pdfjs-dist/lib/web/debugger.js

/* Copyright 2017 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
'use strict';
var FontInspector = function FontInspectorClosure() {
 var fonts;
 var active = false;
 var fontAttribute = 'data-font-name';
 function removeSelection() {
  var divs = document.querySelectorAll('div[' + fontAttribute + ']');
  for (var i = 0, ii = divs.length; i < ii; ++i) {
   var div = divs[i];
   div.className = '';
  }
 }
 function resetSelection() {
  var divs = document.querySelectorAll('div[' + fontAttribute + ']');
  for (var i = 0, ii = divs.length; i < ii; ++i) {
   var div = divs[i];
   div.className = 'debuggerHideText';
  }
 }
 function selectFont(fontName, show) {
  var divs = document.querySelectorAll('div[' + fontAttribute + '=' + fontName + ']');
  for (var i = 0, ii = divs.length; i < ii; ++i) {
   var div = divs[i];
   div.className = show ? 'debuggerShowText' : 'debuggerHideText';
  }
 }
 function textLayerClick(e) {
  if (!e.target.dataset.fontName || e.target.tagName.toUpperCase() !== 'DIV') {
   return;
  }
  var fontName = e.target.dataset.fontName;
  var selects = document.getElementsByTagName('input');
  for (var i = 0; i < selects.length; ++i) {
   var select = selects[i];
   if (select.dataset.fontName !== fontName) {
    continue;
   }
   select.checked = !select.checked;
   selectFont(fontName, select.checked);
   select.scrollIntoView();
  }
 }
 return {
  id: 'FontInspector',
  name: 'Font Inspector',
  panel: null,
  manager: null,
  init: function init(pdfjsLib) {
   var panel = this.panel;
   panel.setAttribute('style', 'padding: 5px;');
   var tmp = document.createElement('button');
   tmp.addEventListener('click', resetSelection);
   tmp.textContent = 'Refresh';
   panel.appendChild(tmp);
   fonts = document.createElement('div');
   panel.appendChild(fonts);
  },
  cleanup: function cleanup() {
   fonts.textContent = '';
  },
  enabled: false,
  get active() {
   return active;
  },
  set active(value) {
   active = value;
   if (active) {
    document.body.addEventListener('click', textLayerClick, true);
    resetSelection();
   } else {
    document.body.removeEventListener('click', textLayerClick, true);
    removeSelection();
   }
  },
  fontAdded: function fontAdded(fontObj, url) {
   function properties(obj, list) {
    var moreInfo = document.createElement('table');
    for (var i = 0; i < list.length; i++) {
     var tr = document.createElement('tr');
     var td1 = document.createElement('td');
     td1.textContent = list[i];
     tr.appendChild(td1);
     var td2 = document.createElement('td');
     td2.textContent = obj[list[i]].toString();
     tr.appendChild(td2);
     moreInfo.appendChild(tr);
    }
    return moreInfo;
   }
   var moreInfo = properties(fontObj, [
    'name',
    'type'
   ]);
   var fontName = fontObj.loadedName;
   var font = document.createElement('div');
   var name = document.createElement('span');
   name.textContent = fontName;
   var download = document.createElement('a');
   if (url) {
    url = /url\(['"]?([^\)"']+)/.exec(url);
    download.href = url[1];
   } else if (fontObj.data) {
    url = URL.createObjectURL(new Blob([fontObj.data], { type: fontObj.mimeType }));
    download.href = url;
   }
   download.textContent = 'Download';
   var logIt = document.createElement('a');
   logIt.href = '';
   logIt.textContent = 'Log';
   logIt.addEventListener('click', function (event) {
    event.preventDefault();
    console.log(fontObj);
   });
   var select = document.createElement('input');
   select.setAttribute('type', 'checkbox');
   select.dataset.fontName = fontName;
   select.addEventListener('click', function (select, fontName) {
    return function () {
     selectFont(fontName, select.checked);
    };
   }(select, fontName));
   font.appendChild(select);
   font.appendChild(name);
   font.appendChild(document.createTextNode(' '));
   font.appendChild(download);
   font.appendChild(document.createTextNode(' '));
   font.appendChild(logIt);
   font.appendChild(moreInfo);
   fonts.appendChild(font);
   setTimeout(function () {
    if (this.active) {
     resetSelection();
    }
   }.bind(this), 2000);
  }
 };
}();
var opMap;
var StepperManager = function StepperManagerClosure() {
 var steppers = [];
 var stepperDiv = null;
 var stepperControls = null;
 var stepperChooser = null;
 var breakPoints = Object.create(null);
 return {
  id: 'Stepper',
  name: 'Stepper',
  panel: null,
  manager: null,
  init: function init(pdfjsLib) {
   var self = this;
   this.panel.setAttribute('style', 'padding: 5px;');
   stepperControls = document.createElement('div');
   stepperChooser = document.createElement('select');
   stepperChooser.addEventListener('change', function (event) {
    self.selectStepper(this.value);
   });
   stepperControls.appendChild(stepperChooser);
   stepperDiv = document.createElement('div');
   this.panel.appendChild(stepperControls);
   this.panel.appendChild(stepperDiv);
   if (sessionStorage.getItem('pdfjsBreakPoints')) {
    breakPoints = JSON.parse(sessionStorage.getItem('pdfjsBreakPoints'));
   }
   opMap = Object.create(null);
   for (var key in pdfjsLib.OPS) {
    opMap[pdfjsLib.OPS[key]] = key;
   }
  },
  cleanup: function cleanup() {
   stepperChooser.textContent = '';
   stepperDiv.textContent = '';
   steppers = [];
  },
  enabled: false,
  active: false,
  create: function create(pageIndex) {
   var debug = document.createElement('div');
   debug.id = 'stepper' + pageIndex;
   debug.setAttribute('hidden', true);
   debug.className = 'stepper';
   stepperDiv.appendChild(debug);
   var b = document.createElement('option');
   b.textContent = 'Page ' + (pageIndex + 1);
   b.value = pageIndex;
   stepperChooser.appendChild(b);
   var initBreakPoints = breakPoints[pageIndex] || [];
   var stepper = new Stepper(debug, pageIndex, initBreakPoints);
   steppers.push(stepper);
   if (steppers.length === 1) {
    this.selectStepper(pageIndex, false);
   }
   return stepper;
  },
  selectStepper: function selectStepper(pageIndex, selectPanel) {
   var i;
   pageIndex = pageIndex | 0;
   if (selectPanel) {
    this.manager.selectPanel(this);
   }
   for (i = 0; i < steppers.length; ++i) {
    var stepper = steppers[i];
    if (stepper.pageIndex === pageIndex) {
     stepper.panel.removeAttribute('hidden');
    } else {
     stepper.panel.setAttribute('hidden', true);
    }
   }
   var options = stepperChooser.options;
   for (i = 0; i < options.length; ++i) {
    var option = options[i];
    option.selected = (option.value | 0) === pageIndex;
   }
  },
  saveBreakPoints: function saveBreakPoints(pageIndex, bps) {
   breakPoints[pageIndex] = bps;
   sessionStorage.setItem('pdfjsBreakPoints', JSON.stringify(breakPoints));
  }
 };
}();
var Stepper = function StepperClosure() {
 function c(tag, textContent) {
  var d = document.createElement(tag);
  if (textContent) {
   d.textContent = textContent;
  }
  return d;
 }
 function simplifyArgs(args) {
  if (typeof args === 'string') {
   var MAX_STRING_LENGTH = 75;
   return args.length <= MAX_STRING_LENGTH ? args : args.substr(0, MAX_STRING_LENGTH) + '...';
  }
  if (typeof args !== 'object' || args === null) {
   return args;
  }
  if ('length' in args) {
   var simpleArgs = [], i, ii;
   var MAX_ITEMS = 10;
   for (i = 0, ii = Math.min(MAX_ITEMS, args.length); i < ii; i++) {
    simpleArgs.push(simplifyArgs(args[i]));
   }
   if (i < args.length) {
    simpleArgs.push('...');
   }
   return simpleArgs;
  }
  var simpleObj = {};
  for (var key in args) {
   simpleObj[key] = simplifyArgs(args[key]);
  }
  return simpleObj;
 }
 function Stepper(panel, pageIndex, initialBreakPoints) {
  this.panel = panel;
  this.breakPoint = 0;
  this.nextBreakPoint = null;
  this.pageIndex = pageIndex;
  this.breakPoints = initialBreakPoints;
  this.currentIdx = -1;
  this.operatorListIdx = 0;
 }
 Stepper.prototype = {
  init: function init(operatorList) {
   var panel = this.panel;
   var content = c('div', 'c=continue, s=step');
   var table = c('table');
   content.appendChild(table);
   table.cellSpacing = 0;
   var headerRow = c('tr');
   table.appendChild(headerRow);
   headerRow.appendChild(c('th', 'Break'));
   headerRow.appendChild(c('th', 'Idx'));
   headerRow.appendChild(c('th', 'fn'));
   headerRow.appendChild(c('th', 'args'));
   panel.appendChild(content);
   this.table = table;
   this.updateOperatorList(operatorList);
  },
  updateOperatorList: function updateOperatorList(operatorList) {
   var self = this;
   function cboxOnClick() {
    var x = +this.dataset.idx;
    if (this.checked) {
     self.breakPoints.push(x);
    } else {
     self.breakPoints.splice(self.breakPoints.indexOf(x), 1);
    }
    StepperManager.saveBreakPoints(self.pageIndex, self.breakPoints);
   }
   var MAX_OPERATORS_COUNT = 15000;
   if (this.operatorListIdx > MAX_OPERATORS_COUNT) {
    return;
   }
   var chunk = document.createDocumentFragment();
   var operatorsToDisplay = Math.min(MAX_OPERATORS_COUNT, operatorList.fnArray.length);
   for (var i = this.operatorListIdx; i < operatorsToDisplay; i++) {
    var line = c('tr');
    line.className = 'line';
    line.dataset.idx = i;
    chunk.appendChild(line);
    var checked = this.breakPoints.indexOf(i) !== -1;
    var args = operatorList.argsArray[i] || [];
    var breakCell = c('td');
    var cbox = c('input');
    cbox.type = 'checkbox';
    cbox.className = 'points';
    cbox.checked = checked;
    cbox.dataset.idx = i;
    cbox.onclick = cboxOnClick;
    breakCell.appendChild(cbox);
    line.appendChild(breakCell);
    line.appendChild(c('td', i.toString()));
    var fn = opMap[operatorList.fnArray[i]];
    var decArgs = args;
    if (fn === 'showText') {
     var glyphs = args[0];
     var newArgs = [];
     var str = [];
     for (var j = 0; j < glyphs.length; j++) {
      var glyph = glyphs[j];
      if (typeof glyph === 'object' && glyph !== null) {
       str.push(glyph.fontChar);
      } else {
       if (str.length > 0) {
        newArgs.push(str.join(''));
        str = [];
       }
       newArgs.push(glyph);
      }
     }
     if (str.length > 0) {
      newArgs.push(str.join(''));
     }
     decArgs = [newArgs];
    }
    line.appendChild(c('td', fn));
    line.appendChild(c('td', JSON.stringify(simplifyArgs(decArgs))));
   }
   if (operatorsToDisplay < operatorList.fnArray.length) {
    line = c('tr');
    var lastCell = c('td', '...');
    lastCell.colspan = 4;
    chunk.appendChild(lastCell);
   }
   this.operatorListIdx = operatorList.fnArray.length;
   this.table.appendChild(chunk);
  },
  getNextBreakPoint: function getNextBreakPoint() {
   this.breakPoints.sort(function (a, b) {
    return a - b;
   });
   for (var i = 0; i < this.breakPoints.length; i++) {
    if (this.breakPoints[i] > this.currentIdx) {
     return this.breakPoints[i];
    }
   }
   return null;
  },
  breakIt: function breakIt(idx, callback) {
   StepperManager.selectStepper(this.pageIndex, true);
   var self = this;
   var dom = document;
   self.currentIdx = idx;
   var listener = function (e) {
    switch (e.keyCode) {
    case 83:
     dom.removeEventListener('keydown', listener);
     self.nextBreakPoint = self.currentIdx + 1;
     self.goTo(-1);
     callback();
     break;
    case 67:
     dom.removeEventListener('keydown', listener);
     var breakPoint = self.getNextBreakPoint();
     self.nextBreakPoint = breakPoint;
     self.goTo(-1);
     callback();
     break;
    }
   };
   dom.addEventListener('keydown', listener);
   self.goTo(idx);
  },
  goTo: function goTo(idx) {
   var allRows = this.panel.getElementsByClassName('line');
   for (var x = 0, xx = allRows.length; x < xx; ++x) {
    var row = allRows[x];
    if ((row.dataset.idx | 0) === idx) {
     row.style.backgroundColor = 'rgb(251,250,207)';
     row.scrollIntoView();
    } else {
     row.style.backgroundColor = null;
    }
   }
  }
 };
 return Stepper;
}();
var Stats = function Stats() {
 var stats = [];
 function clear(node) {
  while (node.hasChildNodes()) {
   node.removeChild(node.lastChild);
  }
 }
 function getStatIndex(pageNumber) {
  for (var i = 0, ii = stats.length; i < ii; ++i) {
   if (stats[i].pageNumber === pageNumber) {
    return i;
   }
  }
  return false;
 }
 return {
  id: 'Stats',
  name: 'Stats',
  panel: null,
  manager: null,
  init: function init(pdfjsLib) {
   this.panel.setAttribute('style', 'padding: 5px;');
   pdfjsLib.PDFJS.enableStats = true;
  },
  enabled: false,
  active: false,
  add: function (pageNumber, stat) {
   if (!stat) {
    return;
   }
   var statsIndex = getStatIndex(pageNumber);
   if (statsIndex !== false) {
    var b = stats[statsIndex];
    this.panel.removeChild(b.div);
    stats.splice(statsIndex, 1);
   }
   var wrapper = document.createElement('div');
   wrapper.className = 'stats';
   var title = document.createElement('div');
   title.className = 'title';
   title.textContent = 'Page: ' + pageNumber;
   var statsDiv = document.createElement('div');
   statsDiv.textContent = stat.toString();
   wrapper.appendChild(title);
   wrapper.appendChild(statsDiv);
   stats.push({
    pageNumber: pageNumber,
    div: wrapper
   });
   stats.sort(function (a, b) {
    return a.pageNumber - b.pageNumber;
   });
   clear(this.panel);
   for (var i = 0, ii = stats.length; i < ii; ++i) {
    this.panel.appendChild(stats[i].div);
   }
  },
  cleanup: function () {
   stats = [];
   clear(this.panel);
  }
 };
}();
var PDFBug = function PDFBugClosure() {
 var panelWidth = 300;
 var buttons = [];
 var activePanel = null;
 return {
  tools: [
   FontInspector,
   StepperManager,
   Stats
  ],
  enable: function (ids) {
   var all = false, tools = this.tools;
   if (ids.length === 1 && ids[0] === 'all') {
    all = true;
   }
   for (var i = 0; i < tools.length; ++i) {
    var tool = tools[i];
    if (all || ids.indexOf(tool.id) !== -1) {
     tool.enabled = true;
    }
   }
   if (!all) {
    tools.sort(function (a, b) {
     var indexA = ids.indexOf(a.id);
     indexA = indexA < 0 ? tools.length : indexA;
     var indexB = ids.indexOf(b.id);
     indexB = indexB < 0 ? tools.length : indexB;
     return indexA - indexB;
    });
   }
  },
  init: function init(pdfjsLib, container) {
   var ui = document.createElement('div');
   ui.id = 'PDFBug';
   var controls = document.createElement('div');
   controls.setAttribute('class', 'controls');
   ui.appendChild(controls);
   var panels = document.createElement('div');
   panels.setAttribute('class', 'panels');
   ui.appendChild(panels);
   container.appendChild(ui);
   container.style.right = panelWidth + 'px';
   var tools = this.tools;
   var self = this;
   for (var i = 0; i < tools.length; ++i) {
    var tool = tools[i];
    var panel = document.createElement('div');
    var panelButton = document.createElement('button');
    panelButton.textContent = tool.name;
    panelButton.addEventListener('click', function (selected) {
     return function (event) {
      event.preventDefault();
      self.selectPanel(selected);
     };
    }(i));
    controls.appendChild(panelButton);
    panels.appendChild(panel);
    tool.panel = panel;
    tool.manager = this;
    if (tool.enabled) {
     tool.init(pdfjsLib);
    } else {
     panel.textContent = tool.name + ' is disabled. To enable add ' + ' "' + tool.id + '" to the pdfBug parameter ' + 'and refresh (separate multiple by commas).';
    }
    buttons.push(panelButton);
   }
   this.selectPanel(0);
  },
  cleanup: function cleanup() {
   for (var i = 0, ii = this.tools.length; i < ii; i++) {
    if (this.tools[i].enabled) {
     this.tools[i].cleanup();
    }
   }
  },
  selectPanel: function selectPanel(index) {
   if (typeof index !== 'number') {
    index = this.tools.indexOf(index);
   }
   if (index === activePanel) {
    return;
   }
   activePanel = index;
   var tools = this.tools;
   for (var j = 0; j < tools.length; ++j) {
    if (j === index) {
     buttons[j].setAttribute('class', 'active');
     tools[j].active = true;
     tools[j].panel.removeAttribute('hidden');
    } else {
     buttons[j].setAttribute('class', '');
     tools[j].active = false;
     tools[j].panel.setAttribute('hidden', 'true');
    }
   }
  }
 };
}();