DevTools: [Persistence] split out WI.DefaultMapping

third_party/WebKit/Source/devtools/front_end/persistence/DefaultMapping.js

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @constructor
+ * @param {!WebInspector.Workspace} workspace
+ * @param {!WebInspector.FileSystemMapping} fileSystemMapping
+ * @param {function(!WebInspector.PersistenceBinding)} onBindingCreated
+ * @param {function(!WebInspector.PersistenceBinding)} onBindingRemoved
+ */
+WebInspector.DefaultMapping = function(workspace, fileSystemMapping, onBindingCreated, onBindingRemoved)
+{
+    this._workspace = workspace;
+    this._fileSystemMapping = fileSystemMapping;
+    /** @type {!Set<!WebInspector.PersistenceBinding>} */
+    this._bindings = new Set();
+    this._onBindingCreated = onBindingCreated;
+    this._onBindingRemoved = onBindingRemoved;
+
+    this._eventListeners = [
+        workspace.addEventListener(WebInspector.Workspace.Events.UISourceCodeAdded, this._onUISourceCodeAdded, this),
+        workspace.addEventListener(WebInspector.Workspace.Events.UISourceCodeRemoved, this._onUISourceCodeRemoved, this),
+        workspace.addEventListener(WebInspector.Workspace.Events.ProjectRemoved, this._onProjectRemoved, this),
+        this._fileSystemMapping.addEventListener(WebInspector.FileSystemMapping.Events.FileMappingAdded, this._remap, this),
+        this._fileSystemMapping.addEventListener(WebInspector.FileSystemMapping.Events.FileMappingRemoved, this._remap, this)
+    ];
+    this._remap();
+}
+
+WebInspector.DefaultMapping._binding = Symbol("DefaultMapping.Binding");
+
+WebInspector.DefaultMapping.prototype = {
+    _remap: function()
+    {
+        for (var binding of this._bindings.valuesArray())
+            this._unbind(binding.network);
+        var networkProjects = this._workspace.projectsForType(WebInspector.projectTypes.Network);
+        for (var networkProject of networkProjects) {
+            for (var uiSourceCode of networkProject.uiSourceCodes())
+                this._bind(uiSourceCode);
+        }
+    },
+
+    /**
+     * @param {!WebInspector.Event} event
+     */
+    _onUISourceCodeAdded: function(event)
+    {
+        var uiSourceCode = /** @type {!WebInspector.UISourceCode} */(event.data);
+        this._bind(uiSourceCode);
+    },
+
+    /**
+     * @param {!WebInspector.Event} event
+     */
+    _onUISourceCodeRemoved: function(event)
+    {
+        var uiSourceCode = /** @type {!WebInspector.UISourceCode} */(event.data);
+        this._unbind(uiSourceCode);
+    },
+
+    /**
+     * @param {!WebInspector.Event} event
+     */
+    _onProjectRemoved: function(event)
+    {
+        var project = /** @type {!WebInspector.Project} */(event.data);
+        for (var uiSourceCode of project.uiSourceCodes())
+            this._unbind(uiSourceCode);
+    },
+
+    /**
+     * @param {!WebInspector.UISourceCode} uiSourceCode
+     * @return {?WebInspector.PersistenceBinding}
+     */
+    _createBinding: function(uiSourceCode)
+    {
+        if (uiSourceCode.project().type() === WebInspector.projectTypes.FileSystem) {
+            var fileSystemPath = WebInspector.FileSystemWorkspaceBinding.fileSystemPath(uiSourceCode.project().id());
+            var networkURL = this._fileSystemMapping.networkURLForFileSystemURL(fileSystemPath, uiSourceCode.url());
+            var networkSourceCode = networkURL ? this._workspace.uiSourceCodeForURL(networkURL) : null;
+            return networkSourceCode ? new WebInspector.PersistenceBinding(networkSourceCode, uiSourceCode) : null;
+        }
+        if (uiSourceCode.project().type() === WebInspector.projectTypes.Network) {
+            var file = this._fileSystemMapping.fileForURL(uiSourceCode.url());
+            var projectId = file ? WebInspector.FileSystemWorkspaceBinding.projectId(file.fileSystemPath) : null;
+            var fileSourceCode = file && projectId ? this._workspace.uiSourceCode(projectId, file.fileURL) : null;
+            return fileSourceCode ? new WebInspector.PersistenceBinding(uiSourceCode, fileSourceCode) : null;
+        }
+        return null;
+    },
+
+    /**
+     * @param {!WebInspector.UISourceCode} uiSourceCode
+     */
+    _bind: function(uiSourceCode)
+    {
+        console.assert(!uiSourceCode[WebInspector.DefaultMapping._binding], "Cannot bind already bound UISourceCode!");
+        var binding = this._createBinding(uiSourceCode);
+        if (!binding)
+            return;
+        this._bindings.add(binding);
+        binding.network[WebInspector.DefaultMapping._binding] = binding;
+        binding.fileSystem[WebInspector.DefaultMapping._binding] = binding;
+
+        binding.fileSystem.addEventListener(WebInspector.UISourceCode.Events.TitleChanged, this._onFileSystemUISourceCodeRenamed, this);
+
+        this._onBindingCreated.call(null, binding);
+    },
+
+    /**
+     * @param {!WebInspector.UISourceCode} uiSourceCode
+     */
+    _unbind: function(uiSourceCode)
+    {
+        var binding = uiSourceCode[WebInspector.DefaultMapping._binding];
+        if (!binding)
+            return;
+        this._bindings.delete(binding);
+        binding.network[WebInspector.DefaultMapping._binding] = null;
+        binding.fileSystem[WebInspector.DefaultMapping._binding] = null;
+
+        binding.fileSystem.removeEventListener(WebInspector.UISourceCode.Events.TitleChanged, this._onFileSystemUISourceCodeRenamed, this);
+
+        this._onBindingRemoved.call(null, binding);
+    },
+
+    /**
+     * @param {!WebInspector.Event} event
+     */
+    _onFileSystemUISourceCodeRenamed: function(event)
+    {
+        var uiSourceCode = /** @type {!WebInspector.UISourceCode} */(event.target);
+        var binding = uiSourceCode[WebInspector.DefaultMapping._binding];
+        this._unbind(binding.network);
+        this._bind(binding.network);
+    },
+
+    dispose: function()
+    {
+        WebInspector.EventTarget.removeEventListeners(this._eventListeners);
+    }
+}