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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
const { Cc, Ci, Cu, ChromeWorker } = require("chrome");
const { Class } = require("sdk/core/heritage");
const { OS } = require("resource://gre/modules/osfile.jsm");
const { emit } = require("sdk/event/core");
const { Store } = require("devtools/client/projecteditor/lib/stores/base");
const { Task } = require("devtools/shared/task");
const promise = require("promise");
const Services = require("Services");
const { on, forget } = require("devtools/client/projecteditor/lib/helpers/event");
const { FileResource } = require("devtools/client/projecteditor/lib/stores/resource");
const CHECK_LINKED_DIRECTORY_DELAY = 5000;
const SHOULD_LIVE_REFRESH = true;
// XXX: Ignores should be customizable
const IGNORE_REGEX = /(^\.)|(\~$)|(^node_modules$)/;
/**
* A LocalStore object maintains a collection of Resource objects
* from the file system.
*
* This object emits the following events:
* - "resource-added": When a resource is added
* - "resource-removed": When a resource is removed
*/
var LocalStore = Class({
extends: Store,
defaultCategory: "js",
initialize: function(path) {
this.initStore();
this.path = OS.Path.normalize(path);
this.rootPath = this.path;
this.displayName = this.path;
this.root = this._forPath(this.path);
this.notifyAdd(this.root);
this.refreshLoop = this.refreshLoop.bind(this);
this.refreshLoop();
},
destroy: function() {
clearTimeout(this._refreshTimeout);
if (this._refreshDeferred) {
this._refreshDeferred.reject("destroy");
}
if (this.worker) {
this.worker.terminate();
}
this._refreshTimeout = null;
this._refreshDeferred = null;
this.worker = null;
if (this.root) {
forget(this, this.root);
this.root.destroy();
}
},
toString: function() { return "[LocalStore:" + this.path + "]" },
/**
* Return a FileResource object for the given path. If a FileInfo
* is provided the resource will use it, otherwise the FileResource
* might not have full information until the next refresh.
*
* The following parameters are passed into the FileResource constructor
* See resource.js for information about them
*
* @param String path
* @param FileInfo info
* @returns Resource
*/
_forPath: function(path, info=null) {
if (this.resources.has(path)) {
return this.resources.get(path);
}
let resource = FileResource(this, path, info);
this.resources.set(path, resource);
return resource;
},
/**
* Return a promise that resolves to a fully-functional FileResource
* within this project. This will hit the disk for stat info.
* options:
*
* create: If true, a resource will be created even if the underlying
* file doesn't exist.
*/
resourceFor: function(path, options) {
path = OS.Path.normalize(path);
if (this.resources.has(path)) {
return promise.resolve(this.resources.get(path));
}
if (!this.contains(path)) {
return promise.reject(new Error(path + " does not belong to " + this.path));
}
return Task.spawn(function*() {
let parent = yield this.resourceFor(OS.Path.dirname(path));
let info;
try {
info = yield OS.File.stat(path);
} catch (ex if ex instanceof OS.File.Error && ex.becauseNoSuchFile) {
if (!options.create) {
throw ex;
}
}
let resource = this._forPath(path, info);
parent.addChild(resource);
return resource;
}.bind(this));
},
refreshLoop: function() {
// XXX: Once Bug 958280 adds a watch function, will not need to forever loop here.
this.refresh().then(() => {
if (SHOULD_LIVE_REFRESH) {
this._refreshTimeout = setTimeout(this.refreshLoop,
CHECK_LINKED_DIRECTORY_DELAY);
}
});
},
_refreshTimeout: null,
_refreshDeferred: null,
/**
* Refresh the directory structure.
*/
refresh: function(path=this.rootPath) {
if (this._refreshDeferred) {
return this._refreshDeferred.promise;
}
this._refreshDeferred = promise.defer();
let worker = this.worker = new ChromeWorker("chrome://devtools/content/projecteditor/lib/helpers/readdir.js");
let start = Date.now();
worker.onmessage = evt => {
// console.log("Directory read finished in " + ( Date.now() - start ) +"ms", evt);
for (path in evt.data) {
let info = evt.data[path];
info.path = path;
let resource = this._forPath(path, info);
resource.info = info;
if (info.isDir) {
let newChildren = new Set();
for (let childPath of info.children) {
childInfo = evt.data[childPath];
newChildren.add(this._forPath(childPath, childInfo));
}
resource.setChildren(newChildren);
}
resource.info.children = null;
}
worker = null;
this._refreshDeferred.resolve();
this._refreshDeferred = null;
};
worker.onerror = ex => {
console.error(ex);
worker = null;
this._refreshDeferred.reject(ex);
this._refreshDeferred = null;
}
worker.postMessage({ path: this.rootPath, ignore: IGNORE_REGEX });
return this._refreshDeferred.promise;
},
/**
* Returns true if the given path would be a child of the store's
* root directory.
*/
contains: function(path) {
path = OS.Path.normalize(path);
let thisPath = OS.Path.split(this.rootPath);
let thatPath = OS.Path.split(path)
if (!(thisPath.absolute && thatPath.absolute)) {
throw new Error("Contains only works with absolute paths.");
}
if (thisPath.winDrive && (thisPath.winDrive != thatPath.winDrive)) {
return false;
}
if (thatPath.components.length <= thisPath.components.length) {
return false;
}
for (let i = 0; i < thisPath.components.length; i++) {
if (thisPath.components[i] != thatPath.components[i]) {
return false;
}
}
return true;
}
});
exports.LocalStore = LocalStore;
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