840 lines
21 KiB
Markdown
840 lines
21 KiB
Markdown
# browser-window
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The `BrowserWindow` class gives you ability to create a browser window, an
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example is:
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```javascript
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var BrowserWindow = require('browser-window');
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var win = new BrowserWindow({ width: 800, height: 600, show: false });
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win.on('closed', function() {
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win = null;
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});
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win.loadUrl('https://github.com');
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win.show();
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```
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You can also create a window without chrome by using
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[Frameless Window](frameless-window.md) API.
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## Class: BrowserWindow
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`BrowserWindow` is an
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[EventEmitter](http://nodejs.org/api/events.html#events_class_events_eventemitter).
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### new BrowserWindow(options)
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* `options` Object
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* `x` Integer - Window's left offset to screen
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* `y` Integer - Window's top offset to screen
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* `width` Integer - Window's width
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* `height` Integer - Window's height
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* `use-content-size` Boolean - The `width` and `height` would be used as web
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page's size, which means the actual window's size will include window
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frame's size and be slightly larger.
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* `center` Boolean - Show window in the center of the screen
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* `min-width` Integer - Minimum width
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* `min-height` Integer - Minimum height
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* `max-width` Integer - Maximum width
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* `max-height` Integer - Maximum height
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* `resizable` Boolean - Whether window is resizable
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* `always-on-top` Boolean - Whether the window should always stay on top of
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other windows
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* `fullscreen` Boolean - Whether the window should show in fullscreen, when
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set to `false` the fullscreen button would also be hidden on OS X
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* `skip-taskbar` Boolean - Do not show window in taskbar
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* `zoom-factor` Number - The default zoom factor of the page, zoom factor is
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zoom percent / 100, so `3.0` represents `300%`
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* `kiosk` Boolean - The kiosk mode
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* `title` String - Default window title
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* `icon` [Image](image.md) - The window icon, when omitted on Windows the
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executable's icon would be used as window icon
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* `show` Boolean - Whether window should be shown when created
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* `frame` Boolean - Specify `false` to create a
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[Frameless Window](frameless-window.md)
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* `node-integration` Boolean - Whether node integration is enabled, default
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is `true`
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* `accept-first-mouse` Boolean - Whether the web view accepts a single
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mouse-down event that simultaneously activates the window
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* `auto-hide-menu-bar` Boolean - Auto hide the menu bar unless the `Alt`
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key is pressed.
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* `enable-larger-than-screen` Boolean - Enable the window to be resized larger
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than screen.
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* `dark-theme` Boolean - Forces using dark theme for the window, only works on
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some GTK+3 desktop environments
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* `preload` String - Specifies a script that will be loaded before other
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scripts run in the window. This script will always have access to node APIs
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no matter whether node integration is turned on for the window, and the path
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of `preload` script has to be absolute path.
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* `transparent` Boolean - Makes the window [transparent](frameless-window.md)
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* `web-preferences` Object - Settings of web page's features
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* `javascript` Boolean
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* `web-security` Boolean
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* `images` Boolean
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* `java` Boolean
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* `text-areas-are-resizable` Boolean
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* `webgl` Boolean
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* `webaudio` Boolean
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* `plugins` Boolean - Whether plugins should be enabled, currently only
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`NPAPI` plugins are supported.
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* `extra-plugin-dirs` Array - Array of paths that would be searched for
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plugins. Note that if you want to add a directory under your app, you
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should use `__dirname` or `process.resourcesPath` to join the paths to
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make them absolute, using relative paths would make atom-shell search
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under current working directory.
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* `experimental-features` Boolean
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* `experimental-canvas-features` Boolean
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* `subpixel-font-scaling` Boolean
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* `overlay-scrollbars` Boolean
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* `overlay-fullscreen-video` Boolean
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* `shared-worker` Boolean
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* `direct-write` Boolean - Whether the DirectWrite font rendering system on
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Windows is enabled
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Creates a new `BrowserWindow` with native properties set by the `options`.
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Usually you only need to set the `width` and `height`, other properties will
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have decent default values.
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### Event: 'page-title-updated'
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* `event` Event
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Emitted when the document changed its title, calling `event.preventDefault()`
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would prevent the native window's title to change.
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### Event: 'close'
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* `event` Event
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Emitted when the window is going to be closed. It's emitted before the
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`beforeunload` and `unload` event of DOM, calling `event.preventDefault()`
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would cancel the close.
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Usually you would want to use the `beforeunload` handler to decide whether the
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window should be closed, which will also be called when the window is
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reloaded. In atom-shell, returning an empty string or `false` would cancel the
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close. An example is:
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```javascript
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window.onbeforeunload = function(e) {
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console.log('I do not want to be closed');
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// Unlike usual browsers, in which a string should be returned and the user is
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// prompted to confirm the page unload. atom-shell gives the power completely
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// to the developers, return empty string or false would prevent the unloading
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// now. You can also use the dialog API to let user confirm it.
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return false;
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};
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```
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### Event: 'closed'
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Emitted when the window is closed. After you have received this event you should
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remove the reference to the window and avoid using it anymore.
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### Event: 'unresponsive'
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Emitted when the web page becomes unresponsive.
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### Event: 'responsive'
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Emitted when the unresponsive web page becomes responsive again.
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### Event: 'blur'
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Emitted when window loses focus.
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### Event: 'focus'
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Emitted when window gains focus.
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### Event: 'maximize'
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Emitted when window is maximized.
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### Event: 'unmaximize'
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Emitted when window exits from maximized state.
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### Event: 'minimize'
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Emitted when window is minimized.
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### Event: 'restore'
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Emitted when window is restored from minimized state.
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### Event: 'enter-full-screen'
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Emitted when window enters full screen state.
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### Event: 'leave-full-screen'
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Emitted when window leaves full screen state.
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### Event: 'devtools-opened'
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Emitted when devtools is opened.
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### Event: 'devtools-closed'
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Emitted when devtools is closed.
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### Class Method: BrowserWindow.getAllWindows()
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Returns an array of all opened browser windows.
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### Class Method: BrowserWindow.getFocusedWindow()
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Returns the window that is focused in this application.
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### Class Method: BrowserWindow.fromWebContents(webContents)
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* `webContents` WebContents
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Find a window according to the `webContents` it owns
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### Class Method: BrowserWindow.fromId(id)
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* `id` Integer
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Find a window according to its ID.
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### Class Method: BrowserWindow.addDevToolsExtension(path)
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* `path` String
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Adds devtools extension located at `path`, and returns extension's name.
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The extension will be remembered so you only need to call this API once, this
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API is not for programming use.
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### Class Method: BrowserWindow.removeDevToolsExtension(name)
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* `name` String
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Remove the devtools extension whose name is `name`.
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### BrowserWindow.webContents
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The `WebContents` object this window owns, all web page related events and
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operations would be done via it.
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**Note:** Users should never store this object because it may becomes `null`
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when the web page has crashed.
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### BrowserWindow.devToolsWebContents
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Get the `WebContents` of devtools of this window.
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**Note:** Users should never store this object because it may becomes `null`
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when the devtools has been closed.
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### BrowserWindow.id
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Get the unique ID of this window.
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### BrowserWindow.destroy()
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Force closing the window, the `unload` and `beforeunload` event won't be emitted
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for the web page, and `close` event would also not be emitted for this window,
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but it would guarantee the `closed` event to be emitted.
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You should only use this method when the web page has crashed.
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### BrowserWindow.close()
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Try to close the window, this has the same effect with user manually clicking
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the close button of the window. The web page may cancel the close though, see
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the [close event](window#event-close).
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### BrowserWindow.focus()
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Focus on the window.
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### BrowserWindow.isFocused()
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Returns whether the window is focused.
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### BrowserWindow.show()
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Shows and gives focus to the window.
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### BrowserWindow.showInactive()
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Shows the window but doesn't focus on it.
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### BrowserWindow.hide()
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Hides the window.
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### BrowserWindow.isVisible()
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Returns whether the window is visible to the user.
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### BrowserWindow.maximize()
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Maximizes the window.
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### BrowserWindow.unmaximize()
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Unmaximizes the window.
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### BrowserWindow.isMaximized()
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Returns whether the window is maximized.
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### BrowserWindow.minimize()
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Minimizes the window. On some platforms the minimized window will be shown in
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the Dock.
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### BrowserWindow.restore()
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Restores the window from minimized state to its previous state.
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### BrowserWindow.isMinimized()
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Returns whether the window is minimized.
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### BrowserWindow.setFullScreen(flag)
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* `flag` Boolean
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Sets whether the window should be in fullscreen mode.
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### BrowserWindow.isFullScreen()
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Returns whether the window is in fullscreen mode.
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### BrowserWindow.setSize(width, height)
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* `width` Integer
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* `height` Integer
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Resizes the window to `width` and `height`.
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### BrowserWindow.getSize()
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Returns an array that contains window's width and height.
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### BrowserWindow.setContentSize(width, height)
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* `width` Integer
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* `height` Integer
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Resizes the window's client area (e.g. the web page) to `width` and `height`.
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### BrowserWindow.getContentSize()
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Returns an array that contains window's client area's width and height.
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### BrowserWindow.setMinimumSize(width, height)
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* `width` Integer
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* `height` Integer
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Sets the minimum size of window to `width` and `height`.
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### BrowserWindow.getMinimumSize()
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Returns an array that contains window's minimum width and height.
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### BrowserWindow.setMaximumSize(width, height)
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* `width` Integer
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* `height` Integer
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Sets the maximum size of window to `width` and `height`.
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### BrowserWindow.getMaximumSize()
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Returns an array that contains window's maximum width and height.
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### BrowserWindow.setResizable(resizable)
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* `resizable` Boolean
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Sets whether the window can be manually resized by user.
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### BrowserWindow.isResizable()
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Returns whether the window can be manually resized by user.
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### BrowserWindow.setAlwaysOnTop(flag)
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* `flag` Boolean
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Sets whether the window should show always on top of other windows. After
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setting this, the window is still a normal window, not a toolbox window which
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can not be focused on.
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### BrowserWindow.isAlwaysOnTop()
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Returns whether the window is always on top of other windows.
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### BrowserWindow.center()
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Moves window to the center of the screen.
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### BrowserWindow.setPosition(x, y)
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* `x` Integer
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* `y` Integer
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Moves window to `x` and `y`.
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### BrowserWindow.getPosition()
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Returns an array that contains window's current position.
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### BrowserWindow.setTitle(title)
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* `title` String
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Changes the title of native window to `title`.
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### BrowserWindow.getTitle()
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Returns the title of the native window.
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**Note:** The title of web page can be different from the title of the native
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window.
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### BrowserWindow.flashFrame(flag)
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* `flag` Boolean
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Starts or stops flashing the window to attract user's attention.
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### BrowserWindow.setSkipTaskbar(skip)
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* `skip` Boolean
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Makes the window do not show in taskbar.
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### BrowserWindow.setKiosk(flag)
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* `flag` Boolean
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Enters or leaves the kiosk mode.
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### BrowserWindow.isKiosk()
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Returns whether the window is in kiosk mode.
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### BrowserWindow.setRepresentedFilename(filename)
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* `filename` String
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Sets the pathname of the file the window represents, and the icon of the file
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will show in window's title bar.
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__Note__: This API is available only on OS X.
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### BrowserWindow.getRepresentedFilename()
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Returns the pathname of the file the window represents.
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__Note__: This API is available only on OS X.
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### BrowserWindow.setDocumentEdited(edited)
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* `edited` Boolean
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Specifies whether the window’s document has been edited, and the icon in title
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bar will become grey when set to `true`.
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__Note__: This API is available only on OS X.
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### BrowserWindow.IsDocumentEdited()
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Whether the window's document has been edited.
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__Note__: This API is available only on OS X.
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### BrowserWindow.openDevTools()
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Opens the developer tools.
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### BrowserWindow.closeDevTools()
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Closes the developer tools.
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### BrowserWindow.toggleDevTools()
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Toggle the developer tools.
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### BrowserWindow.inspectElement(x, y)
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* `x` Integer
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* `y` Integer
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Starts inspecting element at position (`x`, `y`).
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### BrowserWindow.focusOnWebView()
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### BrowserWindow.blurWebView()
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### BrowserWindow.capturePage([rect, ]callback)
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* `rect` Object - The area of page to be captured
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* `x` Integer
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* `y` Integer
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* `width` Integer
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* `height` Integer
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* `callback` Function
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Captures the snapshot of page within `rect`, upon completion `callback` would be
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called with `callback(image)`, the `image` is a `Buffer` that stores the PNG
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encoded data of the snapshot. Omitting the `rect` would capture the whole
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visible page.
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You can write received `image` directly to a `.png` file, or you can base64
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encode it and use data URL to embed the image in HTML.
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**Note:** Be sure to read documents on remote buffer in
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[remote](remote.md) if you are going to use this API in renderer
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process.
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### BrowserWindow.print([options])
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* `options` Object
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* `silent` Boolean - Don't ask user for print settings, defaults to `false`
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* `printBackground` Boolean - Also prints the background color and image of
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the web page, defaults to `false`.
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Prints window's web page. When `silent` is set to `false`, atom-shell will pick
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up system's default printer and default settings for printing.
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Calling `window.print()` in web page is equivalent to call
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`BrowserWindow.print({silent: false, printBackground: false})`.
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### BrowserWindow.loadUrl(url)
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Same with `webContents.loadUrl(url)`.
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### BrowserWindow.reload()
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Same with `webContents.reload`.
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### BrowserWindow.setMenu(menu)
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* `menu` Menu
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Sets the `menu` as the window top menu.
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__Note:__ This API is not available on OS X.
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### BrowserWindow.setProgressBar(progress)
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* `progress` Double
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Sets progress value in progress bar. Valid range is [0, 1.0].
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Remove progress bar when progress < 0;
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Change to indeterminate mode when progress > 1.
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On Linux platform, only supports Unity desktop environment, you need to specify
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the `*.desktop` file name to `desktopName` field in `package.json`. By default,
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it will assume `app.getName().desktop`.
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### BrowserWindow.setOverlayIcon(overlay, description)
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* `overlay` [Image](image.md) - the icon to display on the bottom right corner of the Taskbar icon. If this parameter is `null`, the overlay is cleared.
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* `description` String - a description that will be provided to Accessibility screenreaders
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Sets a 16px overlay onto the current Taskbar icon, usually used to convey some sort of application status or to passively notify the user.
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__Note:__ This API is only available on Windows, Win7 or above
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### BrowserWindow.showDefinitionForSelection()
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Shows pop-up dictionary that searches the selected word on the page.
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__Note__: This API is available only on OS X.
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### BrowserWindow.setAutoHideMenuBar(hide)
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* `hide` Boolean
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Sets whether the window menu bar should hide itself automatically. Once set the
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menu bar will only show when users press the single `Alt` key.
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If the menu bar is already visible, calling `setAutoHideMenuBar(true)` won't
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hide it immediately.
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### BrowserWindow.isMenuBarAutoHide()
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Returns whether menu bar automatically hides itself.
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### BrowserWindow.setMenuBarVisibility(visible)
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* `visible` Boolean
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Sets whether the menu bar should be visible. If the menu bar is auto-hide, users
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can still bring up the menu bar by pressing the single `Alt` key.
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### BrowserWindow.isMenuBarVisible()
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Returns whether the menu bar is visible.
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## Class: WebContents
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A `WebContents` is responsible for rendering and controlling a web page.
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`WebContents` is an
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[EventEmitter](http://nodejs.org/api/events.html#events_class_events_eventemitter).
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### Event: 'did-finish-load'
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Emitted when the navigation is done, i.e. the spinner of the tab will stop
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spinning, and the `onload` event was dispatched.
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### Event: 'did-fail-load'
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* `event` Event
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||
* `errorCode` Integer
|
||
* `errorDescription` String
|
||
|
||
This event is like `did-finish-load`, but emitted when the load failed or was
|
||
cancelled, e.g. `window.stop()` is invoked.
|
||
|
||
### Event: 'did-frame-finish-load'
|
||
|
||
* `event` Event
|
||
* `isMainFrame` Boolean
|
||
|
||
Emitted when a frame has done navigation.
|
||
|
||
### Event: 'did-start-loading'
|
||
|
||
Corresponds to the points in time when the spinner of the tab starts spinning.
|
||
|
||
### Event: 'did-stop-loading'
|
||
|
||
Corresponds to the points in time when the spinner of the tab stops spinning.
|
||
|
||
### Event: 'did-get-redirect-request'
|
||
|
||
* `event` Event
|
||
* `oldUrl` String
|
||
* `newUrl` String
|
||
* `isMainFrame` Boolean
|
||
|
||
Emitted when a redirect was received while requesting a resource.
|
||
|
||
### Event: 'new-window'
|
||
|
||
* `event` Event
|
||
* `url` String
|
||
* `frameName` String
|
||
* `disposition` String - Can be `default`, `foreground-tab`, `background-tab`,
|
||
`new-window` and `other`
|
||
|
||
Emitted when the page requested to open a new window for `url`. It could be
|
||
requested by `window.open` or an external link like `<a target='_blank'>`.
|
||
|
||
By default a new `BrowserWindow` will be created for the `url`, and a proxy
|
||
will be returned to `window.open` to let you have limited control of it.
|
||
|
||
Calling `event.preventDefault()` can prevent creating new windows.
|
||
|
||
### Event: 'will-navigate'
|
||
|
||
* `event` Event
|
||
* `url` String
|
||
|
||
Emitted when user or the page wants to start an navigation, it can happen when
|
||
`window.location` object is changed or user clicks a link in the page.
|
||
|
||
This event will not emit when the navigation is started programmely with APIs
|
||
like `WebContents.loadUrl` and `WebContents.back`.
|
||
|
||
Calling `event.preventDefault()` can prevent the navigation.
|
||
|
||
### Event: 'crashed'
|
||
|
||
Emitted when the renderer process is crashed.
|
||
|
||
### Event: 'destroyed'
|
||
|
||
Emitted when the WebContents is destroyed.
|
||
|
||
### WebContents.loadUrl(url)
|
||
|
||
* `url` URL
|
||
|
||
Loads the `url` in the window, the `url` must contains the protocol prefix,
|
||
e.g. the `http://` or `file://`.
|
||
|
||
### WebContents.getUrl()
|
||
|
||
Returns URL of current web page.
|
||
|
||
### WebContents.getTitle()
|
||
|
||
Returns the title of web page.
|
||
|
||
### WebContents.isLoading()
|
||
|
||
Returns whether web page is still loading resources.
|
||
|
||
### WebContents.isWaitingForResponse()
|
||
|
||
Returns whether web page is waiting for a first-response for the main resource
|
||
of the page.
|
||
|
||
### WebContents.stop()
|
||
|
||
Stops any pending navigation.
|
||
|
||
### WebContents.reload()
|
||
|
||
Reloads current page.
|
||
|
||
### WebContents.reloadIgnoringCache()
|
||
|
||
Reloads current page and ignores cache.
|
||
|
||
### WebContents.canGoBack()
|
||
|
||
Returns whether the web page can go back.
|
||
|
||
### WebContents.canGoForward()
|
||
|
||
Returns whether the web page can go forward.
|
||
|
||
### WebContents.canGoToOffset(offset)
|
||
|
||
* `offset` Integer
|
||
|
||
Returns whether the web page can go to `offset`.
|
||
|
||
### WebContents.goBack()
|
||
|
||
Makes the web page go back.
|
||
|
||
### WebContents.goForward()
|
||
|
||
Makes the web page go forward.
|
||
|
||
### WebContents.goToIndex(index)
|
||
|
||
* `index` Integer
|
||
|
||
Navigates to the specified absolute index.
|
||
|
||
### WebContents.goToOffset(offset)
|
||
|
||
* `offset` Integer
|
||
|
||
Navigates to the specified offset from the "current entry".
|
||
|
||
### WebContents.isCrashed()
|
||
|
||
Whether the renderer process has crashed.
|
||
|
||
### WebContents.setUserAgent(userAgent)
|
||
|
||
* `userAgent` String
|
||
|
||
Overrides the user agent for this page.
|
||
|
||
### WebContents.insertCSS(css)
|
||
|
||
* `css` String
|
||
|
||
Injects CSS into this page.
|
||
|
||
### WebContents.executeJavaScript(code)
|
||
|
||
* `code` String
|
||
|
||
Evaluates `code` in page.
|
||
|
||
### WebContents.undo()
|
||
|
||
Executes editing command `undo` in page.
|
||
|
||
### WebContents.redo()
|
||
|
||
Executes editing command `redo` in page.
|
||
|
||
### WebContents.cut()
|
||
|
||
Executes editing command `cut` in page.
|
||
|
||
### WebContents.copy()
|
||
|
||
Executes editing command `copy` in page.
|
||
|
||
### WebContents.paste()
|
||
|
||
Executes editing command `paste` in page.
|
||
|
||
### WebContents.delete()
|
||
|
||
Executes editing command `delete` in page.
|
||
|
||
### WebContents.selectAll()
|
||
|
||
Executes editing command `selectAll` in page.
|
||
|
||
### WebContents.unselect()
|
||
|
||
Executes editing command `unselect` in page.
|
||
|
||
### WebContents.replace(text)
|
||
|
||
* `text` String
|
||
|
||
Executes editing command `replace` in page.
|
||
|
||
### WebContents.replaceMisspelling(text)
|
||
|
||
* `text` String
|
||
|
||
Executes editing command `replaceMisspelling` in page.
|
||
|
||
### WebContents.send(channel[, args...])
|
||
|
||
* `channel` String
|
||
|
||
Send `args..` to the web page via `channel` in asynchronous message, the web
|
||
page can handle it by listening to the `channel` event of `ipc` module.
|
||
|
||
An example of sending messages from browser side to web pages:
|
||
|
||
```javascript
|
||
// On browser side.
|
||
var window = null;
|
||
app.on('ready', function() {
|
||
window = new BrowserWindow({width: 800, height: 600});
|
||
window.loadUrl('file://' + __dirname + '/index.html');
|
||
window.webContents.on('did-finish-load', function() {
|
||
window.webContents.send('ping', 'whoooooooh!');
|
||
});
|
||
});
|
||
```
|
||
|
||
```html
|
||
// index.html
|
||
<html>
|
||
<body>
|
||
<script>
|
||
require('ipc').on('ping', function(message) {
|
||
console.log(message); // Prints "whoooooooh!"
|
||
});
|
||
</script>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
**Note:**
|
||
|
||
1. The IPC message handler in web pages do not have a `event` parameter, which
|
||
is different from the handlers on browser side.
|
||
2. There is no way to send synchronous messages from browser side to web pages,
|
||
because it would be very easy to cause dead locks.
|