Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443)

Change-Id: I3b1d8a2808782c9f34d50240000e20cb38d3680f
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>

1 files changed, 301 insertions, 0 deletions

diff --git a/Source/WebInspectorUI/UserInterface/Controllers/JavaScriptRuntimeCompletionProvider.js b/Source/WebInspectorUI/UserInterface/Controllers/JavaScriptRuntimeCompletionProvider.js
new file mode 100644
index 000000000..24f327baa
--- /dev/null
+++ b/Source/WebInspectorUI/UserInterface/Controllers/JavaScriptRuntimeCompletionProvider.js
@@ -0,0 +1,301 @@
+/*
+ * Copyright (C) 2013 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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.
+ */
+
+Object.defineProperty(WebInspector, "javaScriptRuntimeCompletionProvider",
+{
+    get: function()
+    {
+        if (!WebInspector.JavaScriptRuntimeCompletionProvider._instance)
+            WebInspector.JavaScriptRuntimeCompletionProvider._instance = new WebInspector.JavaScriptRuntimeCompletionProvider;
+        return WebInspector.JavaScriptRuntimeCompletionProvider._instance;
+    }
+});
+
+WebInspector.JavaScriptRuntimeCompletionProvider = class JavaScriptRuntimeCompletionProvider extends WebInspector.Object
+{
+    constructor()
+    {
+        super();
+
+        console.assert(!WebInspector.JavaScriptRuntimeCompletionProvider._instance);
+
+        WebInspector.debuggerManager.addEventListener(WebInspector.DebuggerManager.Event.ActiveCallFrameDidChange, this._clearLastProperties, this);
+    }
+
+    // Protected
+
+    completionControllerCompletionsNeeded(completionController, defaultCompletions, base, prefix, suffix, forced)
+    {
+        // Don't allow non-forced empty prefix completions unless the base is that start of property access.
+        if (!forced && !prefix && !/[.[]$/.test(base)) {
+            completionController.updateCompletions(null);
+            return;
+        }
+
+        // If the base ends with an open parentheses or open curly bracket then treat it like there is
+        // no base so we get global object completions.
+        if (/[({]$/.test(base))
+            base = "";
+
+        var lastBaseIndex = base.length - 1;
+        var dotNotation = base[lastBaseIndex] === ".";
+        var bracketNotation = base[lastBaseIndex] === "[";
+
+        if (dotNotation || bracketNotation) {
+            base = base.substring(0, lastBaseIndex);
+
+            // Don't suggest anything for an empty base that is using dot notation.
+            // Bracket notation with an empty base will be treated as an array.
+            if (!base && dotNotation) {
+                completionController.updateCompletions(defaultCompletions);
+                return;
+            }
+
+            // Don't allow non-forced empty prefix completions if the user is entering a number, since it might be a float.
+            // But allow number completions if the base already has a decimal, so "10.0." will suggest Number properties.
+            if (!forced && !prefix && dotNotation && base.indexOf(".") === -1 && parseInt(base, 10) == base) {
+                completionController.updateCompletions(null);
+                return;
+            }
+
+            // An empty base with bracket notation is not property access, it is an array.
+            // Clear the bracketNotation flag so completions are not quoted.
+            if (!base && bracketNotation)
+                bracketNotation = false;
+        }
+
+        // If the base is the same as the last time, we can reuse the property names we have already gathered.
+        // Doing this eliminates delay caused by the async nature of the code below and it only calls getters
+        // and functions once instead of repetitively. Sure, there can be difference each time the base is evaluated,
+        // but this optimization gives us more of a win. We clear the cache after 30 seconds or when stepping in the
+        // debugger to make sure we don't use stale properties in most cases.
+        if (this._lastBase === base && this._lastPropertyNames) {
+            receivedPropertyNames.call(this, this._lastPropertyNames);
+            return;
+        }
+
+        this._lastBase = base;
+        this._lastPropertyNames = null;
+
+        var activeCallFrame = WebInspector.debuggerManager.activeCallFrame;
+        if (!base && activeCallFrame && !this._alwaysEvaluateInWindowContext)
+            activeCallFrame.collectScopeChainVariableNames(receivedPropertyNames.bind(this));
+        else
+            WebInspector.runtimeManager.evaluateInInspectedWindow(base, "completion", true, true, false, false, false, evaluated.bind(this));
+
+        function updateLastPropertyNames(propertyNames)
+        {
+            if (this._clearLastPropertiesTimeout)
+                clearTimeout(this._clearLastPropertiesTimeout);
+            this._clearLastPropertiesTimeout = setTimeout(this._clearLastProperties.bind(this), WebInspector.JavaScriptLogViewController.CachedPropertiesDuration);
+
+            this._lastPropertyNames = propertyNames || {};
+        }
+
+        function evaluated(result, wasThrown)
+        {
+            if (wasThrown || !result || result.type === "undefined" || (result.type === "object" && result.subtype === "null")) {
+                RuntimeAgent.releaseObjectGroup("completion");
+
+                updateLastPropertyNames.call(this, {});
+                completionController.updateCompletions(defaultCompletions);
+
+                return;
+            }
+
+            function getArrayCompletions(primitiveType)
+            {
+                var array = this;
+                var arrayLength;
+
+                var resultSet = {};
+                for (var o = array; o; o = o.__proto__) {
+                    try {
+                        if (o === array && o.length) {
+                            // If the array type has a length, don't include a list of all the indexes.
+                            // Include it at the end and the frontend can build the list.
+                            arrayLength = o.length;
+                        } else {
+                            var names = Object.getOwnPropertyNames(o);
+                            for (var i = 0; i < names.length; ++i)
+                                resultSet[names[i]] = true;
+                        }
+                    } catch (e) {
+                        // Ignore
+                    }
+                }
+
+                if (arrayLength)
+                    resultSet["length"] = arrayLength;
+
+                return resultSet;
+            }
+
+            function getCompletions(primitiveType)
+            {
+                var object;
+                if (primitiveType === "string")
+                    object = new String("");
+                else if (primitiveType === "number")
+                    object = new Number(0);
+                else if (primitiveType === "boolean")
+                    object = new Boolean(false);
+                else if (primitiveType === "symbol")
+                    object = Symbol();
+                else
+                    object = this;
+
+                var resultSet = {};
+                for (var o = object; o; o = o.__proto__) {
+                    try {
+                        var names = Object.getOwnPropertyNames(o);
+                        for (var i = 0; i < names.length; ++i)
+                            resultSet[names[i]] = true;
+                    } catch (e) {
+                        // Ignore
+                    }
+                }
+
+                return resultSet;
+            }
+
+            if (result.subtype === "array")
+                result.callFunctionJSON(getArrayCompletions, undefined, receivedArrayPropertyNames.bind(this));
+            else if (result.type === "object" || result.type === "function")
+                result.callFunctionJSON(getCompletions, undefined, receivedPropertyNames.bind(this));
+            else if (result.type === "string" || result.type === "number" || result.type === "boolean" || result.type === "symbol")
+                WebInspector.runtimeManager.evaluateInInspectedWindow("(" + getCompletions + ")(\"" + result.type + "\")", "completion", false, true, true, false, false, receivedPropertyNamesFromEvaluate.bind(this));
+            else
+                console.error("Unknown result type: " + result.type);
+        }
+
+        function receivedPropertyNamesFromEvaluate(object, wasThrown, result)
+        {
+            receivedPropertyNames.call(this, result && !wasThrown ? result.value : null);
+        }
+
+        function receivedArrayPropertyNames(propertyNames)
+        {
+            // FIXME: <https://webkit.org/b/143589> Web Inspector: Better handling for large collections in Object Trees
+            // If there was an array like object, we generate autocompletion up to 1000 indexes, but this should
+            // handle a list with arbitrary length.
+            if (propertyNames && typeof propertyNames.length === "number") {
+                var max = Math.min(propertyNames.length, 1000);
+                for (var i = 0; i < max; ++i)
+                    propertyNames[i] = true;
+            }
+
+            receivedPropertyNames.call(this, propertyNames);
+        }
+
+        function receivedPropertyNames(propertyNames)
+        {
+            propertyNames = propertyNames || {};
+
+            updateLastPropertyNames.call(this, propertyNames);
+
+            RuntimeAgent.releaseObjectGroup("completion");
+
+            if (!base) {
+                var commandLineAPI = ["$", "$$", "$x", "dir", "dirxml", "keys", "values", "profile", "profileEnd", "monitorEvents", "unmonitorEvents", "inspect", "copy", "clear", "getEventListeners", "$0", "$_"];
+                if (WebInspector.debuggerManager.paused && WebInspector.debuggerManager.pauseReason === WebInspector.DebuggerManager.PauseReason.Exception)
+                    commandLineAPI.push("$exception");
+                for (var i = 0; i < commandLineAPI.length; ++i)
+                    propertyNames[commandLineAPI[i]] = true;
+
+                // FIXME: Due to caching, sometimes old $n values show up as completion results even though they are not available. We should clear that proactively.
+                for (var i = 1; i <= WebInspector.ConsoleCommandResultMessage.maximumSavedResultIndex; ++i)
+                    propertyNames["$" + i] = true;
+            }
+
+            propertyNames = Object.keys(propertyNames);
+
+            var implicitSuffix = "";
+            if (bracketNotation) {
+                var quoteUsed = prefix[0] === "'" ? "'" : "\"";
+                if (suffix !== "]" && suffix !== quoteUsed)
+                    implicitSuffix = "]";
+            }
+
+            var completions = defaultCompletions;
+            var knownCompletions = completions.keySet();
+
+            for (var i = 0; i < propertyNames.length; ++i) {
+                var property = propertyNames[i];
+
+                if (dotNotation && !/^[a-zA-Z_$][a-zA-Z0-9_$]*$/.test(property))
+                    continue;
+
+                if (bracketNotation) {
+                    if (parseInt(property) != property)
+                        property = quoteUsed + property.escapeCharacters(quoteUsed + "\\") + (suffix !== quoteUsed ? quoteUsed : "");
+                }
+
+                if (!property.startsWith(prefix) || property in knownCompletions)
+                    continue;
+
+                completions.push(property);
+                knownCompletions[property] = true;
+            }
+
+            function compare(a, b)
+            {
+                // Try to sort in numerical order first.
+                let numericCompareResult = a - b;
+                if (!isNaN(numericCompareResult))
+                    return numericCompareResult;
+
+                // Sort __defineGetter__, __lookupGetter__, and friends last.
+                let aRareProperty = a.startsWith("__") && a.endsWith("__");
+                let bRareProperty = b.startsWith("__") && b.endsWith("__");
+                if (aRareProperty && !bRareProperty)
+                    return 1;
+                if (!aRareProperty && bRareProperty)
+                    return -1;
+
+                // Not numbers, sort as strings.
+                return a.localeCompare(b);
+            }
+
+            completions.sort(compare);
+
+            completionController.updateCompletions(completions, implicitSuffix);
+        }
+    }
+
+    // Private
+
+    _clearLastProperties()
+    {
+        if (this._clearLastPropertiesTimeout) {
+            clearTimeout(this._clearLastPropertiesTimeout);
+            delete this._clearLastPropertiesTimeout;
+        }
+
+        // Clear the cache of property names so any changes while stepping or sitting idle get picked up if the same
+        // expression is evaluated again.
+        this._lastPropertyNames = null;
+    }
+};