stylessidebarpane.js

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2007 Apple Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

WebInspector.StylesSidebarPane = function()
{
    WebInspector.SidebarPane.call(this, WebInspector.UIString("Styles"));
}

WebInspector.StylesSidebarPane.prototype = {
    update: function(node, editedSection, forceUpdate)
    {
        var refresh = false;

        if (forceUpdate)
            delete this.node;

        if (!forceUpdate && (!node || node === this.node))
            refresh = true;

        if (node && node.nodeType === Node.TEXT_NODE && node.parentNode)
            node = node.parentNode;

        if (node && node.nodeType !== Node.ELEMENT_NODE)
            node = null;

        if (node)
            this.node = node;
        else
            node = this.node;

        var body = this.bodyElement;
        if (!refresh || !node) {
            body.removeChildren();
            this.sections = [];
        }

        if (!node)
            return;

        var styleRules = [];

        if (refresh) {
            for (var i = 0; i < this.sections.length; ++i) {
                var section = this.sections[i];
                if (section.computedStyle)
                    section.styleRule.style = node.ownerDocument.defaultView.getComputedStyle(node);
                var styleRule = { section: section, style: section.styleRule.style, computedStyle: section.computedStyle };
                styleRules.push(styleRule);
            }
        } else {
            var computedStyle = node.ownerDocument.defaultView.getComputedStyle(node);
            styleRules.push({ computedStyle: true, selectorText: WebInspector.UIString("Computed Style"), style: computedStyle, editable: false });

            var nodeName = node.nodeName.toLowerCase();
            for (var i = 0; i < node.attributes.length; ++i) {
                var attr = node.attributes[i];
                if (attr.style) {
                    var attrStyle = { style: attr.style, editable: false };
                    attrStyle.subtitle = WebInspector.UIString("element’s “%s” attribute", attr.name);
                    attrStyle.selectorText = nodeName + "[" + attr.name;
                    if (attr.value.length)
                        attrStyle.selectorText += "=" + attr.value;
                    attrStyle.selectorText += "]";
                    styleRules.push(attrStyle);
                }
            }

            if (node.style && (node.style.length || Object.hasProperties(node.style.__disabledProperties))) {
                var inlineStyle = { selectorText: WebInspector.UIString("Inline Style Attribute"), style: node.style };
                inlineStyle.subtitle = WebInspector.UIString("element’s “%s” attribute", "style");
                styleRules.push(inlineStyle);
            }

            var matchedStyleRules = node.ownerDocument.defaultView.getMatchedCSSRules(node, "", !Preferences.showUserAgentStyles);
            if (matchedStyleRules) {
                // Add rules in reverse order to match the cascade order.
                for (var i = (matchedStyleRules.length - 1); i >= 0; --i) {
                    var rule = matchedStyleRules[i];
                    styleRules.push({ style: rule.style, selectorText: rule.selectorText, parentStyleSheet: rule.parentStyleSheet });
                }
            }
        }

        function deleteDisabledProperty(style, name)
        {
            if (!style || !name)
                return;
            if (style.__disabledPropertyValues)
                delete style.__disabledPropertyValues[name];
            if (style.__disabledPropertyPriorities)
                delete style.__disabledPropertyPriorities[name];
            if (style.__disabledProperties)
                delete style.__disabledProperties[name];
        }

        var usedProperties = {};
        var disabledComputedProperties = {};
        var priorityUsed = false;

        // Walk the style rules and make a list of all used and overloaded properties.
        for (var i = 0; i < styleRules.length; ++i) {
            var styleRule = styleRules[i];
            if (styleRule.computedStyle)
                continue;

            styleRule.usedProperties = {};

            var style = styleRule.style;
            for (var j = 0; j < style.length; ++j) {
                var name = style[j];

                if (!priorityUsed && style.getPropertyPriority(name).length)
                    priorityUsed = true;

                // If the property name is already used by another rule then this rule's
                // property is overloaded, so don't add it to the rule's usedProperties.
                if (!(name in usedProperties))
                    styleRule.usedProperties[name] = true;

                if (name === "font") {
                    // The font property is not reported as a shorthand. Report finding the individual
                    // properties so they are visible in computed style.
                    // FIXME: remove this when http://bugs.webkit.org/show_bug.cgi?id=15598 is fixed.
                    styleRule.usedProperties["font-family"] = true;
                    styleRule.usedProperties["font-size"] = true;
                    styleRule.usedProperties["font-style"] = true;
                    styleRule.usedProperties["font-variant"] = true;
                    styleRule.usedProperties["font-weight"] = true;
                    styleRule.usedProperties["line-height"] = true;
                }

                // Delete any disabled properties, since the property does exist.
                // This prevents it from showing twice.
                deleteDisabledProperty(style, name);
                deleteDisabledProperty(style, style.getPropertyShorthand(name));
            }

            // Add all the properties found in this style to the used properties list.
            // Do this here so only future rules are affect by properties used in this rule.
            for (var name in styleRules[i].usedProperties)
                usedProperties[name] = true;

            // Remember all disabled properties so they show up in computed style.
            if (style.__disabledProperties)
                for (var name in style.__disabledProperties)
                    disabledComputedProperties[name] = true;
        }

        if (priorityUsed) {
            // Walk the properties again and account for !important.
            var foundPriorityProperties = [];

            // Walk in reverse to match the order !important overrides.
            for (var i = (styleRules.length - 1); i >= 0; --i) {
                if (styleRules[i].computedStyle)
                    continue;

                var style = styleRules[i].style;
                var uniqueProperties = getUniqueStyleProperties(style);
                for (var j = 0; j < uniqueProperties.length; ++j) {
                    var name = uniqueProperties[j];
                    if (style.getPropertyPriority(name).length) {
                        if (!(name in foundPriorityProperties))
                            styleRules[i].usedProperties[name] = true;
                        else
                            delete styleRules[i].usedProperties[name];
                        foundPriorityProperties[name] = true;
                    } else if (name in foundPriorityProperties)
                        delete styleRules[i].usedProperties[name];
                }
            }
        }

        if (refresh) {
            // Walk the style rules and update the sections with new overloaded and used properties.
            for (var i = 0; i < styleRules.length; ++i) {
                var styleRule = styleRules[i];
                var section = styleRule.section;
                if (styleRule.computedStyle)
                    section.disabledComputedProperties = disabledComputedProperties;
                section._usedProperties = (styleRule.usedProperties || usedProperties);
                section.update((section === editedSection) || styleRule.computedStyle);
            }
        } else {
            // Make a property section for each style rule.
            for (var i = 0; i < styleRules.length; ++i) {
                var styleRule = styleRules[i];
                var subtitle = styleRule.subtitle;
                delete styleRule.subtitle;

                var computedStyle = styleRule.computedStyle;
                delete styleRule.computedStyle;

                var ruleUsedProperties = styleRule.usedProperties;
                delete styleRule.usedProperties;

                var editable = styleRule.editable;
                delete styleRule.editable;

                // Default editable to true if it was omitted.
                if (typeof editable === "undefined")
                    editable = true;

                var section = new WebInspector.StylePropertiesSection(styleRule, subtitle, computedStyle, (ruleUsedProperties || usedProperties), editable);
                if (computedStyle)
                    section.disabledComputedProperties = disabledComputedProperties;
                section.pane = this;

                if (Preferences.styleRulesExpandedState && section.identifier in Preferences.styleRulesExpandedState)
                    section.expanded = Preferences.styleRulesExpandedState[section.identifier];
                else if (computedStyle)
                    section.collapse(true);
                else
                    section.expand(true);

                body.appendChild(section.element);
                this.sections.push(section);
            }
        }
    }
}

WebInspector.StylesSidebarPane.prototype.__proto__ = WebInspector.SidebarPane.prototype;

WebInspector.StylePropertiesSection = function(styleRule, subtitle, computedStyle, usedProperties, editable)
{
    WebInspector.PropertiesSection.call(this, styleRule.selectorText);

    this.styleRule = styleRule;
    this.computedStyle = computedStyle;
    this.editable = (editable && !computedStyle);

    // Prevent editing the user agent and user rules.
    var isUserAgent = this.styleRule.parentStyleSheet && !this.styleRule.parentStyleSheet.ownerNode && !this.styleRule.parentStyleSheet.href;
    var isUser = this.styleRule.parentStyleSheet && this.styleRule.parentStyleSheet.ownerNode && this.styleRule.parentStyleSheet.ownerNode.nodeName == '#document';
    if (isUserAgent || isUser)
        this.editable = false;

    this._usedProperties = usedProperties;

    if (computedStyle) {
        this.element.addStyleClass("computed-style");

        if (Preferences.showInheritedComputedStyleProperties)
            this.element.addStyleClass("show-inherited");

        var showInheritedLabel = document.createElement("label");
        var showInheritedInput = document.createElement("input");
        showInheritedInput.type = "checkbox";
        showInheritedInput.checked = Preferences.showInheritedComputedStyleProperties;

        var computedStyleSection = this;
        var showInheritedToggleFunction = function(event) {
            Preferences.showInheritedComputedStyleProperties = showInheritedInput.checked;
            if (Preferences.showInheritedComputedStyleProperties)
                computedStyleSection.element.addStyleClass("show-inherited");
            else
                computedStyleSection.element.removeStyleClass("show-inherited");
            event.stopPropagation();
        };

        showInheritedLabel.addEventListener("click", showInheritedToggleFunction, false);

        showInheritedLabel.appendChild(showInheritedInput);
        showInheritedLabel.appendChild(document.createTextNode(WebInspector.UIString("Show inherited")));
        this.subtitleElement.appendChild(showInheritedLabel);
    } else {
        if (!subtitle) {
            if (this.styleRule.parentStyleSheet && this.styleRule.parentStyleSheet.href) {
                var url = this.styleRule.parentStyleSheet.href;
                subtitle = WebInspector.linkifyURL(url, WebInspector.displayNameForURL(url));
                this.subtitleElement.addStyleClass("file");
            } else if (isUserAgent)
                subtitle = WebInspector.UIString("user agent stylesheet");
            else if (isUser)
                subtitle = WebInspector.UIString("user stylesheet");
            else
                subtitle = WebInspector.UIString("inline stylesheet");
        }

        this.subtitle = subtitle;
    }

    this.identifier = styleRule.selectorText;
    if (this.subtitle)