<!DOCTYPE html>
<!--
Copyright (c) 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.
-->

<link rel="import" href="/tracing/base/base64.html">
<link rel="import" href="/tracing/extras/chrome/cc/picture.html">
<link rel="import" href="/tracing/ui/analysis/generic_object_view.html">
<link rel="import" href="/tracing/ui/base/drag_handle.html">
<link rel="import" href="/tracing/ui/base/hotkey_controller.html">
<link rel="import" href="/tracing/ui/base/info_bar.html">
<link rel="import" href="/tracing/ui/base/list_view.html">
<link rel="import" href="/tracing/ui/base/mouse_mode_selector.html">
<link rel="import" href="/tracing/ui/base/overlay.html">
<link rel="import" href="/tracing/ui/base/utils.html">
<link rel="import" href="/tracing/ui/extras/chrome/cc/display_item_list_item.html">
<link rel="import" href="/tracing/ui/extras/chrome/cc/picture_ops_list_view.html">

<template id="tr-ui-e-chrome-cc-display-item-debugger-template">
  <style>
  * /deep/ tr-ui-e-chrome-cc-display-item-debugger {
    -webkit-flex: 1 1 auto;
    display: -webkit-flex;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > left-panel {
    -webkit-flex-direction: column;
    display: -webkit-flex;
    min-width: 300px;
    overflow-y: auto;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > left-panel >
        display-item-info {
    -webkit-flex: 1 1 auto;
    padding-top: 2px;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > left-panel >
        display-item-info .title {
    font-weight: bold;
    margin-left: 5px;
    margin-right: 5px;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > left-panel >
        display-item-info .export {
    margin: 5px;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > tr-ui-b-drag-handle {
    -webkit-flex: 0 0 auto;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > right-panel {
    -webkit-flex: 1 1 auto;
    display: -webkit-flex;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > left-panel >
      display-item-info > header {
    border-bottom: 1px solid #555;
  }

  /*************************************************/

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > right-panel >
      tr-ui-e-chrome-cc-picture-ops-list-view.hasPictureOps {
    display: block;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > right-panel >
        tr-ui-b-drag-handle.hasPictureOps {
    display: block;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > right-panel >
        tr-ui-e-chrome-cc-picture-ops-list-view {
    display: none;
    overflow-y: auto;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger > right-panel >
        tr-ui-b-drag-handle {
    display: none;
  }

  * /deep/ tr-ui-e-chrome-cc-display-item-debugger raster-area {
    -webkit-flex: 1 1 auto;
    background-color: #ddd;
    min-height: 200px;
    min-width: 200px;
    overflow-y: auto;
    padding-left: 5px;
  }
  </style>

  <left-panel>
    <display-item-info>
      <header>
        <span class='title'>Display Item List</span>
        <span class='size'></span>
        <div class='export'>
          <input class='dlfilename' type='text' value='displayitemlist.json' />
          <button class='dlexport'>Export display item list</button>
        </div>
        <div class='export'>
          <input class='skpfilename' type='text' value='skpicture.skp' />
          <button class='skpexport'>Export list as SkPicture</button>
        </div>
      </header>
    </display-item-info>
  </left-panel>
  <right-panel>
    <raster-area><canvas></canvas></raster-area>
  </right-panel>
</template>

<script>
'use strict';

tr.exportTo('tr.ui.e.chrome.cc', function() {
  var THIS_DOC = document.currentScript.ownerDocument;

  /**
   * DisplayItemDebugger is a view of a DisplayItemListSnapshot for inspecting
   * a display item list and the pictures within it.
   *
   * @constructor
   */
  var DisplayItemDebugger = tr.ui.b.define(
      'tr-ui-e-chrome-cc-display-item-debugger');

  DisplayItemDebugger.prototype = {
    __proto__: HTMLUnknownElement.prototype,

    decorate: function() {
      var node = tr.ui.b.instantiateTemplate(
          '#tr-ui-e-chrome-cc-display-item-debugger-template', THIS_DOC);

      this.appendChild(node);

      this.pictureAsImageData_ = undefined;
      this.zoomScaleValue_ = 1;

      this.sizeInfo_ = this.querySelector('.size');
      this.rasterArea_ = this.querySelector('raster-area');
      this.rasterCanvas_ = this.rasterArea_.querySelector('canvas');
      this.rasterCtx_ = this.rasterCanvas_.getContext('2d');

      this.trackMouse_();

      this.displayItemInfo_ = this.querySelector('display-item-info');
      this.displayItemInfo_.addEventListener(
          'click', this.onDisplayItemInfoClick_.bind(this), false);

      this.displayItemListView_ = new tr.ui.b.ListView();
      this.displayItemListView_.addEventListener('selection-changed',
          this.onDisplayItemListSelection_.bind(this));
      this.displayItemInfo_.appendChild(this.displayItemListView_);

      this.displayListFilename_ = this.querySelector('.dlfilename');
      this.displayListExportButton_ = this.querySelector('.dlexport');
      this.displayListExportButton_.addEventListener(
          'click', this.onExportDisplayListClicked_.bind(this));

      this.skpFilename_ = this.querySelector('.skpfilename');
      this.skpExportButton_ = this.querySelector('.skpexport');
      this.skpExportButton_.addEventListener(
          'click', this.onExportSkPictureClicked_.bind(this));

      var leftPanel = this.querySelector('left-panel');

      var middleDragHandle = document.createElement('tr-ui-b-drag-handle');
      middleDragHandle.horizontal = false;
      middleDragHandle.target = leftPanel;

      var rightPanel = this.querySelector('right-panel');

      this.infoBar_ = document.createElement('tr-ui-b-info-bar');
      this.rasterArea_.insertBefore(this.infoBar_, this.rasterCanvas_);

      this.insertBefore(middleDragHandle, rightPanel);

      this.picture_ = undefined;

      this.pictureOpsListView_ = new tr.ui.e.chrome.cc.PictureOpsListView();
      rightPanel.insertBefore(this.pictureOpsListView_, this.rasterArea_);

      this.pictureOpsListDragHandle_ =
          document.createElement('tr-ui-b-drag-handle');
      this.pictureOpsListDragHandle_.horizontal = false;
      this.pictureOpsListDragHandle_.target = this.pictureOpsListView_;
      rightPanel.insertBefore(this.pictureOpsListDragHandle_, this.rasterArea_);
    },

    get picture() {
      return this.picture_;
    },

    set displayItemList(displayItemList) {
      this.displayItemList_ = displayItemList;
      this.picture = this.displayItemList_;

      this.displayItemListView_.clear();
      this.displayItemList_.items.forEach(function(item) {
        var listItem = document.createElement(
            'tr-ui-e-chrome-cc-display-item-list-item');
        listItem.data = item;
        this.displayItemListView_.appendChild(listItem);
      }.bind(this));
    },

    set picture(picture) {
      this.picture_ = picture;

      // Hide the ops list if we are showing the "main" display item list.
      var showOpsList = picture && picture !== this.displayItemList_;
      this.updateDrawOpsList_(showOpsList);

      if (picture) {
        var size = this.getRasterCanvasSize_();
        this.rasterCanvas_.width = size.width;
        this.rasterCanvas_.height = size.height;
      }

      var bounds = this.rasterArea_.getBoundingClientRect();
      var selectorBounds = this.mouseModeSelector_.getBoundingClientRect();
      this.mouseModeSelector_.pos = {
        x: (bounds.right - selectorBounds.width - 10),
        y: bounds.top
      };

      this.rasterize_();

      this.scheduleUpdateContents_();
    },

    getRasterCanvasSize_: function() {
      var style = window.getComputedStyle(this.rasterArea_);
      var width = parseInt(style.width);
      var height = parseInt(style.height);
      if (this.picture_) {
        width = Math.max(width, this.picture_.layerRect.width);
        height = Math.max(height, this.picture_.layerRect.height);
      }

      return {
        width: width,
        height: height
      };
    },

    scheduleUpdateContents_: function() {
      if (this.updateContentsPending_)
        return;
      this.updateContentsPending_ = true;
      tr.b.requestAnimationFrameInThisFrameIfPossible(
          this.updateContents_.bind(this)
      );
    },

    updateContents_: function() {
      this.updateContentsPending_ = false;

      if (this.picture_) {
        this.sizeInfo_.textContent = '(' +
            this.picture_.layerRect.width + ' x ' +
            this.picture_.layerRect.height + ')';
      }

      // Return if picture hasn't finished rasterizing.
      if (!this.pictureAsImageData_)
        return;

      this.infoBar_.visible = false;
      this.infoBar_.removeAllButtons();
      if (this.pictureAsImageData_.error) {
        this.infoBar_.message = 'Cannot rasterize...';
        this.infoBar_.addButton('More info...', function(e) {
          var overlay = new tr.ui.b.Overlay();
          overlay.textContent = this.pictureAsImageData_.error;
          overlay.visible = true;
          e.stopPropagation();
          return false;
        }.bind(this));
        this.infoBar_.visible = true;
      }

      this.drawPicture_();
    },

    drawPicture_: function() {
      var size = this.getRasterCanvasSize_();
      if (size.width !== this.rasterCanvas_.width)
        this.rasterCanvas_.width = size.width;
      if (size.height !== this.rasterCanvas_.height)
        this.rasterCanvas_.height = size.height;

      this.rasterCtx_.clearRect(0, 0, size.width, size.height);

      if (!this.picture_ || !this.pictureAsImageData_.imageData)
        return;

      var imgCanvas = this.pictureAsImageData_.asCanvas();
      var w = imgCanvas.width;
      var h = imgCanvas.height;
      this.rasterCtx_.drawImage(imgCanvas, 0, 0, w, h,
                                0, 0, w * this.zoomScaleValue_,
                                h * this.zoomScaleValue_);
    },

    rasterize_: function() {
      if (this.picture_) {
        this.picture_.rasterize(
            {
              showOverdraw: false
            },
            this.onRasterComplete_.bind(this));
      }
    },

    onRasterComplete_: function(pictureAsImageData) {
      this.pictureAsImageData_ = pictureAsImageData;
      this.scheduleUpdateContents_();
    },

    onDisplayItemListSelection_: function(e) {
      var selected = this.displayItemListView_.selectedElement;

      if (!selected) {
        this.picture = this.displayItemList_;
        return;
      }

      var index = Array.prototype.indexOf.call(
          this.displayItemListView_.children, selected);
      var displayItem = this.displayItemList_.items[index];
      if (displayItem && displayItem.skp64)
        this.picture = new tr.e.cc.Picture(
            displayItem.skp64, this.displayItemList_.layerRect);
      else
        this.picture = undefined;
    },

    onDisplayItemInfoClick_: function(e) {
      if (e && e.target == this.displayItemInfo_) {
        this.displayItemListView_.selectedElement = undefined;
      }
    },

    updateDrawOpsList_: function(showOpsList) {
      if (showOpsList) {
        this.pictureOpsListView_.picture = this.picture_;
        if (this.pictureOpsListView_.numOps > 0) {
          this.pictureOpsListView_.classList.add('hasPictureOps');
          this.pictureOpsListDragHandle_.classList.add('hasPictureOps');
        }
      } else {
        this.pictureOpsListView_.classList.remove('hasPictureOps');
        this.pictureOpsListDragHandle_.classList.remove('hasPictureOps');
      }
    },

    trackMouse_: function() {
      this.mouseModeSelector_ = document.createElement(
          'tr-ui-b-mouse-mode-selector');
      this.mouseModeSelector_.targetElement = this.rasterArea_;
      this.rasterArea_.appendChild(this.mouseModeSelector_);

      this.mouseModeSelector_.supportedModeMask =
          tr.ui.b.MOUSE_SELECTOR_MODE.ZOOM;
      this.mouseModeSelector_.mode = tr.ui.b.MOUSE_SELECTOR_MODE.ZOOM;
      this.mouseModeSelector_.defaultMode = tr.ui.b.MOUSE_SELECTOR_MODE.ZOOM;
      this.mouseModeSelector_.settingsKey = 'pictureDebugger.mouseModeSelector';

      this.mouseModeSelector_.addEventListener('beginzoom',
          this.onBeginZoom_.bind(this));
      this.mouseModeSelector_.addEventListener('updatezoom',
          this.onUpdateZoom_.bind(this));
      this.mouseModeSelector_.addEventListener('endzoom',
          this.onEndZoom_.bind(this));
    },

    onBeginZoom_: function(e) {
      this.isZooming_ = true;

      this.lastMouseViewPos_ = this.extractRelativeMousePosition_(e);

      e.preventDefault();
    },

    onUpdateZoom_: function(e) {
      if (!this.isZooming_)
        return;

      var currentMouseViewPos = this.extractRelativeMousePosition_(e);

      // Take the distance the mouse has moved and we want to zoom at about
      // 1/1000th of that speed. 0.01 feels jumpy. This could possibly be tuned
      // more if people feel it's too slow.
      this.zoomScaleValue_ +=
          ((this.lastMouseViewPos_.y - currentMouseViewPos.y) * 0.001);
      this.zoomScaleValue_ = Math.max(this.zoomScaleValue_, 0.1);

      this.drawPicture_();

      this.lastMouseViewPos_ = currentMouseViewPos;
    },

    onEndZoom_: function(e) {
      this.lastMouseViewPos_ = undefined;
      this.isZooming_ = false;
      e.preventDefault();
    },

    extractRelativeMousePosition_: function(e) {
      return {
        x: e.clientX - this.rasterArea_.offsetLeft,
        y: e.clientY - this.rasterArea_.offsetTop
      };
    },

    saveFile_: function(filename, rawData) {
      if (!rawData)
        return;

      // Convert this String into an Uint8Array
      var length = rawData.length;
      var arrayBuffer = new ArrayBuffer(length);
      var uint8Array = new Uint8Array(arrayBuffer);
      for (var c = 0; c < length; c++)
        uint8Array[c] = rawData.charCodeAt(c);

      // Create a blob URL from the binary array.
      var blob = new Blob([uint8Array], {type: 'application/octet-binary'});
      var blobUrl = window.URL.createObjectURL(blob);

      // Create a link and click on it.
      var link = document.createElementNS('http://www.w3.org/1999/xhtml', 'a');
      link.href = blobUrl;
      link.download = filename;
      var event = document.createEvent('MouseEvents');
      event.initMouseEvent(
          'click', true, false, window, 0, 0, 0, 0, 0,
          false, false, false, false, 0, null);
      link.dispatchEvent(event);
    },

    onExportDisplayListClicked_: function() {
      var rawData = JSON.stringify(this.displayItemList_.items);
      this.saveFile_(this.displayListFilename_.value, rawData);
    },

    onExportSkPictureClicked_: function() {
      var rawData = tr.b.Base64.atob(this.picture_.getBase64SkpData());
      this.saveFile_(this.skpFilename_.value, rawData);
    }
  };

  return {
    DisplayItemDebugger: DisplayItemDebugger
  };
});
</script>