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	/* -- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -- */
	/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
	/* Copyright 2012 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.
	*/
	/* globals PDFJS */

	'use strict';

	var FontInspector = (function FontInspectorClosure() {
	var fonts;
	var panelWidth = 300;
	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 {
	// Properties/functions needed by PDFBug.
	id: 'FontInspector',
	name: 'Font Inspector',
	panel: null,
	manager: null,
	init: function init() {
	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);
	},
	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();
	}
	},
	// FontInspector specific functions.
	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 m = /url\(['"]?([^\)"']+)/.exec(url);
	var fontName = fontObj.loadedName;
	var font = document.createElement('div');
	var name = document.createElement('span');
	name.textContent = fontName;
	var download = document.createElement('a');
	download.href = m[1];
	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);
	// Somewhat of a hack, should probably add a hook for when the text layer
	// is done rendering.
	setTimeout(function() {
	if (this.active)
	resetSelection();
	}.bind(this), 2000);
	}
	};
	})();

	// Manages all the page steppers.
	var StepperManager = (function StepperManagerClosure() {
	var steppers = [];
	var stepperDiv = null;
	var stepperControls = null;
	var stepperChooser = null;
	var breakPoints = {};
	return {
	// Properties/functions needed by PDFBug.
	id: 'Stepper',
	name: 'Stepper',
	panel: null,
	manager: null,
	init: function init() {
	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'));
	},
	enabled: false,
	active: false,
	// Stepper specific functions.
	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) {
	if (selectPanel)
	this.manager.selectPanel(1);
	for (var 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 (var i = 0; i < options.length; ++i) {
	var option = options[i];
	option.selected = option.value == pageIndex;
	}
	},
	saveBreakPoints: function saveBreakPoints(pageIndex, bps) {
	breakPoints[pageIndex] = bps;
	sessionStorage.setItem('pdfjsBreakPoints', JSON.stringify(breakPoints));
	}
	};
	})();

	// The stepper for each page's IRQueue.
	var Stepper = (function StepperClosure() {
	// Shorter way to create element and optionally set textContent.
	function c(tag, textContent) {
	var d = document.createElement(tag);
	if (textContent)
	d.textContent = textContent;
	return d;
	}

	function glyphsToString(glyphs) {
	var out = '';
	for (var i = 0; i < glyphs.length; i++) {
	if (glyphs[i] === null) {
	out += ' ';
	} else {
	out += glyphs[i].fontChar;
	}
	}
	return out;
	}

	var opMap = null;

	var glyphCommands = {
	'showText': 0,
	'showSpacedText': 0,
	'nextLineShowText': 0,
	'nextLineSetSpacingShowText': 2
	};

	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() {
	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;
	if (!opMap) {
	opMap = Object.create(null);
	for (var key in PDFJS.OPS) {
	opMap[PDFJS.OPS[key]] = key;
	}
	}
	},
	updateOperatorList: function updateOperatorList(operatorList) {
	var self = this;
	for (var i = this.operatorListIdx; i < operatorList.fnArray.length; i++) {
	var line = c('tr');
	line.className = 'line';
	line.dataset.idx = i;
	this.table.appendChild(line);
	var checked = this.breakPoints.indexOf(i) != -1;
	var args = operatorList.argsArray[i] ? operatorList.argsArray[i] : [];

	var breakCell = c('td');
	var cbox = c('input');
	cbox.type = 'checkbox';
	cbox.className = 'points';
	cbox.checked = checked;
	cbox.onclick = (function(x) {
	return function() {
	if (this.checked)
	self.breakPoints.push(x);
	else
	self.breakPoints.splice(self.breakPoints.indexOf(x), 1);
	StepperManager.saveBreakPoints(self.pageIndex, self.breakPoints);
	};
	})(i);

	breakCell.appendChild(cbox);
	line.appendChild(breakCell);
	line.appendChild(c('td', i.toString()));
	var fn = opMap[operatorList.fnArray[i]];
	var decArgs = args;
	if (fn in glyphCommands) {
	var glyphIndex = glyphCommands[fn];
	var glyphs = args[glyphIndex];
	var decArgs = args.slice();
	var newArg;
	if (fn === 'showSpacedText') {
	newArg = [];
	for (var j = 0; j < glyphs.length; j++) {
	if (typeof glyphs[j] === 'number') {
	newArg.push(glyphs[j]);
	} else {
	newArg.push(glyphsToString(glyphs[j]));
	}
	}
	} else {
	newArg = glyphsToString(glyphs);
	}
	decArgs[glyphIndex] = newArg;
	}
	line.appendChild(c('td', fn));
	line.appendChild(c('td', JSON.stringify(decArgs)));
	}
	},
	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: // step
	dom.removeEventListener('keydown', listener, false);
	self.nextBreakPoint = self.currentIdx + 1;
	self.goTo(-1);
	callback();
	break;
	case 67: // continue
	dom.removeEventListener('keydown', listener, false);
	var breakPoint = self.getNextBreakPoint();
	self.nextBreakPoint = breakPoint;
	self.goTo(-1);
	callback();
	break;
	}
	};
	dom.addEventListener('keydown', listener, false);
	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 == 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 {
	// Properties/functions needed by PDFBug.
	id: 'Stats',
	name: 'Stats',
	panel: null,
	manager: null,
	init: function init() {
	this.panel.setAttribute('style', 'padding: 5px;');
	PDFJS.enableStats = true;
	},
	enabled: false,
	active: false,
	// Stats specific functions.
	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);
	}
	};
	})();

	// Manages all the debugging tools.
	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) {
	// Sort the tools by the order they are enabled.
	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() {
	/*
	* Basic Layout:
	* PDFBug
	* Controls
	* Panels
	* Panel
	* Panel
	* ...
	*/
	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);

	var container = document.getElementById('viewerContainer');
	container.appendChild(ui);
	container.style.right = panelWidth + 'px';

	// Initialize all the debugging tools.
	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();
	else
	panel.textContent = tool.name + ' is disabled. To enable add ' +
	' "' + tool.id + '" to the pdfBug parameter ' +
	'and refresh (seperate multiple by commas).';
	buttons.push(panelButton);
	}
	this.selectPanel(0);
	},
	selectPanel: function selectPanel(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');
	}
	}
	}
	};
	})();

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