 161      * @private
 162      */
 163     visualScale_: VISUAL_SCALE,
 164
 165     /**
 166      * The location where the last touch event happened.  This is used to
 167      * prevent unnecessary dragging events happen.  Set to null unless it's
 168      * during touch events.
 169      * @private
 170      */
 171     lastTouchLocation_: null,
 172
 173     /** @override */
 174     initializePage: function() {
 175       Page.prototype.initializePage.call(this);
 176
 177       $('display-options-toggle-mirroring').onclick = (function() {
 178         this.mirroring_ = !this.mirroring_;
 179         chrome.send('setMirroring', [this.mirroring_]);
 180       }).bind(this);
 181
 182       var container = $('display-options-displays-view-host');
 183       container.onmousemove = this.onMouseMove_.bind(this);
 184       window.addEventListener('mouseup', this.endDragging_.bind(this), true);
 185       container.ontouchmove = this.onTouchMove_.bind(this);
 186       container.ontouchend = this.endDragging_.bind(this);
 187
 188       $('display-options-set-primary').onclick = (function() {
 189         chrome.send('setPrimary', [this.displays_[this.focusedIndex_].id]);
 190       }).bind(this);
 191       $('display-options-resolution-selection').onchange = (function(ev) {
 192         var display = this.displays_[this.focusedIndex_];
 193         var resolution = display.resolutions[ev.target.value];
 194         chrome.send('setDisplayMode', [display.id, resolution]);
 195       }).bind(this);
 196       $('display-options-orientation-selection').onchange = (function(ev) {
 197         chrome.send('setOrientation', [this.displays_[this.focusedIndex_].id,
 198                                        ev.target.value]);
 199       }).bind(this);
 200       $('display-options-color-profile-selection').onchange = (function(ev) {
 201         chrome.send('setColorProfile', [this.displays_[this.focusedIndex_].id,
 202                                         ev.target.value]);
 203       }).bind(this);
 204       $('selected-display-start-calibrating-overscan').onclick = (function() {
 205         // Passes the target display ID. Do not specify it through URL hash,
 206         // we do not care back/forward.
 207         var displayOverscan = options.DisplayOverscan.getInstance();
 208         displayOverscan.setDisplayId(this.displays_[this.focusedIndex_].id);
 209         PageManager.showPageByName('displayOverscan');
 210         chrome.send('coreOptionsUserMetricsAction',
 211                     ['Options_DisplaySetOverscan']);
 212       }).bind(this);
 213     },
 214
 215     /** @override */
 216     didShowPage: function() {
 217       var optionTitles = document.getElementsByClassName(
 218           'selected-display-option-title');
 219       var maxSize = 0;
 220       for (var i = 0; i < optionTitles.length; i++)
 221         maxSize = Math.max(maxSize, optionTitles[i].clientWidth);
 222       for (var i = 0; i < optionTitles.length; i++)
 223         optionTitles[i].style.width = maxSize + 'px';
 224       chrome.send('getDisplayInfo');
 225     },
 226
 227     /**
 228      * Mouse move handler for dragging display rectangle.
 229      * @param {Event} e The mouse move event.
 230      * @private
 231      */
 232     onMouseMove_: function(e) {
 233       return this.processDragging_(e, {x: e.pageX, y: e.pageY});
 234     },
 235
 236     /**
 237      * Touch move handler for dragging display rectangle.
 238      * @param {Event} e The touch move event.
 239      * @private
 240      */
 241     onTouchMove_: function(e) {
 242       if (e.touches.length != 1)
 243         return true;
 244
 245       var touchLocation = {x: e.touches[0].pageX, y: e.touches[0].pageY};
 246       // Touch move events happen even if the touch location doesn't change, but
 247       // it doesn't need to process the dragging.  Since sometimes the touch
 248       // position changes slightly even though the user doesn't think to move
 249       // the finger, very small move is just ignored.
 250       /** @const */ var IGNORABLE_TOUCH_MOVE_PX = 1;
 251       var xDiff = Math.abs(touchLocation.x - this.lastTouchLocation_.x);
 252       var yDiff = Math.abs(touchLocation.y - this.lastTouchLocation_.y);
 253       if (xDiff <= IGNORABLE_TOUCH_MOVE_PX &&
 254           yDiff <= IGNORABLE_TOUCH_MOVE_PX) {
 255         return true;
 256       }
 257
 258       this.lastTouchLocation_ = touchLocation;
 259       return this.processDragging_(e, touchLocation);
 260     },
 261
 262     /**
 263      * Mouse down handler for dragging display rectangle.
 264      * @param {Event} e The mouse down event.
 265      * @private
 266      */
 267     onMouseDown_: function(e) {
 268       if (this.mirroring_)
 269         return true;
 270
 271       if (e.button != 0)
 272         return true;
 273
 274       e.preventDefault();
 275       var target = assertInstanceof(e.target, HTMLElement);
 276       return this.startDragging_(target, {x: e.pageX, y: e.pageY});
 277     },
 278
 279     /**
 280      * Touch start handler for dragging display rectangle.
 281      * @param {Event} e The touch start event.
 282      * @private
 283      */
 284     onTouchStart_: function(e) {
 285       if (this.mirroring_)
 286         return true;
 287
 288       if (e.touches.length != 1)
 289         return false;
 290
 291       e.preventDefault();
 292       var touch = e.touches[0];
 293       this.lastTouchLocation_ = {x: touch.pageX, y: touch.pageY};
 294       var target = assertInstanceof(e.target, HTMLElement);
 295       return this.startDragging_(target, this.lastTouchLocation_);
 296     },
 297
 298     /**
 299      * Collects the current data and sends it to Chrome.
 300      * @private
 301      */
 302     applyResult_: function() {
 303       // Offset is calculated from top or left edge.
 304       var primary = this.primaryDisplay_;
 305       var secondary = this.secondaryDisplay_;
 306       var offset;
 307       if (this.layout_ == options.SecondaryDisplayLayout.LEFT ||
 308           this.layout_ == options.SecondaryDisplayLayout.RIGHT) {
 309         offset = secondary.div.offsetTop - primary.div.offsetTop;
 310       } else {
 311         offset = secondary.div.offsetLeft - primary.div.offsetLeft;
 312       }
 313       chrome.send('setDisplayLayout',
 314                   [this.layout_, offset / this.visualScale_]);
 315     },
 316
 317     /**
 318      * Snaps the region [point, width] to [basePoint, baseWidth] if
 319      * the [point, width] is close enough to the base's edge.
 320      * @param {number} point The starting point of the region.
 321      * @param {number} width The width of the region.
 322      * @param {number} basePoint The starting point of the base region.
 323      * @param {number} baseWidth The width of the base region.
 324      * @return {number} The moved point.  Returns point itself if it doesn't
 325      *     need to snap to the edge.
 326      * @private
 327      */
 328     snapToEdge_: function(point, width, basePoint, baseWidth) {
 329       // If the edge of the regions is smaller than this, it will snap to the
 330       // base's edge.
 331       /** @const */ var SNAP_DISTANCE_PX = 16;
 332
 333       var startDiff = Math.abs(point - basePoint);
 334       var endDiff = Math.abs(point + width - (basePoint + baseWidth));
 335       // Prefer the closer one if both edges are close enough.
 336       if (startDiff < SNAP_DISTANCE_PX && startDiff < endDiff)
 337         return basePoint;
 338       else if (endDiff < SNAP_DISTANCE_PX)
 339         return basePoint + baseWidth - width;
 340
 341       return point;
 342     },
 343
 344     /**
 345      * Processes the actual dragging of display rectangle.
 346      * @param {Event} e The event which triggers this drag.
 347      * @param {Object} eventLocation The location where the event happens.
 348      * @private
 349      */
 350     processDragging_: function(e, eventLocation) {
 351       if (!this.dragging_)
 352         return true;
 353
 354       var index = -1;
 355       for (var i = 0; i < this.displays_.length; i++) {
 356         if (this.displays_[i] == this.dragging_.display) {
 357           index = i;
 358           break;
 359         }
 360       }
 361       if (index < 0)
 362         return true;
 363
 364       e.preventDefault();
 365
 366       // Note that current code of moving display-rectangles doesn't work
 367       // if there are >=3 displays.  This is our assumption for M21.
 368       // TODO(mukai): Fix the code to allow >=3 displays.
 369       var newPosition = {
 370         x: this.dragging_.originalLocation.x +
 371             (eventLocation.x - this.dragging_.eventLocation.x),
 372         y: this.dragging_.originalLocation.y +
 373             (eventLocation.y - this.dragging_.eventLocation.y)
 374       };
 375
 376       var baseDiv = this.dragging_.display.isPrimary ?
 377           this.secondaryDisplay_.div : this.primaryDisplay_.div;
 378       var draggingDiv = this.dragging_.display.div;
 379
 380       newPosition.x = this.snapToEdge_(newPosition.x, draggingDiv.offsetWidth,
 381                                        baseDiv.offsetLeft, baseDiv.offsetWidth);
 382       newPosition.y = this.snapToEdge_(newPosition.y, draggingDiv.offsetHeight,
 383                                        baseDiv.offsetTop, baseDiv.offsetHeight);
 384
 385       var newCenter = {
 386         x: newPosition.x + draggingDiv.offsetWidth / 2,
 387         y: newPosition.y + draggingDiv.offsetHeight / 2
 388       };
 389
 390       var baseBounds = {
 391         x: baseDiv.offsetLeft,
 392         y: baseDiv.offsetTop,
 393         width: baseDiv.offsetWidth,
 394         height: baseDiv.offsetHeight
 395       };
 396       switch (getPositionToRectangle(baseBounds, newCenter)) {
 397         case options.SecondaryDisplayLayout.RIGHT:
 398           this.layout_ = this.dragging_.display.isPrimary ?
 399               options.SecondaryDisplayLayout.LEFT :
 400               options.SecondaryDisplayLayout.RIGHT;
 401           break;
 402         case options.SecondaryDisplayLayout.LEFT:
 403           this.layout_ = this.dragging_.display.isPrimary ?
 404               options.SecondaryDisplayLayout.RIGHT :
 405               options.SecondaryDisplayLayout.LEFT;
 406           break;
 407         case options.SecondaryDisplayLayout.TOP:
 408           this.layout_ = this.dragging_.display.isPrimary ?
 409               options.SecondaryDisplayLayout.BOTTOM :
 410               options.SecondaryDisplayLayout.TOP;
 411           break;
 412         case options.SecondaryDisplayLayout.BOTTOM:
 413           this.layout_ = this.dragging_.display.isPrimary ?
 414               options.SecondaryDisplayLayout.TOP :
 415               options.SecondaryDisplayLayout.BOTTOM;
 416           break;
 417       }
 418
 419       if (this.layout_ == options.SecondaryDisplayLayout.LEFT ||
 420           this.layout_ == options.SecondaryDisplayLayout.RIGHT) {
 421         if (newPosition.y > baseDiv.offsetTop + baseDiv.offsetHeight)
 422           this.layout_ = this.dragging_.display.isPrimary ?
 423               options.SecondaryDisplayLayout.TOP :
 424               options.SecondaryDisplayLayout.BOTTOM;
 425         else if (newPosition.y + draggingDiv.offsetHeight <
 426                  baseDiv.offsetTop)
 427           this.layout_ = this.dragging_.display.isPrimary ?
 428               options.SecondaryDisplayLayout.BOTTOM :
 429               options.SecondaryDisplayLayout.TOP;
 430       } else {
 431         if (newPosition.x > baseDiv.offsetLeft + baseDiv.offsetWidth)
 432           this.layout_ = this.dragging_.display.isPrimary ?
 433               options.SecondaryDisplayLayout.LEFT :
 434               options.SecondaryDisplayLayout.RIGHT;
 435         else if (newPosition.x + draggingDiv.offsetWidth <
 436                    baseDiv.offsetLeft)
 437           this.layout_ = this.dragging_.display.isPrimary ?
 438               options.SecondaryDisplayLayout.RIGHT :
 439               options.SecondaryDisplayLayout.LEFT;
 440       }
 441
 442       var layoutToBase;
 443       if (!this.dragging_.display.isPrimary) {
 444         layoutToBase = this.layout_;
 445       } else {
 446         switch (this.layout_) {
 447           case options.SecondaryDisplayLayout.RIGHT:
 448             layoutToBase = options.SecondaryDisplayLayout.LEFT;
 449             break;
 450           case options.SecondaryDisplayLayout.LEFT:
 451             layoutToBase = options.SecondaryDisplayLayout.RIGHT;
 452             break;
 453           case options.SecondaryDisplayLayout.TOP:
 454             layoutToBase = options.SecondaryDisplayLayout.BOTTOM;
 455             break;
 456           case options.SecondaryDisplayLayout.BOTTOM:
 457             layoutToBase = options.SecondaryDisplayLayout.TOP;
 458             break;
 459         }
 460       }
 461
 462       switch (layoutToBase) {
 463         case options.SecondaryDisplayLayout.RIGHT:
 464           draggingDiv.style.left =
 465               baseDiv.offsetLeft + baseDiv.offsetWidth + 'px';
 466           draggingDiv.style.top = newPosition.y + 'px';
 467           break;
 468         case options.SecondaryDisplayLayout.LEFT:
 469           draggingDiv.style.left =
 470               baseDiv.offsetLeft - draggingDiv.offsetWidth + 'px';
 471           draggingDiv.style.top = newPosition.y + 'px';
 472           break;
 473         case options.SecondaryDisplayLayout.TOP:
 474           draggingDiv.style.top =
 475               baseDiv.offsetTop - draggingDiv.offsetHeight + 'px';
 476           draggingDiv.style.left = newPosition.x + 'px';
 477           break;
 478         case options.SecondaryDisplayLayout.BOTTOM:
 479           draggingDiv.style.top =
 480               baseDiv.offsetTop + baseDiv.offsetHeight + 'px';
 481           draggingDiv.style.left = newPosition.x + 'px';
 482           break;
 483       }
 484
 485       return false;
 486     },
 487
 488     /**
 489      * start dragging of a display rectangle.
 490      * @param {HTMLElement} target The event target.
 491      * @param {Object} eventLocation The object to hold the location where
 492      *     this event happens.
 493      * @private
 494      */
 495     startDragging_: function(target, eventLocation) {
 496       this.focusedIndex_ = null;
 497       for (var i = 0; i < this.displays_.length; i++) {
 498         var display = this.displays_[i];
 499         if (display.div == target ||
 500             (target.offsetParent && target.offsetParent == display.div)) {
 501           this.focusedIndex_ = i;
 502           break;
 503         }
 504       }
 505
 506       for (var i = 0; i < this.displays_.length; i++) {
 507         var display = this.displays_[i];
 508         display.div.className = 'displays-display';
 509         if (i != this.focusedIndex_)
 510           continue;
 511
 512         display.div.classList.add('displays-focused');
 513         if (this.displays_.length > 1) {
 514           this.dragging_ = {
 515             display: display,
 516             originalLocation: {
 517               x: display.div.offsetLeft, y: display.div.offsetTop
 518             },
 519             eventLocation: eventLocation
 520           };
 521         }
 522       }
 523
 524       this.updateSelectedDisplayDescription_();
 525       return false;
 526     },
 527
 528     /**
 529      * finish the current dragging of displays.
 530      * @param {Event} e The event which triggers this.
 531      * @private
 532      */
 533     endDragging_: function(e) {
 534       this.lastTouchLocation_ = null;
 535       if (this.dragging_) {
 536         // Make sure the dragging location is connected.
 537         var baseDiv = this.dragging_.display.isPrimary ?
 538             this.secondaryDisplay_.div : this.primaryDisplay_.div;
 539         var draggingDiv = this.dragging_.display.div;
 540         if (this.layout_ == options.SecondaryDisplayLayout.LEFT ||
 541             this.layout_ == options.SecondaryDisplayLayout.RIGHT) {
 542           var top = Math.max(draggingDiv.offsetTop,
 543                              baseDiv.offsetTop - draggingDiv.offsetHeight +
 544                              MIN_OFFSET_OVERLAP);
 545           top = Math.min(top,
 546                          baseDiv.offsetTop + baseDiv.offsetHeight -
 547                          MIN_OFFSET_OVERLAP);
 548           draggingDiv.style.top = top + 'px';
 549         } else {
 550           var left = Math.max(draggingDiv.offsetLeft,
 551                               baseDiv.offsetLeft - draggingDiv.offsetWidth +
 552                               MIN_OFFSET_OVERLAP);
 553           left = Math.min(left,
 554                           baseDiv.offsetLeft + baseDiv.offsetWidth -
 555                           MIN_OFFSET_OVERLAP);
 556           draggingDiv.style.left = left + 'px';
 557         }
 558         var originalPosition = this.dragging_.display.originalPosition;
 559         if (originalPosition.x != draggingDiv.offsetLeft ||
 560             originalPosition.y != draggingDiv.offsetTop)
 561           this.applyResult_();
 562         this.dragging_ = null;
 563       }
 564       this.updateSelectedDisplayDescription_();
 565       return false;
 566     },
 567
 568     /**
 569      * Updates the description of selected display section for mirroring mode.
 570      * @private
 571      */
 572     updateSelectedDisplaySectionMirroring_: function() {
 573       $('display-configuration-arrow').hidden = true;
 574       $('display-options-set-primary').disabled = true;
 575       $('display-options-toggle-mirroring').disabled = false;
 576       $('selected-display-start-calibrating-overscan').disabled = true;
 577       $('display-options-orientation-selection').disabled = true;
 578       var display = this.displays_[0];
 579       $('selected-display-name').textContent =
 580           loadTimeData.getString('mirroringDisplay');
 581       var resolution = $('display-options-resolution-selection');
 582       var option = document.createElement('option');
 583       option.value = 'default';
 584       option.textContent = display.width + 'x' + display.height;
 585       resolution.appendChild(option);
 586       resolution.disabled = true;
 587     },
 588
 589     /**
 590      * Updates the description of selected display section when no display is
 591      * selected.
 592      * @private
 593      */
 594     updateSelectedDisplaySectionNoSelected_: function() {
 595       $('display-configuration-arrow').hidden = true;
 596       $('display-options-set-primary').disabled = true;
 597       $('display-options-toggle-mirroring').disabled = true;
 598       $('selected-display-start-calibrating-overscan').disabled = true;
 599       $('display-options-orientation-selection').disabled = true;
 600       $('selected-display-name').textContent = '';
 601       var resolution = $('display-options-resolution-selection');
 602       resolution.appendChild(document.createElement('option'));
 603       resolution.disabled = true;
 604     },
 605
 606     /**
 607      * Updates the description of selected display section for the selected
 608      * display.
 609      * @param {Object} display The selected display object.
 610      * @private
 611      */
 612     updateSelectedDisplaySectionForDisplay_: function(display) {
 613       var arrow = $('display-configuration-arrow');
 614       arrow.hidden = false;
 615       // Adding 1 px to the position to fit the border line and the border in
 616       // arrow precisely.
 617       arrow.style.top = $('display-configurations').offsetTop -
 618           arrow.offsetHeight / 2 + 'px';
 619       arrow.style.left = display.div.offsetLeft +
 620           display.div.offsetWidth / 2 - arrow.offsetWidth / 2 + 'px';
 621
 622       $('display-options-set-primary').disabled = display.isPrimary;
 623       $('display-options-toggle-mirroring').disabled =
 624           (this.displays_.length <= 1);
 625       $('selected-display-start-calibrating-overscan').disabled =
 626           display.isInternal;
 627
 628       var orientation = $('display-options-orientation-selection');
 629       orientation.disabled = false;
 630       var orientationOptions = orientation.getElementsByTagName('option');
 631       orientationOptions[display.orientation].selected = true;
 632
 633       $('selected-display-name').textContent = display.name;
 634
 635       var resolution = $('display-options-resolution-selection');
 636       if (display.resolutions.length <= 1) {
 637         var option = document.createElement('option');
 638         option.value = 'default';
 639         option.textContent = display.width + 'x' + display.height;
 640         option.selected = true;
 641         resolution.appendChild(option);
 642         resolution.disabled = true;
 643       } else {
 644         var previousOption;
 645         for (var i = 0; i < display.resolutions.length; i++) {
 646           var option = document.createElement('option');
 647           option.value = i;
 648           option.textContent = display.resolutions[i].width + 'x' +
 649               display.resolutions[i].height;
 650           if (display.resolutions[i].isBest) {
 651             option.textContent += ' ' +
 652                 loadTimeData.getString('annotateBest');
 653           } else if (display.resolutions[i].isNative) {
 654             option.textContent += ' ' +
 655                 loadTimeData.getString('annotateNative');
 656           }
 657           if (display.resolutions[i].deviceScaleFactor && previousOption &&
 658               previousOption.textContent == option.textContent) {
 659             option.textContent +=
 660                 ' (' + display.resolutions[i].deviceScaleFactor + 'x)';
 661           }
 662           option.selected = display.resolutions[i].selected;
 663           resolution.appendChild(option);
 664           previousOption = option;
 665         }
 666         resolution.disabled = (display.resolutions.length <= 1);
 667       }
 668
 669       if (display.availableColorProfiles.length <= 1) {
 670         $('selected-display-color-profile-row').hidden = true;
 671       } else {
 672         $('selected-display-color-profile-row').hidden = false;
 673         var profiles = $('display-options-color-profile-selection');
 674         profiles.innerHTML = '';
 675         for (var i = 0; i < display.availableColorProfiles.length; i++) {
 676           var option = document.createElement('option');
 677           var colorProfile = display.availableColorProfiles[i];
 678           option.value = colorProfile.profileId;
 679           option.textContent = colorProfile.name;
 680           option.selected = (
 681               display.colorProfile == colorProfile.profileId);
 682           profiles.appendChild(option);
 683         }
 684       }
 685     },
 686
 687     /**
 688      * Updates the description of the selected display section.
 689      * @private
 690      */
 691     updateSelectedDisplayDescription_: function() {
 692       var resolution = $('display-options-resolution-selection');
 693       resolution.textContent = '';
 694       var orientation = $('display-options-orientation-selection');
 695       var orientationOptions = orientation.getElementsByTagName('option');
 696       for (var i = 0; i < orientationOptions.length; i++)
 697         orientationOptions.selected = false;
 698
 699       if (this.mirroring_) {
 700         this.updateSelectedDisplaySectionMirroring_();
 701       } else if (this.focusedIndex_ == null ||
 702           this.displays_[this.focusedIndex_] == null) {
 703         this.updateSelectedDisplaySectionNoSelected_();
 704       } else {
 705         this.updateSelectedDisplaySectionForDisplay_(
 706             this.displays_[this.focusedIndex_]);
 707       }
 708     },
 709
 710     /**
 711      * Clears the drawing area for display rectangles.
 712      * @private
 713      */
 714     resetDisplaysView_: function() {
 715       var displaysViewHost = $('display-options-displays-view-host');
 716       displaysViewHost.removeChild(displaysViewHost.firstChild);
 717       this.displaysView_ = document.createElement('div');
 718       this.displaysView_.id = 'display-options-displays-view';
 719       displaysViewHost.appendChild(this.displaysView_);
 720     },
 721
 722     /**
 723      * Lays out the display rectangles for mirroring.
 724      * @private
 725      */
 726     layoutMirroringDisplays_: function() {
 727       // Offset pixels for secondary display rectangles. The offset includes the
 728       // border width.
 729       /** @const */ var MIRRORING_OFFSET_PIXELS = 3;
 730       // Always show two displays because there must be two displays when
 731       // the display_options is enabled.  Don't rely on displays_.length because
 732       // there is only one display from chrome's perspective in mirror mode.
 733       /** @const */ var MIN_NUM_DISPLAYS = 2;
 734       /** @const */ var MIRRORING_VERTICAL_MARGIN = 20;
 735
 736       // The width/height should be same as the first display:
 737       var width = Math.ceil(this.displays_[0].width * this.visualScale_);
 738       var height = Math.ceil(this.displays_[0].height * this.visualScale_);
 739
 740       var numDisplays = Math.max(MIN_NUM_DISPLAYS, this.displays_.length);
 741
 742       var totalWidth = width + numDisplays * MIRRORING_OFFSET_PIXELS;
 743       var totalHeight = height + numDisplays * MIRRORING_OFFSET_PIXELS;
 744
 745       this.displaysView_.style.height = totalHeight + 'px';
 746       this.displaysView_.classList.add(
 747           'display-options-displays-view-mirroring');
 748
 749       // The displays should be centered.
 750       var offsetX =
 751           $('display-options-displays-view').offsetWidth / 2 - totalWidth / 2;
 752
 753       for (var i = 0; i < numDisplays; i++) {
 754         var div = document.createElement('div');
 755         div.className = 'displays-display';
 756         div.style.top = i * MIRRORING_OFFSET_PIXELS + 'px';
 757         div.style.left = i * MIRRORING_OFFSET_PIXELS + offsetX + 'px';
 758         div.style.width = width + 'px';
 759         div.style.height = height + 'px';
 760         div.style.zIndex = i;
 761         // set 'display-mirrored' class for the background display rectangles.
 762         if (i != numDisplays - 1)
 763           div.classList.add('display-mirrored');
 764         this.displaysView_.appendChild(div);
 765       }
 766     },
 767
 768     /**
 769      * Creates a div element representing the specified display.
 770      * @param {Object} display The display object.
 771      * @param {boolean} focused True if it's focused.
 772      * @private
 773      */
 774     createDisplayRectangle_: function(display, focused) {
 775       var div = document.createElement('div');
 776       display.div = div;
 777       div.className = 'displays-display';
 778       if (focused)
 779         div.classList.add('displays-focused');
 780
 781       // div needs to be added to the DOM tree first, otherwise offsetHeight for
 782       // nameContainer below cannot be computed.
 783       this.displaysView_.appendChild(div);
 784
 785       var nameContainer = document.createElement('div');
 786       nameContainer.textContent = display.name;
 787       div.appendChild(nameContainer);
 788       div.style.width = Math.floor(display.width * this.visualScale_) + 'px';
 789       var newHeight = Math.floor(display.height * this.visualScale_);
 790       div.style.height = newHeight + 'px';
 791       nameContainer.style.marginTop =
 792           (newHeight - nameContainer.offsetHeight) / 2 + 'px';
 793
 794       div.onmousedown = this.onMouseDown_.bind(this);
 795       div.ontouchstart = this.onTouchStart_.bind(this);
 796       return div;
 797     },
 798
 799     /**
 800      * Layouts the display rectangles according to the current layout_.
 801      * @private
 802      */
 803     layoutDisplays_: function() {
 804       var maxWidth = 0;
 805       var maxHeight = 0;
 806       var boundingBox = {left: 0, right: 0, top: 0, bottom: 0};
 807       this.primaryDisplay_ = null;
 808       this.secondaryDisplay_ = null;
 809       var focusedDisplay = null;
 810       for (var i = 0; i < this.displays_.length; i++) {
 811         var display = this.displays_[i];
 812         if (display.isPrimary)
 813           this.primaryDisplay_ = display;
 814         else
 815           this.secondaryDisplay_ = display;
 816         if (i == this.focusedIndex_)
 817           focusedDisplay = display;
 818
 819         boundingBox.left = Math.min(boundingBox.left, display.x);
 820         boundingBox.right = Math.max(
 821             boundingBox.right, display.x + display.width);
 822         boundingBox.top = Math.min(boundingBox.top, display.y);
 823         boundingBox.bottom = Math.max(
 824             boundingBox.bottom, display.y + display.height);
 825         maxWidth = Math.max(maxWidth, display.width);
 826         maxHeight = Math.max(maxHeight, display.height);
 827       }
 828       if (!this.primaryDisplay_)
 829         return;
 830
 831       // Make the margin around the bounding box.
 832       var areaWidth = boundingBox.right - boundingBox.left + maxWidth;
 833       var areaHeight = boundingBox.bottom - boundingBox.top + maxHeight;
 834
 835       // Calculates the scale by the width since horizontal size is more strict.
 836       // TODO(mukai): Adds the check of vertical size in case.
 837       this.visualScale_ = Math.min(
 838           VISUAL_SCALE, this.displaysView_.offsetWidth / areaWidth);
 839
 840       // Prepare enough area for thisplays_view by adding the maximum height.
 841       this.displaysView_.style.height =
 842           Math.ceil(areaHeight * this.visualScale_) + 'px';
 843
 844       // Centering the bounding box of the display rectangles.
 845       var offset = {
 846         x: Math.floor(this.displaysView_.offsetWidth / 2 -
 847             (boundingBox.right + boundingBox.left) * this.visualScale_ / 2),
 848         y: Math.floor(this.displaysView_.offsetHeight / 2 -
 849             (boundingBox.bottom + boundingBox.top) * this.visualScale_ / 2)
 850       };
 851
 852       // Layouting the display rectangles. First layout the primaryDisplay and
 853       // then layout the secondary which is attaching to the primary.
 854       var primaryDiv = this.createDisplayRectangle_(
 855           this.primaryDisplay_, this.primaryDisplay_ == focusedDisplay);
 856       primaryDiv.style.left =
 857           Math.floor(this.primaryDisplay_.x * this.visualScale_) +
 858               offset.x + 'px';
 859       primaryDiv.style.top =
 860           Math.floor(this.primaryDisplay_.y * this.visualScale_) +
 861               offset.y + 'px';
 862       this.primaryDisplay_.originalPosition = {
 863         x: primaryDiv.offsetLeft, y: primaryDiv.offsetTop};
 864
 865       if (this.secondaryDisplay_) {
 866         var secondaryDiv = this.createDisplayRectangle_(
 867             this.secondaryDisplay_, this.secondaryDisplay_ == focusedDisplay);
 868         // Don't trust the secondary display's x or y, because it may cause a
 869         // 1px gap due to rounding, which will create a fake update on end
 870         // dragging. See crbug.com/386401
 871         switch (this.layout_) {
 872         case options.SecondaryDisplayLayout.TOP:
 873           secondaryDiv.style.left =
 874               Math.floor(this.secondaryDisplay_.x * this.visualScale_) +
 875               offset.x + 'px';
 876           secondaryDiv.style.top =
 877               primaryDiv.offsetTop - secondaryDiv.offsetHeight + 'px';
 878           break;
 879         case options.SecondaryDisplayLayout.RIGHT:
 880           secondaryDiv.style.left =
 881               primaryDiv.offsetLeft + primaryDiv.offsetWidth + 'px';
 882           secondaryDiv.style.top =
 883               Math.floor(this.secondaryDisplay_.y * this.visualScale_) +
 884               offset.y + 'px';
 885           break;
 886         case options.SecondaryDisplayLayout.BOTTOM:
 887           secondaryDiv.style.left =
 888               Math.floor(this.secondaryDisplay_.x * this.visualScale_) +
 889               offset.x + 'px';
 890           secondaryDiv.style.top =
 891               primaryDiv.offsetTop + primaryDiv.offsetHeight + 'px';
 892           break;
 893         case options.SecondaryDisplayLayout.LEFT:
 894           secondaryDiv.style.left =
 895               primaryDiv.offsetLeft - secondaryDiv.offsetWidth + 'px';
 896           secondaryDiv.style.top =
 897               Math.floor(this.secondaryDisplay_.y * this.visualScale_) +
 898               offset.y + 'px';
 899           break;
 900         }
 901         this.secondaryDisplay_.originalPosition = {
 902           x: secondaryDiv.offsetLeft, y: secondaryDiv.offsetTop};
 903       }
 904     },
 905
 906     /**
 907      * Called when the display arrangement has changed.
 908      * @param {boolean} mirroring Whether current mode is mirroring or not.
 909      * @param {Array.<options.DisplayInfo>} displays The list of the display
 910      *     information.
 911      * @param {options.SecondaryDisplayLayout} layout The layout strategy.
 912      * @param {number} offset The offset of the secondary display.
 913      * @private
 914      */
 915     onDisplayChanged_: function(mirroring, displays, layout, offset) {
 916       if (!this.visible)
 917         return;
 918
 919       var hasExternal = false;
 920       for (var i = 0; i < displays.length; i++) {
 921         if (!displays[i].isInternal) {
 922           hasExternal = true;
 923           break;
 924         }
 925       }
 926
 927       this.layout_ = layout;
 928
 929       $('display-options-toggle-mirroring').textContent =
 930           loadTimeData.getString(
 931               mirroring ? 'stopMirroring' : 'startMirroring');
 932
 933       // Focus to the first display next to the primary one when |displays| list
 934       // is updated.
 935       if (mirroring) {
 936         this.focusedIndex_ = null;
 937       } else if (this.mirroring_ != mirroring ||
 938                  this.displays_.length != displays.length) {
 939         this.focusedIndex_ = 0;
 940       }
 941
 942       this.mirroring_ = mirroring;
 943       this.displays_ = displays;
 944
 945       this.resetDisplaysView_();
 946       if (this.mirroring_)
 947         this.layoutMirroringDisplays_();
 948       else
 949         this.layoutDisplays_();
 950
 951       this.updateSelectedDisplayDescription_();
 952     }
 953   };
 954
 955   DisplayOptions.setDisplayInfo = function(
 956       mirroring, displays, layout, offset) {
 957     DisplayOptions.getInstance().onDisplayChanged_(
 958         mirroring, displays, layout, offset);
 959   };
 960
 961   // Export
 962   return {
 963     DisplayOptions: DisplayOptions
 964   };
 965 });