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/*
* 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(WI, "javaScriptRuntimeCompletionProvider",
{
get: function()
{
if (!WI.JavaScriptRuntimeCompletionProvider._instance)
WI.JavaScriptRuntimeCompletionProvider._instance = new WI.JavaScriptRuntimeCompletionProvider;
return WI.JavaScriptRuntimeCompletionProvider._instance;
}
});
WI.JavaScriptRuntimeCompletionProvider = class JavaScriptRuntimeCompletionProvider extends WI.Object
{
constructor()
{
super();
console.assert(!WI.JavaScriptRuntimeCompletionProvider._instance);
WI.debuggerManager.addEventListener(WI.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 = WI.debuggerManager.activeCallFrame;
if (!base && activeCallFrame && !this._alwaysEvaluateInWindowContext)
activeCallFrame.collectScopeChainVariableNames(receivedPropertyNames.bind(this));
else {
let options = {objectGroup: "completion", includeCommandLineAPI: true, doNotPauseOnExceptionsAndMuteConsole: true, returnByValue: false, generatePreview: false, saveResult: false};
WI.runtimeManager.evaluateInInspectedWindow(base, options, evaluated.bind(this));
}
function updateLastPropertyNames(propertyNames)
{
if (this._clearLastPropertiesTimeout)
clearTimeout(this._clearLastPropertiesTimeout);
this._clearLastPropertiesTimeout = setTimeout(this._clearLastProperties.bind(this), WI.JavaScriptLogViewController.CachedPropertiesDuration);
this._lastPropertyNames = propertyNames || {};
}
function evaluated(result, wasThrown)
{
if (wasThrown || !result || result.type === "undefined" || (result.type === "object" && result.subtype === "null")) {
WI.runtimeManager.activeExecutionContext.target.RuntimeAgent.releaseObjectGroup("completion");
updateLastPropertyNames.call(this, {});
completionController.updateCompletions(defaultCompletions);
return;
}
function inspectedPage_evalResult_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 inspectedPage_evalResult_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(inspectedPage_evalResult_getArrayCompletions, undefined, receivedArrayPropertyNames.bind(this));
else if (result.type === "object" || result.type === "function")
result.callFunctionJSON(inspectedPage_evalResult_getCompletions, undefined, receivedPropertyNames.bind(this));
else if (result.type === "string" || result.type === "number" || result.type === "boolean" || result.type === "symbol") {
let options = {objectGroup: "completion", includeCommandLineAPI: false, doNotPauseOnExceptionsAndMuteConsole: true, returnByValue: false, generatePreview: false, saveResult: false};
WI.runtimeManager.evaluateInInspectedWindow("(" + inspectedPage_evalResult_getCompletions + ")(\"" + result.type + "\")", options, 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);
WI.runtimeManager.activeExecutionContext.target.RuntimeAgent.releaseObjectGroup("completion");
if (!base) {
var commandLineAPI = ["$", "$$", "$x", "dir", "dirxml", "keys", "values", "profile", "profileEnd", "monitorEvents", "unmonitorEvents", "inspect", "copy", "clear", "getEventListeners", "$0", "$_"];
if (WI.debuggerManager.paused) {
let targetData = WI.debuggerManager.dataForTarget(WI.runtimeManager.activeExecutionContext.target);
if (targetData.pauseReason === WI.DebuggerManager.PauseReason.Exception)
commandLineAPI.push("$exception");
}
for (var i = 0; i < commandLineAPI.length; ++i)
propertyNames[commandLineAPI[i]] = true;
// FIXME: Due to caching, sometimes old $n values show up as completion results even though they are not available. We should clear that proactively.
for (var i = 1; i <= WI.ConsoleCommandResultMessage.maximumSavedResultIndex; ++i)
propertyNames["$" + 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.extendedLocaleCompare(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;
}
};
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