Move JavaScript to root lib/ folder

lib/browser/api/navigation-controller.js

@@ -0,0 +1,188 @@
+const ipcMain = require('electron').ipcMain;
+
+var slice = [].slice;
+
+// The history operation in renderer is redirected to browser.
+ipcMain.on('ATOM_SHELL_NAVIGATION_CONTROLLER', function() {
+  var args, event, method, ref;
+  event = arguments[0], method = arguments[1], args = 3 <= arguments.length ? slice.call(arguments, 2) : [];
+  return (ref = event.sender)[method].apply(ref, args);
+});
+
+ipcMain.on('ATOM_SHELL_SYNC_NAVIGATION_CONTROLLER', function() {
+  var args, event, method, ref;
+  event = arguments[0], method = arguments[1], args = 3 <= arguments.length ? slice.call(arguments, 2) : [];
+  return event.returnValue = (ref = event.sender)[method].apply(ref, args);
+});
+
+// JavaScript implementation of Chromium's NavigationController.
+// Instead of relying on Chromium for history control, we compeletely do history
+// control on user land, and only rely on WebContents.loadURL for navigation.
+// This helps us avoid Chromium's various optimizations so we can ensure renderer
+// process is restarted everytime.
+var NavigationController = (function() {
+  function NavigationController(webContents) {
+    this.webContents = webContents;
+    this.clearHistory();
+
+    // webContents may have already navigated to a page.
+    if (this.webContents._getURL()) {
+      this.currentIndex++;
+      this.history.push(this.webContents._getURL());
+    }
+    this.webContents.on('navigation-entry-commited', (function(_this) {
+      return function(event, url, inPage, replaceEntry) {
+        var currentEntry;
+        if (_this.inPageIndex > -1 && !inPage) {
+
+          // Navigated to a new page, clear in-page mark.
+          _this.inPageIndex = -1;
+        } else if (_this.inPageIndex === -1 && inPage) {
+
+          // Started in-page navigations.
+          _this.inPageIndex = _this.currentIndex;
+        }
+        if (_this.pendingIndex >= 0) {
+
+          // Go to index.
+          _this.currentIndex = _this.pendingIndex;
+          _this.pendingIndex = -1;
+          return _this.history[_this.currentIndex] = url;
+        } else if (replaceEntry) {
+
+          // Non-user initialized navigation.
+          return _this.history[_this.currentIndex] = url;
+        } else {
+
+          // Normal navigation. Clear history.
+          _this.history = _this.history.slice(0, _this.currentIndex + 1);
+          currentEntry = _this.history[_this.currentIndex];
+          if ((currentEntry != null ? currentEntry.url : void 0) !== url) {
+            _this.currentIndex++;
+            return _this.history.push(url);
+          }
+        }
+      };
+    })(this));
+  }
+
+  NavigationController.prototype.loadURL = function(url, options) {
+    if (options == null) {
+      options = {};
+    }
+    this.pendingIndex = -1;
+    this.webContents._loadURL(url, options);
+    return this.webContents.emit('load-url', url, options);
+  };
+
+  NavigationController.prototype.getURL = function() {
+    if (this.currentIndex === -1) {
+      return '';
+    } else {
+      return this.history[this.currentIndex];
+    }
+  };
+
+  NavigationController.prototype.stop = function() {
+    this.pendingIndex = -1;
+    return this.webContents._stop();
+  };
+
+  NavigationController.prototype.reload = function() {
+    this.pendingIndex = this.currentIndex;
+    return this.webContents._loadURL(this.getURL(), {});
+  };
+
+  NavigationController.prototype.reloadIgnoringCache = function() {
+    this.pendingIndex = this.currentIndex;
+    return this.webContents._loadURL(this.getURL(), {
+      extraHeaders: "pragma: no-cache\n"
+    });
+  };
+
+  NavigationController.prototype.canGoBack = function() {
+    return this.getActiveIndex() > 0;
+  };
+
+  NavigationController.prototype.canGoForward = function() {
+    return this.getActiveIndex() < this.history.length - 1;
+  };
+
+  NavigationController.prototype.canGoToIndex = function(index) {
+    return index >= 0 && index < this.history.length;
+  };
+
+  NavigationController.prototype.canGoToOffset = function(offset) {
+    return this.canGoToIndex(this.currentIndex + offset);
+  };
+
+  NavigationController.prototype.clearHistory = function() {
+    this.history = [];
+    this.currentIndex = -1;
+    this.pendingIndex = -1;
+    return this.inPageIndex = -1;
+  };
+
+  NavigationController.prototype.goBack = function() {
+    if (!this.canGoBack()) {
+      return;
+    }
+    this.pendingIndex = this.getActiveIndex() - 1;
+    if (this.inPageIndex > -1 && this.pendingIndex >= this.inPageIndex) {
+      return this.webContents._goBack();
+    } else {
+      return this.webContents._loadURL(this.history[this.pendingIndex], {});
+    }
+  };
+
+  NavigationController.prototype.goForward = function() {
+    if (!this.canGoForward()) {
+      return;
+    }
+    this.pendingIndex = this.getActiveIndex() + 1;
+    if (this.inPageIndex > -1 && this.pendingIndex >= this.inPageIndex) {
+      return this.webContents._goForward();
+    } else {
+      return this.webContents._loadURL(this.history[this.pendingIndex], {});
+    }
+  };
+
+  NavigationController.prototype.goToIndex = function(index) {
+    if (!this.canGoToIndex(index)) {
+      return;
+    }
+    this.pendingIndex = index;
+    return this.webContents._loadURL(this.history[this.pendingIndex], {});
+  };
+
+  NavigationController.prototype.goToOffset = function(offset) {
+    var pendingIndex;
+    if (!this.canGoToOffset(offset)) {
+      return;
+    }
+    pendingIndex = this.currentIndex + offset;
+    if (this.inPageIndex > -1 && pendingIndex >= this.inPageIndex) {
+      this.pendingIndex = pendingIndex;
+      return this.webContents._goToOffset(offset);
+    } else {
+      return this.goToIndex(pendingIndex);
+    }
+  };
+
+  NavigationController.prototype.getActiveIndex = function() {
+    if (this.pendingIndex === -1) {
+      return this.currentIndex;
+    } else {
+      return this.pendingIndex;
+    }
+  };
+
+  NavigationController.prototype.length = function() {
+    return this.history.length;
+  };
+
+  return NavigationController;
+
+})();
+
+module.exports = NavigationController;