/*
 * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
 * Copyright (C) 2009 Joseph Pecoraro
 *
 * 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.
 */

/**
 * @extends {WebInspector.View}
 * @implements {WebInspector.Searchable}
 * @constructor
 * @param {boolean} hideContextSelector
 */
WebInspector.ConsoleView = function(hideContextSelector)
{
    WebInspector.View.call(this);

    this.element.id = "console-view";
    this._visibleMessagesIndices = [];
    this._urlToMessageCount = {};

    this._clearConsoleButton = new WebInspector.StatusBarButton(WebInspector.UIString("Clear console log."), "clear-status-bar-item");
    this._clearConsoleButton.addEventListener("click", this._requestClearMessages, this);

    this._frameSelector = new WebInspector.StatusBarComboBox(this._frameChanged.bind(this), "console-context");
    this._contextSelector = new WebInspector.StatusBarComboBox(this._contextChanged.bind(this), "console-context");

    this._filter = new WebInspector.ConsoleViewFilter();
    this._filter.addEventListener(WebInspector.ConsoleViewFilter.Events.FilterChanged, this._updateMessageList.bind(this));

    if (hideContextSelector) {
        this._frameSelector.element.addStyleClass("hidden");
        this._contextSelector.element.addStyleClass("hidden");
    }

    this.messagesElement = document.createElement("div");
    this.messagesElement.id = "console-messages";
    this.messagesElement.className = "monospace";
    this.messagesElement.addEventListener("click", this._messagesClicked.bind(this), true);
    this.element.appendChild(this.messagesElement);
    this._scrolledToBottom = true;

    this.promptElement = document.createElement("div");
    this.promptElement.id = "console-prompt";
    this.promptElement.className = "source-code";
    this.promptElement.spellcheck = false;
    this.messagesElement.appendChild(this.promptElement);
    this.messagesElement.appendChild(document.createElement("br"));

    this.topGroup = new WebInspector.ConsoleGroup(null);
    this.messagesElement.insertBefore(this.topGroup.element, this.promptElement);
    this.currentGroup = this.topGroup;

    this._registerShortcuts();
    this.registerRequiredCSS("textPrompt.css");

    this.messagesElement.addEventListener("contextmenu", this._handleContextMenuEvent.bind(this), false);

    WebInspector.settings.monitoringXHREnabled.addChangeListener(this._monitoringXHREnabledSettingChanged.bind(this));

    WebInspector.console.addEventListener(WebInspector.ConsoleModel.Events.MessageAdded, this._consoleMessageAdded, this);
    WebInspector.console.addEventListener(WebInspector.ConsoleModel.Events.ConsoleCleared, this._consoleCleared, this);

    this._linkifier = new WebInspector.Linkifier();

    this.prompt = new WebInspector.TextPromptWithHistory(WebInspector.runtimeModel.completionsForTextPrompt.bind(WebInspector.runtimeModel));
    this.prompt.setSuggestBoxEnabled("generic-suggest");
    this.prompt.renderAsBlock();
    this.prompt.attach(this.promptElement);
    this.prompt.proxyElement.addEventListener("keydown", this._promptKeyDown.bind(this), false);
    this.prompt.setHistoryData(WebInspector.settings.consoleHistory.get());

    WebInspector.runtimeModel.contextLists().forEach(this._addFrame, this);
    WebInspector.runtimeModel.addEventListener(WebInspector.RuntimeModel.Events.FrameExecutionContextListAdded, this._frameAdded, this);
    WebInspector.runtimeModel.addEventListener(WebInspector.RuntimeModel.Events.FrameExecutionContextListRemoved, this._frameRemoved, this);

    this._filterStatusMessageElement = document.createElement("div");
    this._filterStatusMessageElement.classList.add("console-message");
    this._filterStatusTextElement = this._filterStatusMessageElement.createChild("span", "console-info");
    this._filterStatusMessageElement.createTextChild(" ");
    var resetFiltersLink = this._filterStatusMessageElement.createChild("span", "console-info node-link");
    resetFiltersLink.textContent = WebInspector.UIString("Show all messages.");
    resetFiltersLink.addEventListener("click", this._filter.reset.bind(this._filter), true);

    this.messagesElement.insertBefore(this._filterStatusMessageElement, this.topGroup.element);

    this._updateFilterStatus();
}

WebInspector.ConsoleView.prototype = {
    get statusBarItems()
    {
        return [this._clearConsoleButton.element, this._frameSelector.element, this._contextSelector.element, this._filter.sourceFilterButton.element, this._filter.filterBarElement];
    },

    /**
     * @param {WebInspector.Event} event
     */
    _frameAdded: function(event)
    {
        var contextList = /** @type {WebInspector.FrameExecutionContextList} */ (event.data);
        this._addFrame(contextList);
    },

    /**
     * @param {WebInspector.FrameExecutionContextList} contextList
     */
    _addFrame: function(contextList)
    {
        var option = this._frameSelector.createOption(contextList.displayName, contextList.url);
        option._contextList = contextList;
        contextList._consoleOption = option;
        contextList.addEventListener(WebInspector.FrameExecutionContextList.EventTypes.ContextsUpdated, this._frameUpdated, this);
        contextList.addEventListener(WebInspector.FrameExecutionContextList.EventTypes.ContextAdded, this._contextAdded, this);
        this._frameChanged();
    },

    /**
     * @param {WebInspector.Event} event
     */
    _frameRemoved: function(event)
    {
        var contextList = /** @type {WebInspector.FrameExecutionContextList} */ (event.data);
        this._frameSelector.removeOption(contextList._consoleOption);
        this._frameChanged();
    },

    _frameChanged: function()
    {
        var context = this._currentFrame();
        if (!context) {
            WebInspector.runtimeModel.setCurrentExecutionContext(null);
            this._contextSelector.element.addStyleClass("hidden");
            return;
        }

        var executionContexts = context.executionContexts();
        if (executionContexts.length)
            WebInspector.runtimeModel.setCurrentExecutionContext(executionContexts[0]);

        if (executionContexts.length === 1) {
            this._contextSelector.element.addStyleClass("hidden");
            return;
        }
        this._contextSelector.element.removeStyleClass("hidden");
        this._contextSelector.removeOptions();
        for (var i = 0; i < executionContexts.length; ++i)
            this._appendContextOption(executionContexts[i]);
    },

    /**
     * @param {WebInspector.ExecutionContext} executionContext
     */
    _appendContextOption: function(executionContext)
    {
        if (!WebInspector.runtimeModel.currentExecutionContext())
            WebInspector.runtimeModel.setCurrentExecutionContext(executionContext);
        var option = this._contextSelector.createOption(executionContext.name, executionContext.id);
        option._executionContext = executionContext;
    },

    /**
     * @param {Event} event
     */
    _contextChanged: function(event)
    {
        var option = this._contextSelector.selectedOption();
        WebInspector.runtimeModel.setCurrentExecutionContext(option ? option._executionContext : null);
    },

    /**
     * @param {WebInspector.Event} event
     */
    _frameUpdated: function(event)
    {
        var contextList = /** @type {WebInspector.FrameExecutionContextList} */ (event.data);
        var option = contextList._consoleOption;
        option.text = contextList.displayName;
        option.title = contextList.url;
    },

    /**
     * @param {WebInspector.Event} event
     */
    _contextAdded: function(event)
    {
        var contextList = /** @type {WebInspector.FrameExecutionContextList} */ (event.data);
        if (contextList === this._currentFrame())
            this._frameChanged();
    },

    /**
     * @return {WebInspector.FrameExecutionContextList|undefined}
     */
    _currentFrame: function()
    {
        var option = this._frameSelector.selectedOption();
        return option ? option._contextList : undefined;
    },

    willHide: function()
    {
        this.prompt.hideSuggestBox();
        this.prompt.clearAutoComplete(true);
    },

    wasShown: function()
    {
        if (!this.prompt.isCaretInsidePrompt())
            this.prompt.moveCaretToEndOfPrompt();
    },

    afterShow: function()
    {
        WebInspector.setCurrentFocusElement(this.promptElement);
    },

    storeScrollPositions: function()
    {
        WebInspector.View.prototype.storeScrollPositions.call(this);
        this._scrolledToBottom = this.messagesElement.isScrolledToBottom();
    },

    restoreScrollPositions: function()
    {
        if (this._scrolledToBottom)
            this._immediatelyScrollIntoView();
        else
            WebInspector.View.prototype.restoreScrollPositions.call(this);
    },

    onResize: function()
    {
        this.restoreScrollPositions();
    },

    _isScrollIntoViewScheduled: function()
    {
        return !!this._scrollIntoViewTimer;
    },

    _scheduleScrollIntoView: function()
    {
        if (this._scrollIntoViewTimer)
            return;

        function scrollIntoView()
        {
            delete this._scrollIntoViewTimer;
            this.promptElement.scrollIntoView(true);
        }
        this._scrollIntoViewTimer = setTimeout(scrollIntoView.bind(this), 20);
    },

    _immediatelyScrollIntoView: function()
    {
        this.promptElement.scrollIntoView(true);
        this._cancelScheduledScrollIntoView();
    },

    _cancelScheduledScrollIntoView: function()
    {
        if (!this._isScrollIntoViewScheduled())
            return;

        clearTimeout(this._scrollIntoViewTimer);
        delete this._scrollIntoViewTimer;
    },

    /**
     * @param {number=} count
     */
    _updateFilterStatus: function(count) {
        count = (typeof count === undefined) ? (WebInspector.console.messages.length - this._visibleMessagesIndices.length) : count;
        this._filterStatusTextElement.textContent = WebInspector.UIString(count == 1 ? "%d message is hidden by filters." : "%d messages are hidden by filters.", count);
        this._filterStatusMessageElement.style.display = count ? "" : "none";
    },

    /**
     * @param {WebInspector.Event} event
     */
    _consoleMessageAdded: function(event)
    {
        var message = /** @type {WebInspector.ConsoleMessage} */ (event.data);
        var index = message.index;

        if (this._urlToMessageCount[message.url])
            this._urlToMessageCount[message.url]++;
        else
            this._urlToMessageCount[message.url] = 1;

        if (this._filter.shouldBeVisible(message))
            this._showConsoleMessage(index);
        else
            this._updateFilterStatus();
    },

    _showConsoleMessage: function(index)
    {
        var message = WebInspector.console.messages[index];

        // this.messagesElement.isScrolledToBottom() is forcing style recalculation.
        // We just skip it if the scroll action has been scheduled.
        if (!this._isScrollIntoViewScheduled() && ((message instanceof WebInspector.ConsoleCommandResult) || this.messagesElement.isScrolledToBottom()))
            this._scheduleScrollIntoView();

        this._visibleMessagesIndices.push(index);

        if (message.type === WebInspector.ConsoleMessage.MessageType.EndGroup) {
            var parentGroup = this.currentGroup.parentGroup;
            if (parentGroup)
                this.currentGroup = parentGroup;
        } else {
            if (message.type === WebInspector.ConsoleMessage.MessageType.StartGroup || message.type === WebInspector.ConsoleMessage.MessageType.StartGroupCollapsed) {
                var group = new WebInspector.ConsoleGroup(this.currentGroup);
                this.currentGroup.messagesElement.appendChild(group.element);
                this.currentGroup = group;
                message.group = group;
            }
            this.currentGroup.addMessage(message);
        }

        if (this._searchRegex && message.matchesRegex(this._searchRegex)) {
            this._searchResultsIndices.push(index);
            WebInspector.searchController.updateSearchMatchesCount(this._searchResultsIndices.length, this._searchProvider);
        }
    },

    _consoleCleared: function()
    {
        this._scrolledToBottom = true;
        for (var i = 0; i < this._visibleMessagesIndices.length; ++i)
            WebInspector.console.messages[this._visibleMessagesIndices[i]].willHide();
        this._visibleMessagesIndices = [];
        this._searchResultsIndices = [];

        if (this._searchRegex)
            WebInspector.searchController.updateSearchMatchesCount(0, this._searchProvider);

        this.currentGroup = this.topGroup;
        this.topGroup.messagesElement.removeChildren();

        this._clearCurrentSearchResultHighlight();
        this._updateFilterStatus(0);

        this._linkifier.reset();
    },

    _handleContextMenuEvent: function(event)
    {
        if (!window.getSelection().isCollapsed) {
            // If there is a selection, we want to show our normal context menu
            // (with Copy, etc.), and not Clear Console.
            return;
        }

        if (event.target.enclosingNodeOrSelfWithNodeName("a"))
            return;

        var contextMenu = new WebInspector.ContextMenu(event);

        function monitoringXHRItemAction()
        {
            WebInspector.settings.monitoringXHREnabled.set(!WebInspector.settings.monitoringXHREnabled.get());
        }
        contextMenu.appendCheckboxItem(WebInspector.UIString("Log XMLHttpRequests"), monitoringXHRItemAction.bind(this), WebInspector.settings.monitoringXHREnabled.get());

        function preserveLogItemAction()
        {
            WebInspector.settings.preserveConsoleLog.set(!WebInspector.settings.preserveConsoleLog.get());
        }
        contextMenu.appendCheckboxItem(WebInspector.UIString(WebInspector.useLowerCaseMenuTitles() ? "Preserve log upon navigation" : "Preserve Log upon Navigation"), preserveLogItemAction.bind(this), WebInspector.settings.preserveConsoleLog.get());

        var sourceElement = event.target.enclosingNodeOrSelfWithClass("console-message");

        var filterSubMenu = contextMenu.appendSubMenuItem(WebInspector.UIString("Filter"));

        if (sourceElement && sourceElement.message.url) {
            var menuTitle = WebInspector.UIString(WebInspector.useLowerCaseMenuTitles() ? "Hide messages from %s" : "Hide Messages from %s", new WebInspector.ParsedURL(sourceElement.message.url).displayName);
            filterSubMenu.appendItem(menuTitle, this._filter.addMessageURLFilter.bind(this._filter, sourceElement.message.url));
        }

        filterSubMenu.appendSeparator();
        var unhideAll = filterSubMenu.appendItem(WebInspector.UIString(WebInspector.useLowerCaseMenuTitles() ? "Unhide all" : "Unhide All"), this._filter.removeMessageURLFilter.bind(this._filter));
        filterSubMenu.appendSeparator();

        var hasFilters = false;

        for (var url in this._filter.messageURLFilters) {
            filterSubMenu.appendCheckboxItem(String.sprintf("%s (%d)", new WebInspector.ParsedURL(url).displayName, this._urlToMessageCount[url]), this._filter.removeMessageURLFilter.bind(this._filter, url), true);
            hasFilters = true;
        }

        filterSubMenu.setEnabled(hasFilters || (sourceElement && sourceElement.message.url));
        unhideAll.setEnabled(hasFilters);

        contextMenu.appendSeparator();
        contextMenu.appendItem(WebInspector.UIString(WebInspector.useLowerCaseMenuTitles() ? "Clear console" : "Clear Console"), this._requestClearMessages.bind(this));

        var request = (sourceElement && sourceElement.message) ? sourceElement.message.request() : null;
        if (request && request.type === WebInspector.resourceTypes.XHR) {
            contextMenu.appendSeparator();
            contextMenu.appendItem(WebInspector.UIString("Replay XHR"), NetworkAgent.replayXHR.bind(null, request.requestId));
        }

        contextMenu.show();
    },

    _updateMessageList: function()
    {
        var group = this.topGroup;
        var sourceMessages = WebInspector.console.messages;
        var visibleMessageIndex = 0;
        var newVisibleMessages = [];

        if (this._searchRegex)
            this._searchResultsIndices = [];

        var anchor = null;
        for (var i = 0; i < sourceMessages.length; ++i) {
            var sourceMessage = sourceMessages[i];
            var visibleMessage = WebInspector.console.messages[this._visibleMessagesIndices[visibleMessageIndex]];

            if (visibleMessage === sourceMessage) {
                if (this._filter.shouldBeVisible(visibleMessage)) {
                    newVisibleMessages.push(this._visibleMessagesIndices[visibleMessageIndex]);

                    if (this._searchRegex && sourceMessage.matchesRegex(this._searchRegex))
                        this._searchResultsIndices.push(i);

                    if (sourceMessage.type === WebInspector.ConsoleMessage.MessageType.EndGroup) {
                        anchor = group.element;
                        group = group.parentGroup || group;
                    } else if (sourceMessage.type === WebInspector.ConsoleMessage.MessageType.StartGroup || sourceMessage.type === WebInspector.ConsoleMessage.MessageType.StartGroupCollapsed) {
                        group = sourceMessage.group;
                        anchor = group.messagesElement.firstChild;
                    } else
                        anchor = visibleMessage.toMessageElement();
                } else {
                    visibleMessage.willHide();
                    visibleMessage.toMessageElement().remove();
                }
                ++visibleMessageIndex;
            } else {
                if (this._filter.shouldBeVisible(sourceMessage)) {

                    if (this._searchRegex && sourceMessage.matchesRegex(this._searchRegex))
                        this._searchResultsIndices.push(i);

                    group.addMessage(sourceMessage, anchor ? anchor.nextSibling : group.messagesElement.firstChild);
                    newVisibleMessages.push(i);
                    anchor = sourceMessage.toMessageElement();
                }
            }
        }

        if (this._searchRegex)
            WebInspector.searchController.updateSearchMatchesCount(this._searchResultsIndices.length, this._searchProvider);

        this._visibleMessagesIndices = newVisibleMessages;
        this._updateFilterStatus();
    },

    _monitoringXHREnabledSettingChanged: function(event)
    {
        ConsoleAgent.setMonitoringXHREnabled(event.data);
    },

    _messagesClicked: function()
    {
        if (!this.prompt.isCaretInsidePrompt() && window.getSelection().isCollapsed)
            this.prompt.moveCaretToEndOfPrompt();
    },

    _registerShortcuts: function()
    {
        this._shortcuts = {};

        var shortcut = WebInspector.KeyboardShortcut;
        var section = WebInspector.shortcutsScreen.section(WebInspector.UIString("Console"));

        var shortcutL = shortcut.makeDescriptor("l", WebInspector.KeyboardShortcut.Modifiers.Ctrl);
        this._shortcuts[shortcutL.key] = this._requestClearMessages.bind(this);
        var keys = [shortcutL];
        if (WebInspector.isMac()) {
            var shortcutK = shortcut.makeDescriptor("k", WebInspector.KeyboardShortcut.Modifiers.Meta);
            this._shortcuts[shortcutK.key] = this._requestClearMessages.bind(this);
            keys.unshift(shortcutK);
        }
        section.addAlternateKeys(keys, WebInspector.UIString("Clear console"));

        section.addKey(shortcut.makeDescriptor(shortcut.Keys.Tab), WebInspector.UIString("Autocomplete common prefix"));
        section.addKey(shortcut.makeDescriptor(shortcut.Keys.Right), WebInspector.UIString("Accept suggestion"));

        keys = [
            shortcut.makeDescriptor(shortcut.Keys.Down),
            shortcut.makeDescriptor(shortcut.Keys.Up)
        ];
        section.addRelatedKeys(keys, WebInspector.UIString("Next/previous line"));

        if (WebInspector.isMac()) {
            keys = [
                shortcut.makeDescriptor("N", shortcut.Modifiers.Alt),
                shortcut.makeDescriptor("P", shortcut.Modifiers.Alt)
            ];
            section.addRelatedKeys(keys, WebInspector.UIString("Next/previous command"));
        }

        section.addKey(shortcut.makeDescriptor(shortcut.Keys.Enter), WebInspector.UIString("Execute command"));
    },

    _requestClearMessages: function()
    {
        WebInspector.console.requestClearMessages();
    },

    _promptKeyDown: function(event)
    {
        if (isEnterKey(event)) {
            this._enterKeyPressed(event);
            return;
        }

        var shortcut = WebInspector.KeyboardShortcut.makeKeyFromEvent(event);
        var handler = this._shortcuts[shortcut];
        if (handler) {
            handler();
            event.preventDefault();
        }
    },

    /**
     * @param {string} expression
     * @param {boolean} showResultOnly
     */
    evaluateUsingTextPrompt: function(expression, showResultOnly)
    {
        this._appendCommand(expression, this.prompt.text, false, showResultOnly);
    },

    _enterKeyPressed: function(event)
    {
        if (event.altKey || event.ctrlKey || event.shiftKey)
            return;

        event.consume(true);

        this.prompt.clearAutoComplete(true);

        var str = this.prompt.text;
        if (!str.length)
            return;
        this._appendCommand(str, "", true, false);
    },

    /**
     * @param {WebInspector.RemoteObject} result
     * @param {boolean} wasThrown
     * @param {WebInspector.ConsoleCommand} originatingCommand
     */
    _printResult: function(result, wasThrown, originatingCommand)
    {
        if (!result)
            return;

        /**
         * @param {string=} url
         * @param {number=} lineNumber
         * @param {number=} columnNumber
         */
        function addMessage(url, lineNumber, columnNumber)
        {
            var message = new WebInspector.ConsoleCommandResult(result, wasThrown, originatingCommand, this._linkifier, url, lineNumber, columnNumber);
            WebInspector.console.addMessage(message);
        }

        if (result.type !== "function") {
            addMessage.call(this);
            return;
        }

        DebuggerAgent.getFunctionDetails(result.objectId, didGetDetails.bind(this));

        /**
         * @param {?Protocol.Error} error
         * @param {DebuggerAgent.FunctionDetails} response
         */
        function didGetDetails(error, response)
        {
            if (error) {
                console.error(error);
                addMessage.call(this);
                return;
            }

            var url;
            var lineNumber;
            var columnNumber;
            var script = WebInspector.debuggerModel.scriptForId(response.location.scriptId);
            if (script && script.sourceURL) {
                url = script.sourceURL;
                lineNumber = response.location.lineNumber + 1;
                columnNumber = response.location.columnNumber + 1;
            }
            addMessage.call(this, url, lineNumber, columnNumber);
        }
    },

    /**
     * @param {string} text
     * @param {string} newPromptText
     * @param {boolean} useCommandLineAPI
     * @param {boolean} showResultOnly
     */
    _appendCommand: function(text, newPromptText, useCommandLineAPI, showResultOnly)
    {
        if (!showResultOnly) {
            var commandMessage = new WebInspector.ConsoleCommand(text);
            WebInspector.console.addMessage(commandMessage);
        }
        this.prompt.text = newPromptText;

        /**
         * @param {WebInspector.RemoteObject} result
         * @param {boolean} wasThrown
         * @param {RuntimeAgent.RemoteObject=} valueResult
         */
        function printResult(result, wasThrown, valueResult)
        {
            if (!result)
                return;

            if (!showResultOnly) {
                this.prompt.pushHistoryItem(text);
                WebInspector.settings.consoleHistory.set(this.prompt.historyData.slice(-30));
            }

            this._printResult(result, wasThrown, commandMessage);
        }
        WebInspector.runtimeModel.evaluate(text, "console", useCommandLineAPI, false, false, true, printResult.bind(this));

        WebInspector.userMetrics.ConsoleEvaluated.record();
    },

    elementsToRestoreScrollPositionsFor: function()
    {
        return [this.messagesElement];
    },

    searchCanceled: function()
    {
        this._clearCurrentSearchResultHighlight();
        delete this._searchProvider;
        delete this._searchResultsIndices;
        delete this._searchRegex;
    },

    canSearchAndReplace: function()
    {
        return false;
    },

    canFilter: function()
    {
        return true;
    },

    /**
     * @param {string} query
     * @param {boolean} shouldJump
     * @param {WebInspector.Searchable=} self
     */
    performSearch: function(query, shouldJump, self)
    {
        this.searchCanceled();
        this._searchProvider = self || this;
        WebInspector.searchController.updateSearchMatchesCount(0, this._searchProvider);
        this._searchRegex = createPlainTextSearchRegex(query, "gi");

        this._searchResultsIndices = [];
        for (var i = 0; i < this._visibleMessagesIndices.length; i++) {
            if (WebInspector.console.messages[this._visibleMessagesIndices[i]].matchesRegex(this._searchRegex))
                this._searchResultsIndices.push(this._visibleMessagesIndices[i]);
        }
        WebInspector.searchController.updateSearchMatchesCount(this._searchResultsIndices.length, this._searchProvider);
        this._currentSearchResultIndex = -1;
        if (shouldJump && this._searchResultsIndices.length)
            this._jumpToSearchResult(0, self);
    },

    /**
     * @return {number}
     */
    minimalSearchQuerySize: function()
    {
        return 0;
    },

    /**
     * @param {string} query
     */
    performFilter: function(query)
    {
        this._filter.performFilter(query);
    },

    /**
     * @param {WebInspector.Searchable=} self
     */
    jumpToNextSearchResult: function(self)
    {
        if (!this._searchResultsIndices || !this._searchResultsIndices.length)
            return;
        this._jumpToSearchResult((this._currentSearchResultIndex + 1) % this._searchResultsIndices.length, self);
    },

    /**
     * @param {WebInspector.Searchable=} self
     */
    jumpToPreviousSearchResult: function(self)
    {
        if (!this._searchResultsIndices || !this._searchResultsIndices.length)
            return;
        var index = this._currentSearchResultIndex - 1;
        if (index === -1)
            index = this._searchResultsIndices.length - 1;
        this._jumpToSearchResult(index, self);
    },

    _clearCurrentSearchResultHighlight: function()
    {
        if (!this._searchResultsIndices)
            return;
        var highlightedMessage = WebInspector.console.messages[this._searchResultsIndices[this._currentSearchResultIndex]];
        if (highlightedMessage)
            highlightedMessage.clearHighlight();
        this._currentSearchResultIndex = -1;
    },

    _jumpToSearchResult: function(index, self)
    {
        this._clearCurrentSearchResultHighlight();
        this._currentSearchResultIndex = index;
        WebInspector.searchController.updateCurrentMatchIndex(this._currentSearchResultIndex, this._searchProvider);
        WebInspector.console.messages[this._searchResultsIndices[index]].highlightSearchResults(this._searchRegex);
    },

    __proto__: WebInspector.View.prototype
}

/**
 * @extends {WebInspector.Object}
 * @constructor
 */
WebInspector.ConsoleViewFilter = function()
{
    this._messageURLFilters = WebInspector.settings.messageURLFilters.get();
    this._messageSourceFilters = WebInspector.settings.messageSourceFilters.get();
    this._messageLevelFilters = WebInspector.settings.messageLevelFilters.get();

    this._sourceToKeyMap = {};

    for (var key in WebInspector.ConsoleViewFilter._messageSourceGroups) {
        if (!WebInspector.ConsoleViewFilter._messageSourceGroups[key].sources) {
            console.assert(!this._otherKey);
            this._otherKey = key;
            continue;
        }

        for (var i = 0; i < WebInspector.ConsoleViewFilter._messageSourceGroups[key].sources.length; ++i)
            this._sourceToKeyMap[WebInspector.ConsoleViewFilter._messageSourceGroups[key].sources[i]] = key;
    }

    this._filterChanged = this.dispatchEventToListeners.bind(this, WebInspector.ConsoleViewFilter.Events.FilterChanged);

    WebInspector.settings.messageSourceFilters.addChangeListener(this._updateSourceFilterButton.bind(this));
    WebInspector.settings.messageLevelFilters.addChangeListener(this._updateLevelFilterBar.bind(this));

    this.sourceFilterButton = new WebInspector.StatusBarButton(WebInspector.UIString("Filter"), "console-filter", 2);
    this.sourceFilterButton.element.addEventListener("mousedown", this._handleSourceFilterButtonClick.bind(this), false);

    this._filterBarElements = [];

    this.filterBarElement = document.createElement("div");
    this.filterBarElement.className = "scope-bar status-bar-item";

    this._createLevelFilterBarElement("all", WebInspector.UIString("All"));

    var dividerElement = document.createElement("div");
    dividerElement.addStyleClass("scope-bar-divider");
    this.filterBarElement.appendChild(dividerElement);

    this._createLevelFilterBarElement("error", WebInspector.UIString("Errors"));
    this._createLevelFilterBarElement("warning", WebInspector.UIString("Warnings"));
    this._createLevelFilterBarElement("log", WebInspector.UIString("Logs"));
    this._createLevelFilterBarElement("debug", WebInspector.UIString("Debug"));

    this._updateLevelFilterBar();
    this._updateSourceFilterButton();
};

WebInspector.ConsoleViewFilter.Events = {
    FilterChanged: "FilterChanged"
};

WebInspector.ConsoleViewFilter._messageSourceGroups = {
    JS: { sources: [WebInspector.ConsoleMessage.MessageSource.JS], title: "JavaScript", styleClass: "filter-type-javascript"},
    Network: { sources: [WebInspector.ConsoleMessage.MessageSource.Network], title: "Network", styleClass: "filter-type-network"},
    Logging: { sources: [WebInspector.ConsoleMessage.MessageSource.ConsoleAPI], title: "Logging", styleClass: "filter-type-logging"},
    CSS: { sources: [WebInspector.ConsoleMessage.MessageSource.CSS], title: "CSS", styleClass: "filter-type-css"},
    Other: { title: "Other", styleClass: "filter-type-other"}
};

WebInspector.ConsoleViewFilter.prototype = {
    /**
     * @param {string} url
     */
    addMessageURLFilter: function(url)
    {
        this._messageURLFilters[url] = true;
        WebInspector.settings.messageURLFilters.set(this._messageURLFilters);
        this._filterChanged();
    },

    /**
     * @param {string} url
     */
    removeMessageURLFilter: function(url)
    {
        if (!url)
            this._messageURLFilters = {};
        else
            delete this._messageURLFilters[url];

        WebInspector.settings.messageURLFilters.set(this._messageURLFilters);
        this._filterChanged();
    },

    /**
     * @returns {Object}
     */
    get messageURLFilters()
    {
        return this._messageURLFilters;
    },

    /**
     * @param {WebInspector.ConsoleMessage} message
     * @return {boolean}
     */
    shouldBeVisible: function(message)
    {
        if ((message.type === WebInspector.ConsoleMessage.MessageType.StartGroup || message.type === WebInspector.ConsoleMessage.MessageType.StartGroupCollapsed || message.type === WebInspector.ConsoleMessage.MessageType.EndGroup))
            return true;

        if (message.url && this._messageURLFilters[message.url])
            return false;

        if (message.level && this._messageLevelFilters[message.level])
            return false;

        if (this._filterRegex) {
            this._filterRegex.lastIndex = 0;
            if (!message.matchesRegex(this._filterRegex))
                return false;
        }

        // We store group keys, and we have resolved group by message source
        if (message.source) {
            if (this._sourceToKeyMap[message.source])
                return !this._messageSourceFilters[this._sourceToKeyMap[message.source]];
            else
                return !this._messageSourceFilters[this._otherKey];
        }


        return true;
    },

    reset: function()
    {
        this._messageSourceFilters = {};
        WebInspector.settings.messageSourceFilters.set(this._messageSourceFilters);
        this._messageURLFilters = {};
        WebInspector.settings.messageURLFilters.set(this._messageURLFilters);
        this._messageLevelFilters = {};
        WebInspector.settings.messageLevelFilters.set(this._messageLevelFilters);
        this._filterChanged();
    },

    /**
     * @param {string} query
     */
    performFilter: function(query)
    {
        if (!query)
            delete this._filterRegex;
        else
            this._filterRegex = createPlainTextSearchRegex(query, "gi");

        this._filterChanged();
    },

    /**
     * @param {string} sourceGroup
     * @private
     */
    _toggleMessageSourceFilter: function(sourceGroup)
    {
        if (!this._messageSourceFilters[sourceGroup])
            this._messageSourceFilters[sourceGroup] = true;
        else
            delete this._messageSourceFilters[sourceGroup];

        WebInspector.settings.messageSourceFilters.set(this._messageSourceFilters);
        this._filterChanged();
    },

    /**
     * @private
     */
    _updateSourceFilterButton: function()
    {
        var hasActiveSourceFilter = false;
        for (var sourceGroup in WebInspector.ConsoleViewFilter._messageSourceGroups) {
            if (this._messageSourceFilters[sourceGroup]) {
                hasActiveSourceFilter = true;
                break;
            }
        }

        this.sourceFilterButton.state = hasActiveSourceFilter;
    },

    /**
     * @param {Event} event
     * @returns {WebInspector.ContextMenu}
     * @private
     */
    _createSourceFilterMenu: function(event)
    {
        var menu = new WebInspector.ContextMenu(event);

        for (var sourceGroup in WebInspector.ConsoleViewFilter._messageSourceGroups) {
            var filter = WebInspector.ConsoleViewFilter._messageSourceGroups[sourceGroup];

            menu.appendCheckboxItem(WebInspector.UIString(WebInspector.UIString(filter.title)), this._toggleMessageSourceFilter.bind(this, sourceGroup), !this._messageSourceFilters[sourceGroup]);
        }

        return menu;
    },

    /**
     * @param {string} level
     * @param {string} label
     * @private
     */
    _createLevelFilterBarElement: function(level, label)
    {
        var categoryElement = document.createElement("li");
        categoryElement.category = level;
        categoryElement.className = level;
        categoryElement.textContent = label;
        categoryElement.addEventListener("click", this._toggleLevelFilter.bind(this, level), false);

        this._filterBarElements[level] = categoryElement;
        this.filterBarElement.appendChild(categoryElement);
    },

    /**
     * @param {string} level
     * @param {Event} event
     * @private
     */
    _toggleLevelFilter: function(level, event)
    {
        var isMac = WebInspector.isMac();
        var selectMultiple = false;
        if (isMac && event.metaKey && !event.ctrlKey && !event.altKey && !event.shiftKey)
            selectMultiple = true;
        if (!isMac && event.ctrlKey && !event.metaKey && !event.altKey && !event.shiftKey)
            selectMultiple = true;

        if (level === "all")
            this._messageLevelFilters = {};
        else {
            if (!selectMultiple) {
                this._messageLevelFilters = {error: true, warning: true, log: true, debug: true};
                delete this._messageLevelFilters[level];
            } else {
                if (this._messageLevelFilters[level])
                    delete this._messageLevelFilters[level];
                else
                    this._messageLevelFilters[level] = true;
            }
        }

        WebInspector.settings.messageLevelFilters.set(this._messageLevelFilters);
        this._filterChanged();
    },

    /**
     * @private
     */
    _updateLevelFilterBar: function()
    {
        var all = !(this._messageLevelFilters["error"] || this._messageLevelFilters["warning"] || this._messageLevelFilters["log"] || this._messageLevelFilters["debug"]);

        this._filterBarElements["all"].enableStyleClass("selected", all);

        this._filterBarElements["error"].enableStyleClass("selected", !all && !this._messageLevelFilters["error"]);
        this._filterBarElements["warning"].enableStyleClass("selected", !all && !this._messageLevelFilters["warning"]);
        this._filterBarElements["log"].enableStyleClass("selected", !all && !this._messageLevelFilters["log"]);
        this._filterBarElements["debug"].enableStyleClass("selected", !all && !this._messageLevelFilters["debug"]);
    },

    /**
     * @param {Event} event
     * @private
     */
    _handleSourceFilterButtonClick: function(event)
    {
        if (!event.button)
            this._createSourceFilterMenu(event).showSoftMenu();
    },

    __proto__: WebInspector.Object.prototype
};


/**
 * @constructor
 * @extends WebInspector.ConsoleMessage
 */
WebInspector.ConsoleCommand = function(text)
{
    this.text = text;
}

WebInspector.ConsoleCommand.prototype = {
    wasShown: function()
    {
    },

    willHide: function()
    {
    },

    clearHighlight: function()
    {
        var highlightedMessage = this._formattedCommand;
        delete this._formattedCommand;
        this._formatCommand();
        this._element.replaceChild(this._formattedCommand, highlightedMessage);
    },

    /**
     * @param {RegExp} regexObject
     */
    highlightSearchResults: function(regexObject)
    {
        regexObject.lastIndex = 0;
        var match = regexObject.exec(this.text);
        var matchRanges = [];
        while (match) {
            matchRanges.push({ offset: match.index, length: match[0].length });
            match = regexObject.exec(this.text);
        }
        WebInspector.highlightSearchResults(this._formattedCommand, matchRanges);
        this._element.scrollIntoViewIfNeeded();
    },

    /**
     * @param {RegExp} regexObject
     */
    matchesRegex: function(regexObject)
    {
        regexObject.lastIndex = 0;
        return regexObject.test(this.text);
    },

    toMessageElement: function()
    {
        if (!this._element) {
            this._element = document.createElement("div");
            this._element.command = this;
            this._element.className = "console-user-command";

            this._formatCommand();
            this._element.appendChild(this._formattedCommand);
        }
        return this._element;
    },

    _formatCommand: function()
    {
        this._formattedCommand = document.createElement("span");
        this._formattedCommand.className = "console-message-text source-code";
        this._formattedCommand.textContent = this.text;
    },

    __proto__: WebInspector.ConsoleMessage.prototype
}

/**
 * @extends {WebInspector.ConsoleMessageImpl}
 * @constructor
 * @param {WebInspector.RemoteObject} result
 * @param {boolean} wasThrown
 * @param {WebInspector.ConsoleCommand} originatingCommand
 * @param {WebInspector.Linkifier} linkifier
 * @param {string=} url
 * @param {number=} lineNumber
 * @param {number=} columnNumber
 */
WebInspector.ConsoleCommandResult = function(result, wasThrown, originatingCommand, linkifier, url, lineNumber, columnNumber)
{
    var level = (wasThrown ? WebInspector.ConsoleMessage.MessageLevel.Error : WebInspector.ConsoleMessage.MessageLevel.Log);
    this.originatingCommand = originatingCommand;
    WebInspector.ConsoleMessageImpl.call(this, WebInspector.ConsoleMessage.MessageSource.JS, level, "", linkifier, WebInspector.ConsoleMessage.MessageType.Result, url, lineNumber, columnNumber, undefined, [result]);
}

WebInspector.ConsoleCommandResult.prototype = {
    /**
     * @override
     * @param {WebInspector.RemoteObject} array
     * @return {boolean}
     */
    useArrayPreviewInFormatter: function(array)
    {
        return false;
    },

    toMessageElement: function()
    {
        var element = WebInspector.ConsoleMessageImpl.prototype.toMessageElement.call(this);
        element.addStyleClass("console-user-command-result");
        return element;
    },

    __proto__: WebInspector.ConsoleMessageImpl.prototype
}

/**
 * @constructor
 */
WebInspector.ConsoleGroup = function(parentGroup)
{
    this.parentGroup = parentGroup;

    var element = document.createElement("div");
    element.className = "console-group";
    element.group = this;
    this.element = element;

    if (parentGroup) {
        var bracketElement = document.createElement("div");
        bracketElement.className = "console-group-bracket";
        element.appendChild(bracketElement);
    }

    var messagesElement = document.createElement("div");
    messagesElement.className = "console-group-messages";
    element.appendChild(messagesElement);
    this.messagesElement = messagesElement;
}

WebInspector.ConsoleGroup.prototype = {
    /**
     * @param {WebInspector.ConsoleMessage} message
     * @param {Node=} node
     */
    addMessage: function(message, node)
    {
        var element = message.toMessageElement();

        if (message.type === WebInspector.ConsoleMessage.MessageType.StartGroup || message.type === WebInspector.ConsoleMessage.MessageType.StartGroupCollapsed) {
            this.messagesElement.parentNode.insertBefore(element, this.messagesElement);
            element.addEventListener("click", this._titleClicked.bind(this), false);
            var groupElement = element.enclosingNodeOrSelfWithClass("console-group");
            if (groupElement && message.type === WebInspector.ConsoleMessage.MessageType.StartGroupCollapsed)
                groupElement.addStyleClass("collapsed");
        } else {
            this.messagesElement.insertBefore(element, node || null);
            message.wasShown();
        }

        if (element.previousSibling && message.originatingCommand && element.previousSibling.command === message.originatingCommand)
            element.previousSibling.addStyleClass("console-adjacent-user-command-result");
    },

    _titleClicked: function(event)
    {
        var groupTitleElement = event.target.enclosingNodeOrSelfWithClass("console-group-title");
        if (groupTitleElement) {
            var groupElement = groupTitleElement.enclosingNodeOrSelfWithClass("console-group");
            if (groupElement)
                if (groupElement.hasStyleClass("collapsed"))
                    groupElement.removeStyleClass("collapsed");
                else
                    groupElement.addStyleClass("collapsed");
            groupTitleElement.scrollIntoViewIfNeeded(true);
        }

        event.consume(true);
    }
}

/**
 * @type {?WebInspector.ConsoleView}
 */
WebInspector.consoleView = null;

WebInspector.ConsoleMessage.create = function(source, level, message, type, url, line, column, repeatCount, parameters, stackTrace, requestId, isOutdated)
{
    return new WebInspector.ConsoleMessageImpl(source, level, message, WebInspector.consoleView._linkifier, type, url, line, column, repeatCount, parameters, stackTrace, requestId, isOutdated);
}