From: Alex Sadleir Date: Sat, 05 Oct 2013 06:36:28 +0000 Subject: Initial Commit X-Git-Url: https://maxious.lambdacomplex.org/git/?p=ckanext-dga-stats.git&a=commitdiff&h=1abda25ff0f05f6afe33b6090cd1cdc051d20bc0 --- Initial Commit --- --- /dev/null +++ b/ckanext/dga-stats/__init__.py @@ -1,1 +1,2 @@ +# empty file needed for pylons to find templates in this directory --- /dev/null +++ b/ckanext/dga-stats/controller.py @@ -1,1 +1,51 @@ +import ckan.plugins as p +from ckan.lib.base import BaseController, config +import stats as stats_lib +import ckan.lib.helpers as h +class StatsController(BaseController): + + def index(self): + c = p.toolkit.c + stats = stats_lib.Stats() + rev_stats = stats_lib.RevisionStats() + c.top_rated_packages = stats.top_rated_packages() + c.most_edited_packages = stats.most_edited_packages() + c.largest_groups = stats.largest_groups() + c.top_tags = stats.top_tags() + c.top_package_owners = stats.top_package_owners() + c.new_packages_by_week = rev_stats.get_by_week('new_packages') + c.deleted_packages_by_week = rev_stats.get_by_week('deleted_packages') + c.num_packages_by_week = rev_stats.get_num_packages_by_week() + c.package_revisions_by_week = rev_stats.get_by_week('package_revisions') + + # Used in the legacy CKAN templates. + c.packages_by_week = [] + + # Used in new CKAN templates gives more control to the templates for formatting. + c.raw_packages_by_week = [] + for week_date, num_packages, cumulative_num_packages in c.num_packages_by_week: + c.packages_by_week.append('[new Date(%s), %s]' % (week_date.replace('-', ','), cumulative_num_packages)) + c.raw_packages_by_week.append({'date': h.date_str_to_datetime(week_date), 'total_packages': cumulative_num_packages}) + + c.all_package_revisions = [] + c.raw_all_package_revisions = [] + for week_date, revs, num_revisions, cumulative_num_revisions in c.package_revisions_by_week: + c.all_package_revisions.append('[new Date(%s), %s]' % (week_date.replace('-', ','), num_revisions)) + c.raw_all_package_revisions.append({'date': h.date_str_to_datetime(week_date), 'total_revisions': num_revisions}) + + c.new_datasets = [] + c.raw_new_datasets = [] + for week_date, pkgs, num_packages, cumulative_num_packages in c.new_packages_by_week: + c.new_datasets.append('[new Date(%s), %s]' % (week_date.replace('-', ','), num_packages)) + c.raw_new_datasets.append({'date': h.date_str_to_datetime(week_date), 'new_packages': num_packages}) + + return p.toolkit.render('ckanext/stats/index.html') + + def leaderboard(self, id=None): + c = p.toolkit.c + c.solr_core_url = config.get('ckanext.stats.solr_core_url', + 'http://solr.okfn.org/solr/ckan') + return p.toolkit.render('ckanext/stats/leaderboard.html') + + --- /dev/null +++ b/ckanext/dga-stats/plugin.py @@ -1,1 +1,28 @@ +from logging import getLogger +import ckan.plugins as p + +log = getLogger(__name__) + +class StatsPlugin(p.SingletonPlugin): + '''Stats plugin.''' + + p.implements(p.IRoutes, inherit=True) + p.implements(p.IConfigurer, inherit=True) + + def after_map(self, map): + map.connect('stats', '/stats', + controller='ckanext.stats.controller:StatsController', + action='index') + map.connect('stats_action', '/stats/{action}', + controller='ckanext.stats.controller:StatsController') + return map + + def update_config(self, config): + templates = 'templates' + if p.toolkit.asbool(config.get('ckan.legacy_templates', False)): + templates = 'templates_legacy' + p.toolkit.add_template_directory(config, templates) + p.toolkit.add_public_directory(config, 'public') + p.toolkit.add_resource('public/ckanext/stats', 'ckanext_stats') + --- /dev/null +++ b/ckanext/dga-stats/public/.gitignore @@ -1,1 +1,3 @@ +**.min.js +**.min.css --- /dev/null +++ b/ckanext/dga-stats/public/__init__.py @@ -1,1 +1,8 @@ +# this is a namespace package +try: + import pkg_resources + pkg_resources.declare_namespace(__name__) +except ImportError: + import pkgutil + __path__ = pkgutil.extend_path(__path__, __name__) --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/__init__.py @@ -1,1 +1,8 @@ +# this is a namespace package +try: + import pkg_resources + pkg_resources.declare_namespace(__name__) +except ImportError: + import pkgutil + __path__ = pkgutil.extend_path(__path__, __name__) --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/__init__.py @@ -1,1 +1,8 @@ +# this is a namespace package +try: + import pkg_resources + pkg_resources.declare_namespace(__name__) +except ImportError: + import pkgutil + __path__ = pkgutil.extend_path(__path__, __name__) --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/app.js @@ -1,1 +1,60 @@ +jQuery(document).ready(function($) { + $('form').submit(function(e) { + e.preventDefault(); + attribute = $('#form-attribute').val(); + loadSolr(attribute); + }) + // default! (also in html) + loadSolr('tags'); + function loadSolr(attribute) { + var url = solrCoreUrl + '/select?indent=on&wt=json&facet=true&rows=0&indent=true&facet.mincount=1&facet.limit=30&q=*:*&facet.field=' + attribute; + function handleSolr(data) { + var results = []; + ourdata = data.facet_counts.facet_fields[attribute]; + var newrow = {}; + for (ii in ourdata) { + if (ii % 2 == 0) { + newrow.name = ourdata[ii]; + if (!newrow.name) { + newrow.name = '[Not Specified]'; + } + } else { + newrow.count = ourdata[ii]; + results.push(newrow); + newrow = {}; + } + } + display(results); + } + + $.ajax({ + url: url, + success: handleSolr, + dataType: 'jsonp', + jsonp: 'json.wrf' + }); + } + + function display(results) { + var list = $('#category-counts'); + list.html(''); + if (results.length == 0) { + return + } + var maximum = results[0]['count']; + for(ii in results) { + maximum = Math.max(maximum, results[ii]['count']); + } + + $.each(results, function(idx, row) { + var newentry = $('
  • '); + newentry.append($('' + row['name'] + '')); + newentry.append($('' + row['count'] + '')); + var percent = 100 * row['count'] / maximum; + newentry.append($('')); + list.append(newentry); + }); + } +}); + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/css/stats.css @@ -1,1 +1,17 @@ +.tab-content h2 { + margin-bottom: 12px; +} +.js .tab-content { + padding-top: 20px; + padding-bottom: 20px; + margin-top: 0; +} + +.module-plot-canvas { + display: block; + width: 650px; + height: 300px; + margin: 20px 0; +} + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/demo.html @@ -1,1 +1,26 @@ + + + + + + + + +

    CKAN Dataset Leaderboard

    +

    Choose a dataset attribute and find out which categories in that area have the most datasets. E.g. tags, groups, license, res_format, country.

    +
    + + + +
    + +
    +
      +
    +
    + + + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/javascript/modules/plot.js @@ -1,1 +1,210 @@ - +/* A quick module for generating flot charts from an HTML table. Options can + * be passed directly to flot using the data-module-* attributes. The tables + * are currently expected to be marked up as follows: + * + * + * + * + * + * + * + * + * + * + * + * + * + * + * + * ... + * + *
    X AxisSeries A LegendSeries B Legend
    X ValueSeries A Y ValueSeries B Y Value
    + * + * Points are pulled out of the th/td elements using innerHTML or by looking + * for a data-value attribute. This is useful when a more readable value + * needs to be used in the elements contents (eg. dates). A data-type attribute + * can also be applied to parse the value. Only data-type="date" is currently + * supported and expects data-value to be a unix timestamp. + */ +this.ckan.module('plot', function (jQuery, _) { + return { + /* Holds the jQuery.plot() object when created */ + graph: null, + + /* Holds the canvas container when created */ + canvas: null, + + /* Default options */ + options: { + xaxis: {}, + yaxis: {}, + legend: {position: 'nw'}, + colors: ['#ffcc33', '#ff8844'] + }, + + /* Sets up the canvas element and parses the table. + * + * Returns nothing. + */ + initialize: function () { + jQuery.proxyAll(this, /_on/); + + if (!this.el.is('table')) { + throw new Error('CKAN module plot can only be called on table elements'); + } + + this.setupCanvas(); + + // Because the canvas doesn't render correctly unless visible we must + // listen for events that reveal the canvas and then try and re-render. + // Currently the most common of these is the "shown" event triggered by + // the tabs plugin. + this.sandbox.body.on("shown", this._onShown); + this.data = this.parseTable(this.el); + + this.draw(); + }, + + /* Removes event handlers when the module is removed from the DOM. + * + * Returns nothing. + */ + teardown: function () { + this.sandbox.body.off("shown", this._onShown); + }, + + /* Creates the canvas wrapper and removes the table from the document. + * + * Returns nothing. + */ + setupCanvas: function () { + this.canvas = jQuery('
    '); + this.el.replaceWith(this.canvas); + }, + + /* Attempts to draw the chart if the canvas is visible. If not visible the + * graph does not render correctly. So we keep trying until it is. + * + * Examples + * + * module.draw(); + * + * Returns nothing. + */ + draw: function () { + if (!this.drawn && this.canvas.is(':visible')) { + this.graph = jQuery.plot(this.canvas, this.data, this.options); + } + }, + + /* Parses an HTML table element to build the data array for the chart. + * The thead element provides the axis and labels for the series. The + * first column in the tbody is used for the x-axis and subsequent + * columns are the series. + * + * table - A table element to parse. + * + * Examples + * + * module.parseTable(module.el); + * + * Returns data object suitable for use in jQuery.plot(). + */ + parseTable: function (table) { + var data = []; + var _this = this; + + var headings = table.find('thead tr:first th').map(function () { + return this.innerHTML; + }); + + table.find('tbody tr').each(function (row) { + var element = jQuery(this); + var x = []; + + x[row] = _this.getValue(element.find('th')); + + element.find('td').each(function (series) { + var value = _this.getValue(this); + var label = headings[series + 1]; + + data[series] = data[series] || {data: [], label: label}; + data[series].data[row] = [x[row], value]; + }); + }); + + return data; + }, + + /* Retrieves the value from a td/th element. This first looks for a + * data-value attribute on the element otherwise uses the element + * text contents. + * + * A data-type attribute can also be provided to tell the module how + * to deal with the element. By default we let jQuery.data() handle + * the parsing but this can provide additional data. See .parseValue() + * for more info. + * + * cell - An element to extract a value from. + * + * Examples + * + * var element = jQuery('Ten'); + * module.getValue(element); //=> 10 + * + * var element = jQuery('20'); + * module.getValue(element); //=> 20 + * + * var element = jQuery('1343747094'); + * module.getValue(element); //=> + * + * Returns the parsed value. + */ + getValue: function (cell) { + var item = cell instanceof jQuery ? cell : jQuery(cell); + var type = item.data('type') || 'string'; + var value = item.data('value') || item.text(); + return this.parseValue(value, type); + }, + + /* Provides the ability to further format a value. + * + * If date is provided as a type then it expects value to be a unix + * timestamp in seconds. + * + * value - The value extracted from the element. + * type - A type string, currently only supports "date". + * + * Examples + * + * module.parseValue(10); // => 10 + * module.parseValue("cat"); // => "cat" + * module.parseValue(1343747094, 'date'); // => + * + * Returns the parsed value. + */ + parseValue: function (value, type) { + if (type === 'date') { + value = new Date(parseInt(value, 10) * 1000); + if (!value) { + value = 0; + } + } + return value; + }, + + /* Event handler for when tabs are toggled. Determines if the canvas + * resides in the shown element and attempts to re-render. + * + * event - The shown event object. + * + * Returns nothing. + */ + _onShown: function (event) { + if (!this.drawn && jQuery.contains(jQuery(event.target.hash)[0], this.canvas[0])) { + this.draw(); + } + } + }; +}); + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/javascript/modules/stats-nav.js @@ -1,1 +1,37 @@ +/* Quick module to enhance the Bootstrap tags plug-in to update the url + * hash when a tab changes to allow the user to bookmark the page. + * + * Each tab id must use a prefix which which will be stripped from the hash. + * This is to prevent the page jumping when the hash fragment changes. + * + * prefix - The prefix used on the ids. + * + */ +this.ckan.module('stats-nav', { + /* An options object */ + options: { + prefix: 'stats-' + }, + /* Initializes the module and sets up event listeners. + * + * Returns nothing. + */ + initialize: function () { + var location = this.sandbox.location; + var prefix = this.options.prefix; + var hash = location.hash.slice(1); + var selected = this.$('[href^=#' + prefix + hash + ']'); + + // Update the hash fragment when the tab changes. + this.el.on('shown', function (event) { + location.hash = event.target.hash.slice(prefix.length + 1); + }); + + // Show the current tab if the location provides one. + if (selected.length) { + selected.tab('show'); + } + } +}); + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/resource.config @@ -1,1 +1,13 @@ +[IE conditional] +lte IE 8 = vendor/excanvas.js + +[groups] + +stats = + css/stats.css + vendor/excanvas.js + vendor/jquery.flot.js + javascript/modules/plot.js + javascript/modules/stats-nav.js + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/style.css @@ -1,1 +1,60 @@ +div.category-counts { +} +div.category-counts-over-time { + clear: both; +} + +/*************************** + * CHART LISTS + **************************/ + +.chartlist { + float: left; + border-top: 1px solid #EEE; + width: 90%; + padding-left: 0; + margin-left: 0; +} + +.chartlist li { + position: relative; + display: block; + border-bottom: 1px solid #EEE; + _zoom: 1; +} +.chartlist li a { + display: block; + padding: 0.4em 4.5em 0.4em 0.5em; + position: relative; + z-index: 2; +} +.chartlist .count { + display: block; + position: absolute; + top: 0; + right: 0; + margin: 0 0.3em; + text-align: right; + color: #999; + font-weight: bold; + font-size: 0.875em; + line-height: 2em; + z-index: 999; +} +.chartlist .index { + display: block; + position: absolute; + top: 0; + left: 0; + height: 100%; + background: #B8E4F5; + text-indent: -9999px; + overflow: hidden; + line-height: 2em; +} +.chartlist li:hover { + background: #EFEFEF; +} + + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/test/fixtures/table.html @@ -1,1 +1,31 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
    X AxisSeries A LegendSeries B Legend
    Apr 09, 2007207
    Apr 16, 2007126
    Apr 23, 20072712
    + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/test/index.html @@ -1,1 +1,60 @@ + + + + + Mocha Tests + + + +
    +
    + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/test/spec/modules/plot.spec.js @@ -1,1 +1,137 @@ +/*globals describe before beforeEach afterEach it assert sinon ckan jQuery */ +describe('ckan.module.PlotModule()', function () { + var PlotModule = ckan.module.registry['plot']; + before(function (done) { + var _this = this; + + jQuery.get('./fixtures/table.html', function (html) { + _this.template = html; + done(); + }); + }); + + beforeEach(function () { + this.el = jQuery(this.template).appendTo(this.fixture); + this.sandbox = ckan.sandbox(); + this.sandbox.body = this.fixture; + this.module = new PlotModule(this.el, {}, this.sandbox); + }); + + afterEach(function () { + this.module.teardown(); + }); + + describe('.initialize()', function () { + it('should setup the canvas element', function () { + var target = sinon.stub(this.module, 'setupCanvas', this.module.setupCanvas); + + this.module.initialize(); + assert.called(target); + }); + + it('should draw the graph', function () { + var target = sinon.stub(this.module, 'draw'); + + this.module.initialize(); + assert.called(target); + }); + + it('should listen for "shown" events on the body', function () { + var target = sinon.stub(this.sandbox.body, 'on'); + + this.module.initialize(); + assert.called(target); + assert.calledWith(target, "shown", this.module._onShown); + }); + }); + + describe('.teardown()', function () { + it('should remove "shown" listeners from the body', function () { + var target = sinon.stub(this.sandbox.body, 'off'); + + this.module.teardown(); + assert.called(target); + assert.calledWith(target, "shown", this.module._onShown); + }); + }); + + describe('.setupCanvas()', function () { + it('should create the .canvas element', function () { + this.module.setupCanvas(); + + assert.isDefined(this.module.canvas); + assert.isDefined(this.module.canvas.is('div')); + }); + + it('should replace the .el with the .canvas', function () { + this.module.setupCanvas(); + assert.ok(jQuery.contains(this.sandbox.body[0], this.module.canvas[0])); + }); + }); + + describe('.draw()', function () { + beforeEach(function () { + this.plot = {}; + this.module.canvas = jQuery('
    ').appendTo(this.fixture); + jQuery.plot = sinon.stub().returns(this.plot); + }); + + it('should call jQuery.plot() if the canvas is visible', function () { + this.module.draw(); + + assert.called(jQuery.plot); + assert.calledWith(jQuery.plot, this.module.canvas, this.module.data, this.module.options); + }); + + it('should assign the .graph property', function () { + this.module.draw(); + assert.strictEqual(this.module.graph, this.plot); + }); + + it('should not call jQuery.plot() if the canvas is not visible', function () { + this.module.canvas.hide(); + this.module.draw(); + + assert.notCalled(jQuery.plot); + }); + }); + + describe('.parseTable(table)', function () { + it('should parse the contents of the provided table', function () { + var target = this.module.parseTable(this.module.el); + + assert.deepEqual(target, [{ + label: 'Series A Legend', + data: [ + [new Date(1176073200000), "20"], + [new Date(1176678000000), "12"], + [new Date(1177282800000), "27"] + ] + }, { + label: 'Series B Legend', + data: [ + [new Date(1176073200000), "7"], + [new Date(1176678000000), "6"], + [new Date(1177282800000), "12"] + ] + }]); + }); + }); + + describe('.getValue(cell)', function () { + it('should extract the value from a table cell'); + it('should use the data-value attribute if present'); + it('should parse the value using the data-type'); + }); + + describe('.parseValue(value, type)', function () { + it('should create a date object if type == "date"'); + it('should return the value if the type is not recognised'); + }); + + describe('._onShown(event)', function () { + it('should call .draw() if the event.target contains the canvas'); + }); +}); + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/test/spec/modules/stats-nav.spec.js @@ -1,1 +1,45 @@ +/*globals describe before beforeEach afterEach it assert sinon ckan jQuery */ +describe('ckan.module.StatsNavModule()', function () { + var StatsNavModule = ckan.module.registry['stats-nav']; + beforeEach(function () { + this.el = document.createElement('div'); + this.sandbox = ckan.sandbox(); + this.sandbox.body = this.fixture; + this.sandbox.location = { + href: '', + hash: '' + }; + this.module = new StatsNavModule(this.el, {}, this.sandbox); + + jQuery.fn.tab = sinon.stub(); + }); + + afterEach(function () { + this.module.teardown(); + + delete jQuery.fn.tab; + }); + + describe('.initialize()', function () { + it('should listen for shown events and update the location.hash', function () { + var anchor = jQuery('').attr('href', '#stats-test')[0]; + + this.module.initialize(); + this.module.el.trigger({type: 'shown', target: anchor}); + + assert.equal(this.sandbox.location.hash, 'test'); + }); + + it('should select the tab from the location hash on init', function () { + var anchor = jQuery('').attr('href', '#stats-test').appendTo(this.el); + + this.sandbox.location.hash = '#test'; + this.module.initialize(); + + assert.called(jQuery.fn.tab); + assert.calledWith(jQuery.fn.tab, 'show'); + }); + }); +}); + --- /dev/null +++ b/ckanext/dga-stats/public/ckanext/stats/vendor/excanvas.js @@ -1,1 +1,1428 @@ - +// Copyright 2006 Google Inc. +// +// 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. + + +// Known Issues: +// +// * Patterns only support repeat. +// * Radial gradient are not implemented. The VML version of these look very +// different from the canvas one. +// * Clipping paths are not implemented. +// * Coordsize. The width and height attribute have higher priority than the +// width and height style values which isn't correct. +// * Painting mode isn't implemented. +// * Canvas width/height should is using content-box by default. IE in +// Quirks mode will draw the canvas using border-box. Either change your +// doctype to HTML5 +// (http://www.whatwg.org/specs/web-apps/current-work/#the-doctype) +// or use Box Sizing Behavior from WebFX +// (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html) +// * Non uniform scaling does not correctly scale strokes. +// * Filling very large shapes (above 5000 points) is buggy. +// * Optimize. There is always room for speed improvements. + +// Only add this code if we do not already have a canvas implementation +if (!document.createElement('canvas').getContext) { + +(function() { + + // alias some functions to make (compiled) code shorter + var m = Math; + var mr = m.round; + var ms = m.sin; + var mc = m.cos; + var abs = m.abs; + var sqrt = m.sqrt; + + // this is used for sub pixel precision + var Z = 10; + var Z2 = Z / 2; + + /** + * This funtion is assigned to the elements as element.getContext(). + * @this {HTMLElement} + * @return {CanvasRenderingContext2D_} + */ + function getContext() { + return this.context_ || + (this.context_ = new CanvasRenderingContext2D_(this)); + } + + var slice = Array.prototype.slice; + + /** + * Binds a function to an object. The returned function will always use the + * passed in {@code obj} as {@code this}. + * + * Example: + * + * g = bind(f, obj, a, b) + * g(c, d) // will do f.call(obj, a, b, c, d) + * + * @param {Function} f The function to bind the object to + * @param {Object} obj The object that should act as this when the function + * is called + * @param {*} var_args Rest arguments that will be used as the initial + * arguments when the function is called + * @return {Function} A new function that has bound this + */ + function bind(f, obj, var_args) { + var a = slice.call(arguments, 2); + return function() { + return f.apply(obj, a.concat(slice.call(arguments))); + }; + } + + function encodeHtmlAttribute(s) { + return String(s).replace(/&/g, '&').replace(/"/g, '"'); + } + + function addNamespacesAndStylesheet(doc) { + // create xmlns + if (!doc.namespaces['g_vml_']) { + doc.namespaces.add('g_vml_', 'urn:schemas-microsoft-com:vml', + '#default#VML'); + + } + if (!doc.namespaces['g_o_']) { + doc.namespaces.add('g_o_', 'urn:schemas-microsoft-com:office:office', + '#default#VML'); + } + + // Setup default CSS. Only add one style sheet per document + if (!doc.styleSheets['ex_canvas_']) { + var ss = doc.createStyleSheet(); + ss.owningElement.id = 'ex_canvas_'; + ss.cssText = 'canvas{display:inline-block;overflow:hidden;' + + // default size is 300x150 in Gecko and Opera + 'text-align:left;width:300px;height:150px}'; + } + } + + // Add namespaces and stylesheet at startup. + addNamespacesAndStylesheet(document); + + var G_vmlCanvasManager_ = { + init: function(opt_doc) { + if (/MSIE/.test(navigator.userAgent) && !window.opera) { + var doc = opt_doc || document; + // Create a dummy element so that IE will allow canvas elements to be + // recognized. + doc.createElement('canvas'); + doc.attachEvent('onreadystatechange', bind(this.init_, this, doc)); + } + }, + + init_: function(doc) { + // find all canvas elements + var els = doc.getElementsByTagName('canvas'); + for (var i = 0; i < els.length; i++) { + this.initElement(els[i]); + } + }, + + /** + * Public initializes a canvas element so that it can be used as canvas + * element from now on. This is called automatically before the page is + * loaded but if you are creating elements using createElement you need to + * make sure this is called on the element. + * @param {HTMLElement} el The canvas element to initialize. + * @return {HTMLElement} the element that was created. + */ + initElement: function(el) { + if (!el.getContext) { + el.getContext = getContext; + + // Add namespaces and stylesheet to document of the element. + addNamespacesAndStylesheet(el.ownerDocument); + + // Remove fallback content. There is no way to hide text nodes so we + // just remove all childNodes. We could hide all elements and remove + // text nodes but who really cares about the fallback content. + el.innerHTML = ''; + + // do not use inline function because that will leak memory + el.attachEvent('onpropertychange', onPropertyChange); + el.attachEvent('onresize', onResize); + + var attrs = el.attributes; + if (attrs.width && attrs.width.specified) { + // TODO: use runtimeStyle and coordsize + // el.getContext().setWidth_(attrs.width.nodeValue); + el.style.width = attrs.width.nodeValue + 'px'; + } else { + el.width = el.clientWidth; + } + if (attrs.height && attrs.height.specified) { + // TODO: use runtimeStyle and coordsize + // el.getContext().setHeight_(attrs.height.nodeValue); + el.style.height = attrs.height.nodeValue + 'px'; + } else { + el.height = el.clientHeight; + } + //el.getContext().setCoordsize_() + } + return el; + } + }; + + function onPropertyChange(e) { + var el = e.srcElement; + + switch (e.propertyName) { + case 'width': + el.getContext().clearRect(); + el.style.width = el.attributes.width.nodeValue + 'px'; + // In IE8 this does not trigger onresize. + el.firstChild.style.width = el.clientWidth + 'px'; + break; + case 'height': + el.getContext().clearRect(); + el.style.height = el.attributes.height.nodeValue + 'px'; + el.firstChild.style.height = el.clientHeight + 'px'; + break; + } + } + + function onResize(e) { + var el = e.srcElement; + if (el.firstChild) { + el.firstChild.style.width = el.clientWidth + 'px'; + el.firstChild.style.height = el.clientHeight + 'px'; + } + } + + G_vmlCanvasManager_.init(); + + // precompute "00" to "FF" + var decToHex = []; + for (var i = 0; i < 16; i++) { + for (var j = 0; j < 16; j++) { + decToHex[i * 16 + j] = i.toString(16) + j.toString(16); + } + } + + function createMatrixIdentity() { + return [ + [1, 0, 0], + [0, 1, 0], + [0, 0, 1] + ]; + } + + function matrixMultiply(m1, m2) { + var result = createMatrixIdentity(); + + for (var x = 0; x < 3; x++) { + for (var y = 0; y < 3; y++) { + var sum = 0; + + for (var z = 0; z < 3; z++) { + sum += m1[x][z] * m2[z][y]; + } + + result[x][y] = sum; + } + } + return result; + } + + function copyState(o1, o2) { + o2.fillStyle = o1.fillStyle; + o2.lineCap = o1.lineCap; + o2.lineJoin = o1.lineJoin; + o2.lineWidth = o1.lineWidth; + o2.miterLimit = o1.miterLimit; + o2.shadowBlur = o1.shadowBlur; + o2.shadowColor = o1.shadowColor; + o2.shadowOffsetX = o1.shadowOffsetX; + o2.shadowOffsetY = o1.shadowOffsetY; + o2.strokeStyle = o1.strokeStyle; + o2.globalAlpha = o1.globalAlpha; + o2.font = o1.font; + o2.textAlign = o1.textAlign; + o2.textBaseline = o1.textBaseline; + o2.arcScaleX_ = o1.arcScaleX_; + o2.arcScaleY_ = o1.arcScaleY_; + o2.lineScale_ = o1.lineScale_; + } + + var colorData = { + aliceblue: '#F0F8FF', + antiquewhite: '#FAEBD7', + aquamarine: '#7FFFD4', + azure: '#F0FFFF', + beige: '#F5F5DC', + bisque: '#FFE4C4', + black: '#000000', + blanchedalmond: '#FFEBCD', + blueviolet: '#8A2BE2', + brown: '#A52A2A', + burlywood: '#DEB887', + cadetblue: '#5F9EA0', + chartreuse: '#7FFF00', + chocolate: '#D2691E', + coral: '#FF7F50', + cornflowerblue: '#6495ED', + cornsilk: '#FFF8DC', + crimson: '#DC143C', + cyan: '#00FFFF', + darkblue: '#00008B', + darkcyan: '#008B8B', + darkgoldenrod: '#B8860B', + darkgray: '#A9A9A9', + darkgreen: '#006400', + darkgrey: '#A9A9A9', + darkkhaki: '#BDB76B', + darkmagenta: '#8B008B', + darkolivegreen: '#556B2F', + darkorange: '#FF8C00', + darkorchid: '#9932CC', + darkred: '#8B0000', + darksalmon: '#E9967A', + darkseagreen: '#8FBC8F', + darkslateblue: '#483D8B', + darkslategray: '#2F4F4F', + darkslategrey: '#2F4F4F', + darkturquoise: '#00CED1', + darkviolet: '#9400D3', + deeppink: '#FF1493', + deepskyblue: '#00BFFF', + dimgray: '#696969', + dimgrey: '#696969', + dodgerblue: '#1E90FF', + firebrick: '#B22222', + floralwhite: '#FFFAF0', + forestgreen: '#228B22', + gainsboro: '#DCDCDC', + ghostwhite: '#F8F8FF', + gold: '#FFD700', + goldenrod: '#DAA520', + grey: '#808080', + greenyellow: '#ADFF2F', + honeydew: '#F0FFF0', + hotpink: '#FF69B4', + indianred: '#CD5C5C', + indigo: '#4B0082', + ivory: '#FFFFF0', + khaki: '#F0E68C', + lavender: '#E6E6FA', + lavenderblush: '#FFF0F5', + lawngreen: '#7CFC00', + lemonchiffon: '#FFFACD', + lightblue: '#ADD8E6', + lightcoral: '#F08080', + lightcyan: '#E0FFFF', + lightgoldenrodyellow: '#FAFAD2', + lightgreen: '#90EE90', + lightgrey: '#D3D3D3', + lightpink: '#FFB6C1', + lightsalmon: '#FFA07A', + lightseagreen: '#20B2AA', + lightskyblue: '#87CEFA', + lightslategray: '#778899', + lightslategrey: '#778899', + lightsteelblue: '#B0C4DE', + lightyellow: '#FFFFE0', + limegreen: '#32CD32', + linen: '#FAF0E6', + magenta: '#FF00FF', + mediumaquamarine: '#66CDAA', + mediumblue: '#0000CD', + mediumorchid: '#BA55D3', + mediumpurple: '#9370DB', + mediumseagreen: '#3CB371', + mediumslateblue: '#7B68EE', + mediumspringgreen: '#00FA9A', + mediumturquoise: '#48D1CC', + mediumvioletred: '#C71585', + midnightblue: '#191970', + mintcream: '#F5FFFA', + mistyrose: '#FFE4E1', + moccasin: '#FFE4B5', + navajowhite: '#FFDEAD', + oldlace: '#FDF5E6', + olivedrab: '#6B8E23', + orange: '#FFA500', + orangered: '#FF4500', + orchid: '#DA70D6', + palegoldenrod: '#EEE8AA', + palegreen: '#98FB98', + paleturquoise: '#AFEEEE', + palevioletred: '#DB7093', + papayawhip: '#FFEFD5', + peachpuff: '#FFDAB9', + peru: '#CD853F', + pink: '#FFC0CB', + plum: '#DDA0DD', + powderblue: '#B0E0E6', + rosybrown: '#BC8F8F', + royalblue: '#4169E1', + saddlebrown: '#8B4513', + salmon: '#FA8072', + sandybrown: '#F4A460', + seagreen: '#2E8B57', + seashell: '#FFF5EE', + sienna: '#A0522D', + skyblue: '#87CEEB', + slateblue: '#6A5ACD', + slategray: '#708090', + slategrey: '#708090', + snow: '#FFFAFA', + springgreen: '#00FF7F', + steelblue: '#4682B4', + tan: '#D2B48C', + thistle: '#D8BFD8', + tomato: '#FF6347', + turquoise: '#40E0D0', + violet: '#EE82EE', + wheat: '#F5DEB3', + whitesmoke: '#F5F5F5', + yellowgreen: '#9ACD32' + }; + + + function getRgbHslContent(styleString) { + var start = styleString.indexOf('(', 3); + var end = styleString.indexOf(')', start + 1); + var parts = styleString.substring(start + 1, end).split(','); + // add alpha if needed + if (parts.length == 4 && styleString.substr(3, 1) == 'a') { + alpha = Number(parts[3]); + } else { + parts[3] = 1; + } + return parts; + } + + function percent(s) { + return parseFloat(s) / 100; + } + + function clamp(v, min, max) { + return Math.min(max, Math.max(min, v)); + } + + function hslToRgb(parts){ + var r, g, b; + h = parseFloat(parts[0]) / 360 % 360; + if (h < 0) + h++; + s = clamp(percent(parts[1]), 0, 1); + l = clamp(percent(parts[2]), 0, 1); + if (s == 0) { + r = g = b = l; // achromatic + } else { + var q = l < 0.5 ? l * (1 + s) : l + s - l * s; + var p = 2 * l - q; + r = hueToRgb(p, q, h + 1 / 3); + g = hueToRgb(p, q, h); + b = hueToRgb(p, q, h - 1 / 3); + } + + return '#' + decToHex[Math.floor(r * 255)] + + decToHex[Math.floor(g * 255)] + + decToHex[Math.floor(b * 255)]; + } + + function hueToRgb(m1, m2, h) { + if (h < 0) + h++; + if (h > 1) + h--; + + if (6 * h < 1) + return m1 + (m2 - m1) * 6 * h; + else if (2 * h < 1) + return m2; + else if (3 * h < 2) + return m1 + (m2 - m1) * (2 / 3 - h) * 6; + else + return m1; + } + + function processStyle(styleString) { + var str, alpha = 1; + + styleString = String(styleString); + if (styleString.charAt(0) == '#') { + str = styleString; + } else if (/^rgb/.test(styleString)) { + var parts = getRgbHslContent(styleString); + var str = '#', n; + for (var i = 0; i < 3; i++) { + if (parts[i].indexOf('%') != -1) { + n = Math.floor(percent(parts[i]) * 255); + } else { + n = Number(parts[i]); + } + str += decToHex[clamp(n, 0, 255)]; + } + alpha = parts[3]; + } else if (/^hsl/.test(styleString)) { + var parts = getRgbHslContent(styleString); + str = hslToRgb(parts); + alpha = parts[3]; + } else { + str = colorData[styleString] || styleString; + } + return {color: str, alpha: alpha}; + } + + var DEFAULT_STYLE = { + style: 'normal', + variant: 'normal', + weight: 'normal', + size: 10, + family: 'sans-serif' + }; + + // Internal text style cache + var fontStyleCache = {}; + + function processFontStyle(styleString) { + if (fontStyleCache[styleString]) { + return fontStyleCache[styleString]; + } + + var el = document.createElement('div'); + var style = el.style; + try { + style.font = styleString; + } catch (ex) { + // Ignore failures to set to invalid font. + } + + return fontStyleCache[styleString] = { + style: style.fontStyle || DEFAULT_STYLE.style, + variant: style.fontVariant || DEFAULT_STYLE.variant, + weight: style.fontWeight || DEFAULT_STYLE.weight, + size: style.fontSize || DEFAULT_STYLE.size, + family: style.fontFamily || DEFAULT_STYLE.family + }; + } + + function getComputedStyle(style, element) { + var computedStyle = {}; + + for (var p in style) { + computedStyle[p] = style[p]; + } + + // Compute the size + var canvasFontSize = parseFloat(element.currentStyle.fontSize), + fontSize = parseFloat(style.size); + + if (typeof style.size == 'number') { + computedStyle.size = style.size; + } else if (style.size.indexOf('px') != -1) { + computedStyle.size = fontSize; + } else if (style.size.indexOf('em') != -1) { + computedStyle.size = canvasFontSize * fontSize; + } else if(style.size.indexOf('%') != -1) { + computedStyle.size = (canvasFontSize / 100) * fontSize; + } else if (style.size.indexOf('pt') != -1) { + computedStyle.size = fontSize / .75; + } else { + computedStyle.size = canvasFontSize; + } + + // Different scaling between normal text and VML text. This was found using + // trial and error to get the same size as non VML text. + computedStyle.size *= 0.981; + + return computedStyle; + } + + function buildStyle(style) { + return style.style + ' ' + style.variant + ' ' + style.weight + ' ' + + style.size + 'px ' + style.family; + } + + function processLineCap(lineCap) { + switch (lineCap) { + case 'butt': + return 'flat'; + case 'round': + return 'round'; + case 'square': + default: + return 'square'; + } + } + + /** + * This class implements CanvasRenderingContext2D interface as described by + * the WHATWG. + * @param {HTMLElement} surfaceElement The element that the 2D context should + * be associated with + */ + function CanvasRenderingContext2D_(surfaceElement) { + this.m_ = createMatrixIdentity(); + + this.mStack_ = []; + this.aStack_ = []; + this.currentPath_ = []; + + // Canvas context properties + this.strokeStyle = '#000'; + this.fillStyle = '#000'; + + this.lineWidth = 1; + this.lineJoin = 'miter'; + this.lineCap = 'butt'; + this.miterLimit = Z * 1; + this.globalAlpha = 1; + this.font = '10px sans-serif'; + this.textAlign = 'left'; + this.textBaseline = 'alphabetic'; + this.canvas = surfaceElement; + + var el = surfaceElement.ownerDocument.createElement('div'); + el.style.width = surfaceElement.clientWidth + 'px'; + el.style.height = surfaceElement.clientHeight + 'px'; + el.style.overflow = 'hidden'; + el.style.position = 'absolute'; + surfaceElement.appendChild(el); + + this.element_ = el; + this.arcScaleX_ = 1; + this.arcScaleY_ = 1; + this.lineScale_ = 1; + } + + var contextPrototype = CanvasRenderingContext2D_.prototype; + contextPrototype.clearRect = function() { + if (this.textMeasureEl_) { + this.textMeasureEl_.removeNode(true); + this.textMeasureEl_ = null; + } + this.element_.innerHTML = ''; + }; + + contextPrototype.beginPath = function() { + // TODO: Branch current matrix so that save/restore has no effect + // as per safari docs. + this.currentPath_ = []; + }; + + contextPrototype.moveTo = function(aX, aY) { + var p = this.getCoords_(aX, aY); + this.currentPath_.push({type: 'moveTo', x: p.x, y: p.y}); + this.currentX_ = p.x; + this.currentY_ = p.y; + }; + + contextPrototype.lineTo = function(aX, aY) { + var p = this.getCoords_(aX, aY); + this.currentPath_.push({type: 'lineTo', x: p.x, y: p.y}); + + this.currentX_ = p.x; + this.currentY_ = p.y; + }; + + contextPrototype.bezierCurveTo = function(aCP1x, aCP1y, + aCP2x, aCP2y, + aX, aY) { + var p = this.getCoords_(aX, aY); + var cp1 = this.getCoords_(aCP1x, aCP1y); + var cp2 = this.getCoords_(aCP2x, aCP2y); + bezierCurveTo(this, cp1, cp2, p); + }; + + // Helper function that takes the already fixed cordinates. + function bezierCurveTo(self, cp1, cp2, p) { + self.currentPath_.push({ + type: 'bezierCurveTo', + cp1x: cp1.x, + cp1y: cp1.y, + cp2x: cp2.x, + cp2y: cp2.y, + x: p.x, + y: p.y + }); + self.currentX_ = p.x; + self.currentY_ = p.y; + } + + contextPrototype.quadraticCurveTo = function(aCPx, aCPy, aX, aY) { + // the following is lifted almost directly from + // http://developer.mozilla.org/en/docs/Canvas_tutorial:Drawing_shapes + + var cp = this.getCoords_(aCPx, aCPy); + var p = this.getCoords_(aX, aY); + + var cp1 = { + x: this.currentX_ + 2.0 / 3.0 * (cp.x - this.currentX_), + y: this.currentY_ + 2.0 / 3.0 * (cp.y - this.currentY_) + }; + var cp2 = { + x: cp1.x + (p.x - this.currentX_) / 3.0, + y: cp1.y + (p.y - this.currentY_) / 3.0 + }; + + bezierCurveTo(this, cp1, cp2, p); + }; + + contextPrototype.arc = function(aX, aY, aRadius, + aStartAngle, aEndAngle, aClockwise) { + aRadius *= Z; + var arcType = aClockwise ? 'at' : 'wa'; + + var xStart = aX + mc(aStartAngle) * aRadius - Z2; + var yStart = aY + ms(aStartAngle) * aRadius - Z2; + + var xEnd = aX + mc(aEndAngle) * aRadius - Z2; + var yEnd = aY + ms(aEndAngle) * aRadius - Z2; + + // IE won't render arches drawn counter clockwise if xStart == xEnd. + if (xStart == xEnd && !aClockwise) { + xStart += 0.125; // Offset xStart by 1/80 of a pixel. Use something + // that can be represented in binary + } + + var p = this.getCoords_(aX, aY); + var pStart = this.getCoords_(xStart, yStart); + var pEnd = this.getCoords_(xEnd, yEnd); + + this.currentPath_.push({type: arcType, + x: p.x, + y: p.y, + radius: aRadius, + xStart: pStart.x, + yStart: pStart.y, + xEnd: pEnd.x, + yEnd: pEnd.y}); + + }; + + contextPrototype.rect = function(aX, aY, aWidth, aHeight) { + this.moveTo(aX, aY); + this.lineTo(aX + aWidth, aY); + this.lineTo(aX + aWidth, aY + aHeight); + this.lineTo(aX, aY + aHeight); + this.closePath(); + }; + + contextPrototype.strokeRect = function(aX, aY, aWidth, aHeight) { + var oldPath = this.currentPath_; + this.beginPath(); + + this.moveTo(aX, aY); + this.lineTo(aX + aWidth, aY); + this.lineTo(aX + aWidth, aY + aHeight); + this.lineTo(aX, aY + aHeight); + this.closePath(); + this.stroke(); + + this.currentPath_ = oldPath; + }; + + contextPrototype.fillRect = function(aX, aY, aWidth, aHeight) { + var oldPath = this.currentPath_; + this.beginPath(); + + this.moveTo(aX, aY); + this.lineTo(aX + aWidth, aY); + this.lineTo(aX + aWidth, aY + aHeight); + this.lineTo(aX, aY + aHeight); + this.closePath(); + this.fill(); + + this.currentPath_ = oldPath; + }; + + contextPrototype.createLinearGradient = function(aX0, aY0, aX1, aY1) { + var gradient = new CanvasGradient_('gradient'); + gradient.x0_ = aX0; + gradient.y0_ = aY0; + gradient.x1_ = aX1; + gradient.y1_ = aY1; + return gradient; + }; + + contextPrototype.createRadialGradient = function(aX0, aY0, aR0, + aX1, aY1, aR1) { + var gradient = new CanvasGradient_('gradientradial'); + gradient.x0_ = aX0; + gradient.y0_ = aY0; + gradient.r0_ = aR0; + gradient.x1_ = aX1; + gradient.y1_ = aY1; + gradient.r1_ = aR1; + return gradient; + }; + + contextPrototype.drawImage = function(image, var_args) { + var dx, dy, dw, dh, sx, sy, sw, sh; + + // to find the original width we overide the width and height + var oldRuntimeWidth = image.runtimeStyle.width; + var oldRuntimeHeight = image.runtimeStyle.height; + image.runtimeStyle.width = 'auto'; + image.runtimeStyle.height = 'auto'; + + // get the original size + var w = image.width; + var h = image.height; + + // and remove overides + image.runtimeStyle.width = oldRuntimeWidth; + image.runtimeStyle.height = oldRuntimeHeight; + + if (arguments.length == 3) { + dx = arguments[1]; + dy = arguments[2]; + sx = sy = 0; + sw = dw = w; + sh = dh = h; + } else if (arguments.length == 5) { + dx = arguments[1]; + dy = arguments[2]; + dw = arguments[3]; + dh = arguments[4]; + sx = sy = 0; + sw = w; + sh = h; + } else if (arguments.length == 9) { + sx = arguments[1]; + sy = arguments[2]; + sw = arguments[3]; + sh = arguments[4]; + dx = arguments[5]; + dy = arguments[6]; + dw = arguments[7]; + dh = arguments[8]; + } else { + throw Error('Invalid number of arguments'); + } + + var d = this.getCoords_(dx, dy); + + var w2 = sw / 2; + var h2 = sh / 2; + + var vmlStr = []; + + var W = 10; + var H = 10; + + // For some reason that I've now forgotten, using divs didn't work + vmlStr.push(' ' , + '', + ''); + + this.element_.insertAdjacentHTML('BeforeEnd', vmlStr.join('')); + }; + + contextPrototype.stroke = function(aFill) { + var W = 10; + var H = 10; + // Divide the shape into chunks if it's too long because IE has a limit + // somewhere for how long a VML shape can be. This simple division does + // not work with fills, only strokes, unfortunately. + var chunkSize = 5000; + + var min = {x: null, y: null}; + var max = {x: null, y: null}; + + for (var j = 0; j < this.currentPath_.length; j += chunkSize) { + var lineStr = []; + var lineOpen = false; + + lineStr.push(''); + + if (!aFill) { + appendStroke(this, lineStr); + } else { + appendFill(this, lineStr, min, max); + } + + lineStr.push(''); + + this.element_.insertAdjacentHTML('beforeEnd', lineStr.join('')); + } + }; + + function appendStroke(ctx, lineStr) { + var a = processStyle(ctx.strokeStyle); + var color = a.color; + var opacity = a.alpha * ctx.globalAlpha; + var lineWidth = ctx.lineScale_ * ctx.lineWidth; + + // VML cannot correctly render a line if the width is less than 1px. + // In that case, we dilute the color to make the line look thinner. + if (lineWidth < 1) { + opacity *= lineWidth; + } + + lineStr.push( + '' + ); + } + + function appendFill(ctx, lineStr, min, max) { + var fillStyle = ctx.fillStyle; + var arcScaleX = ctx.arcScaleX_; + var arcScaleY = ctx.arcScaleY_; + var width = max.x - min.x; + var height = max.y - min.y; + if (fillStyle instanceof CanvasGradient_) { + // TODO: Gradients transformed with the transformation matrix. + var angle = 0; + var focus = {x: 0, y: 0}; + + // additional offset + var shift = 0; + // scale factor for offset + var expansion = 1; + + if (fillStyle.type_ == 'gradient') { + var x0 = fillStyle.x0_ / arcScaleX; + var y0 = fillStyle.y0_ / arcScaleY; + var x1 = fillStyle.x1_ / arcScaleX; + var y1 = fillStyle.y1_ / arcScaleY; + var p0 = ctx.getCoords_(x0, y0); + var p1 = ctx.getCoords_(x1, y1); + var dx = p1.x - p0.x; + var dy = p1.y - p0.y; + angle = Math.atan2(dx, dy) * 180 / Math.PI; + + // The angle should be a non-negative number. + if (angle < 0) { + angle += 360; + } + + // Very small angles produce an unexpected result because they are + // converted to a scientific notation string. + if (angle < 1e-6) { + angle = 0; + } + } else { + var p0 = ctx.getCoords_(fillStyle.x0_, fillStyle.y0_); + focus = { + x: (p0.x - min.x) / width, + y: (p0.y - min.y) / height + }; + + width /= arcScaleX * Z; + height /= arcScaleY * Z; + var dimension = m.max(width, height); + shift = 2 * fillStyle.r0_ / dimension; + expansion = 2 * fillStyle.r1_ / dimension - shift; + } + + // We need to sort the color stops in ascending order by offset, + // otherwise IE won't interpret it correctly. + var stops = fillStyle.colors_; + stops.sort(function(cs1, cs2) { + return cs1.offset - cs2.offset; + }); + + var length = stops.length; + var color1 = stops[0].color; + var color2 = stops[length - 1].color; + var opacity1 = stops[0].alpha * ctx.globalAlpha; + var opacity2 = stops[length - 1].alpha * ctx.globalAlpha; + + var colors = []; + for (var i = 0; i < length; i++) { + var stop = stops[i]; + colors.push(stop.offset * expansion + shift + ' ' + stop.color); + } + + // When colors attribute is used, the meanings of opacity and o:opacity2 + // are reversed. + lineStr.push(''); + } else if (fillStyle instanceof CanvasPattern_) { + if (width && height) { + var deltaLeft = -min.x; + var deltaTop = -min.y; + lineStr.push(''); + } + } else { + var a = processStyle(ctx.fillStyle); + var color = a.color; + var opacity = a.alpha * ctx.globalAlpha; + lineStr.push(''); + } + } + + contextPrototype.fill = function() { + this.stroke(true); + }; + + contextPrototype.closePath = function() { + this.currentPath_.push({type: 'close'}); + }; + + /** + * @private + */ + contextPrototype.getCoords_ = function(aX, aY) { + var m = this.m_; + return { + x: Z * (aX * m[0][0] + aY * m[1][0] + m[2][0]) - Z2, + y: Z * (aX * m[0][1] + aY * m[1][1] + m[2][1]) - Z2 + }; + }; + + contextPrototype.save = function() { + var o = {}; + copyState(this, o); + this.aStack_.push(o); + this.mStack_.push(this.m_); + this.m_ = matrixMultiply(createMatrixIdentity(), this.m_); + }; + + contextPrototype.restore = function() { + if (this.aStack_.length) { + copyState(this.aStack_.pop(), this); + this.m_ = this.mStack_.pop(); + } + }; + + function matrixIsFinite(m) { + return isFinite(m[0][0]) && isFinite(m[0][1]) && + isFinite(m[1][0]) && isFinite(m[1][1]) && + isFinite(m[2][0]) && isFinite(m[2][1]); + } + + function setM(ctx, m, updateLineScale) { + if (!matrixIsFinite(m)) { + return; + } + ctx.m_ = m; + + if (updateLineScale) { + // Get the line scale. + // Determinant of this.m_ means how much the area is enlarged by the + // transformation. So its square root can be used as a scale factor + // for width. + var det = m[0][0] * m[1][1] - m[0][1] * m[1][0]; + ctx.lineScale_ = sqrt(abs(det)); + } + } + + contextPrototype.translate = function(aX, aY) { + var m1 = [ + [1, 0, 0], + [0, 1, 0], + [aX, aY, 1] + ]; + + setM(this, matrixMultiply(m1, this.m_), false); + }; + + contextPrototype.rotate = function(aRot) { + var c = mc(aRot); + var s = ms(aRot); + + var m1 = [ + [c, s, 0], + [-s, c, 0], + [0, 0, 1] + ]; + + setM(this, matrixMultiply(m1, this.m_), false); + }; + + contextPrototype.scale = function(aX, aY) { + this.arcScaleX_ *= aX; + this.arcScaleY_ *= aY; + var m1 = [ + [aX, 0, 0], + [0, aY, 0], + [0, 0, 1] + ]; + + setM(this, matrixMultiply(m1, this.m_), true); + }; + + contextPrototype.transform = function(m11, m12, m21, m22, dx, dy) { + var m1 = [ + [m11, m12, 0], + [m21, m22, 0], + [dx, dy, 1] + ]; + + setM(this, matrixMultiply(m1, this.m_), true); + }; + + contextPrototype.setTransform = function(m11, m12, m21, m22, dx, dy) { + var m = [ + [m11, m12, 0], + [m21, m22, 0], + [dx, dy, 1] + ]; + + setM(this, m, true); + }; + + /** + * The text drawing function. + * The maxWidth argument isn't taken in account, since no browser supports + * it yet. + */ + contextPrototype.drawText_ = function(text, x, y, maxWidth, stroke) { + var m = this.m_, + delta = 1000, + left = 0, + right = delta, + offset = {x: 0, y: 0}, + lineStr = []; + + var fontStyle = getComputedStyle(processFontStyle(this.font), + this.element_); + + var fontStyleString = buildStyle(fontStyle); + + var elementStyle = this.element_.currentStyle; + var textAlign = this.textAlign.toLowerCase(); + switch (textAlign) { + case 'left': + case 'center': + case 'right': + break; + case 'end': + textAlign = elementStyle.direction == 'ltr' ? 'right' : 'left'; + break; + case 'start': + textAlign = elementStyle.direction == 'rtl' ? 'right' : 'left'; + break; + default: + textAlign = 'left'; + } + + // 1.75 is an arbitrary number, as there is no info about the text baseline + switch (this.textBaseline) { + case 'hanging': + case 'top': + offset.y = fontStyle.size / 1.75; + break; + case 'middle': + break; + default: + case null: + case 'alphabetic': + case 'ideographic': + case 'bottom': + offset.y = -fontStyle.size / 2.25; + break; + } + + switch(textAlign) { + case 'right': + left = delta; + right = 0.05; + break; + case 'center': + left = right = delta / 2; + break; + } + + var d = this.getCoords_(x + offset.x, y + offset.y); + + lineStr.push(''); + + if (stroke) { + appendStroke(this, lineStr); + } else { + // TODO: Fix the min and max params. + appendFill(this, lineStr, {x: -left, y: 0}, + {x: right, y: fontStyle.size}); + } + + var skewM = m[0][0].toFixed(3) + ',' + m[1][0].toFixed(3) + ',' + + m[0][1].toFixed(3) + ',' + m[1][1].toFixed(3) + ',0,0'; + + var skewOffset = mr(d.x / Z) + ',' + mr(d.y / Z); + + lineStr.push('