CefBrowserHost - nomi-san/luacef GitHub Wiki

CefBrowserHost

Functions

CreateBrowser(<CefWindowInfo> windowInfo,
    <CefClient> client,
    <str> url,
    <CefBrowserSettings> settings,
    <CefRequestContext> request_context) -> <bool>
  • Create a new browser window using the window parameters specified by windowInfo. All values will be copied internally and the actual window will be created on the UI thread. If request_context is empty the global request context will be used. This method can be called on any browser process thread and will not block.
CreateBrowserSync(
    <CefWindowInfo> windowInfo,
    <CefClient> client,
    <str> url,
    <CefBrowserSettings> settings,
    <CefRequestContext> request_context) -> <CefBrowser>
  • Create a new browser window using the window parameters specified by windowInfo. If request_context is empty the global request context will be used. This method can only be called on the browser process UI thread.

Methods

GetBrowser() -> <CefBrowser>

  • Returns the hosted browser object.

CloseBrowser(<bool> force_close)

  • Request that the browser close. The JavaScript 'onbeforeunload' event will be fired. If |force_close| is false the event handler, if any, will be allowed to prompt the user and the user can optionally cancel the close. If |force_close| is true the prompt will not be displayed and the close will proceed. Results in a call to CefLifeSpanHandler::DoClose() if the event handler allows the close or if |force_close| is true. See CefLifeSpanHandler::DoClose() documentation for additional usage information.

TryCloseBrowser() -> <bool>

  • Helper for closing a browser. Call this method from the top-level window close handler. Internally this calls CloseBrowser(false) if the close has not yet been initiated. This method returns false while the close is pending and true after the close has completed. See CloseBrowser() and CefLifeSpanHandler::DoClose() documentation for additional usage information. This method must be called on the browser process UI thread.

SetFocus(<bool> focus);

  • Set whether the browser is focused.

GetWindowHandle() -> <CefWindowHandle>

  • Retrieve the window handle for this browser. If this browser is wrapped in a CefBrowserView this method should be called on the browser process UI thread and it will return the handle for the top-level native window.

GetOpenerWindowHandle() -> <CefWindowHandle>

  • Retrieve the window handle of the browser that opened this browser. Will return NULL for non-popup windows or if this browser is wrapped in a CefBrowserView. This method can be used in combination with custom handling of modal windows.

HasView() -> <bool>

  • Returns true if this browser is wrapped in a CefBrowserView.

GetClient() -> <CefClient>

  • Returns the client for this browser.

GetRequestContext() -> <CefRequestContext>

  • Returns the request context for this browser.

GetZoomLevel() -> <num>

  • Get the current zoom level. The default zoom level is 0.0.
  • This method can only be called on the UI thread.

SetZoomLevel(<num> zoomLevel)

  • Change the zoom level to the specified value. Specify 0.0 to reset the zoom level. If called on the UI thread the change will be applied immediately. Otherwise, the change will be applied asynchronously on the UI thread.

RunFileDialog(<FileDialogMode|int> mode, <str>title, <str> default_file_path, <str[]> accept_filters, <int> selected_accept_filter, <CefRunFileDialogCallback> callback)

  • Call to run a file chooser dialog. Only a single file chooser dialog may be pending at any given time. |mode| represents the type of dialog to display. |title| to the title to be used for the dialog and may be empty to show the default title ("Open" or "Save" depending on the mode). |default_file_path| is the path with optional directory and/or file name component that will be initially selected in the dialog. |accept_filters| are used to restrict the selectable file types and may any combination of (a) valid lower-cased MIME types (e.g. "text/" or "image/"), (b) individual file extensions (e.g. ".txt" or ".png"), or (c) combined description and file extension delimited using "|" and ";" (e.g. "Image Types|.png;.gif;.jpg"). |selected_accept_filter| is the 0-based index of the filter that will be selected by default. |callback| will be executed after the dialog is dismissed or immediately if another dialog is already pending. The dialog will be initiated asynchronously on the UI thread.

virtual void StartDownload(<str> url);

  • Download the file at url using CefDownloadHandler.

DownloadImage(<CefString> image_url, <bool> is_favicon, <uint> max_image_size, <bool> bypass_cache, <CefDownloadImageCallback> callback)

  • Download |image_url| and execute |callback| on completion with the images received from the renderer. If |is_favicon| is true then cookies are not sent and not accepted during download. Images with density independent pixel (DIP) sizes larger than |max_image_size| are filtered out from the image results. Versions of the image at different scale factors may be downloaded up to the maximum scale factor supported by the system. If there are no image results <= |max_image_size| then the smallest image is resized to |max_image_size| and is the only result. A |max_image_size| of 0 means unlimited. If |bypass_cache| is true then |image_url| is requested from the server even if it is present in the browser cache.

Print()

  • Print the current browser contents.

PrintToPDF(<CefString> path, <CefPdfPrintSettings> settings, <CefPdfPrintCallback> callback)

  • Print the current browser contents to the PDF file specified by |path| and execute |callback| on completion. The caller is responsible for deleting |path| when done. For PDF printing to work on Linux you must implement the CefPrintHandler::GetPdfPaperSize method.

Find(<int> identifier, <CefString> searchText, <bool> forward, <bool> matchCase, <bool> findNext)

  • Search for searchText. identifier must be a unique ID and these IDs must strictly increase so that newer requests always have greater IDs than older requests. If |identifier| is zero or less than the previous ID value then it will be automatically assigned a new valid ID. |forward| indicates whether to search forward or backward within the page. |matchCase| indicates whether the search should be case-sensitive. |findNext| indicates whether this is the first request or a follow-up. The CefFindHandler instance, if any, returned via CefClient::GetFindHandler will be called to report find results.

StopFinding(<bool> clearSelection)

  • Cancel all searches that are currently going on.

ShowDevTools(<CefWindowInfo> windowInfo, <CefClient> client, <CefBrowserSettings> settings, <CefPoint> inspect_element_at)

  • Open developer tools (DevTools) in its own browser. The DevTools browser will remain associated with this browser. If the DevTools browser is already open then it will be focused, in which case the |windowInfo|, |client| and |settings| parameters will be ignored. If |inspect_element_at| is non-empty then the element at the specified (x,y) location will be inspected. The |windowInfo| parameter will be ignored if this browser is wrapped in a CefBrowserView.

CloseDevTools()

  • Explicitly close the associated DevTools browser, if any.

HasDevTools() -> <bool>

  • Returns true if this browser currently has an associated DevTools browser. Must be called on the browser process UI thread.

GetNavigationEntries(<CefNavigationEntryVisitor> visitor, <bool> current_only)

  • Retrieve a snapshot of current navigation entries as values sent to the specified visitor. If |current_only| is true only the current navigation entry will be sent, otherwise all navigation entries will be sent.

SetMouseCursorChangeDisabled(<bool> disabled)

  • Set whether mouse cursor change is disabled.

IsMouseCursorChangeDisabled() -> <bool>

  • Returns true if mouse cursor change is disabled.

ReplaceMisspelling(<str> word)

  • If a misspelled word is currently selected in an editable node calling this method will replace it with the specified word.

AddWordToDictionary(<str> word)

  • Add the specified word to the spelling dictionary.

IsWindowRenderingDisabled() -> <bool>

  • Returns true if window rendering is disabled.

WasResized();

  • Notify the browser that the widget has been resized. The browser will first call CefRenderHandler::GetViewRect to get the new size and then call CefRenderHandler::OnPaint asynchronously with the updated regions. This method is only used when window rendering is disabled.

WasHidden(<bool> hidden)

  • Notify the browser that it has been hidden or shown. Layouting and CefRenderHandler::OnPaint notification will stop when the browser is hidden. This method is only used when window rendering is disabled.

NotifyScreenInfoChanged()

  • Send a notification to the browser that the screen info has changed. The browser will then call CefRenderHandler::GetScreenInfo to update the screen information with the new values. This simulates moving the webview window from one display to another, or changing the properties of the current display. This method is only used when window rendering is disabled.

Invalidate(PaintElementType type)

  • Invalidate the view. The browser will call CefRenderHandler::OnPaint asynchronously. This method is only used when window rendering is disabled.

SendExternalBeginFrame()

  • Issue a BeginFrame request to Chromium. Only valid when CefWindowInfo::external_begin_frame_enabled is set to true.

`SendKeyEvent( event);

  • Send a key event to the browser.

`SendMouseClickEvent( event, <MouseButtonType|int> type, mouseUp, clickCount);

  • Send a mouse click event to the browser. The |x| and |y| coordinates are relative to the upper-left corner of the view.

SendMouseMoveEvent(<CefMouseEvent> event, <bool> mouseleave)

  • Send a mouse move event to the browser. The |x| and |y| coordinates are relative to the upper-left corner of the view.

SendMouseWheelEvent(<CefMouseEvent> event, <int> deltaX, <int> deltaY)

  • Send a mouse wheel event to the browser. The |x| and |y| coordinates are relative to the upper-left corner of the view. The |deltaX| and |deltaY| values represent the movement delta in the X and Y directions respectively. In order to scroll inside select popups with window rendering disabled CefRenderHandler::GetScreenPoint should be implemented properly.

SendTouchEvent(<CefTouchEvent> event)

  • Send a touch event to the browser for a windowless browser.

SendFocusEvent(<bool> setFocus)

  • Send a focus event to the browser.

SendCaptureLostEvent()

  • Send a capture lost event to the browser.

NotifyMoveOrResizeStarted()

  • Notify the browser that the window hosting it is about to be moved or resized. This method is only used on Windows and Linux.

GetWindowlessFrameRate() -> <int>

  • Returns the maximum rate in frames per second (fps) that CefRenderHandler:: OnPaint will be called for a windowless browser. The actual fps may be lower if the browser cannot generate frames at the requested rate. The minimum value is 1 and the maximum value is 60 (default 30). This method can only be called on the UI thread.

SetWindowlessFrameRate(<int> frame_rate)

  • Set the maximum rate in frames per second (fps) that CefRenderHandler:: OnPaint will be called for a windowless browser. The actual fps may be lower if the browser cannot generate frames at the requested rate. The minimum value is 1 and the maximum value is 60 (default 30). Can also be set at browser creation via CefBrowserSettings.windowless_frame_rate.

ImeSetComposition(<CefString> text, <CefCompositionUnderline[]> underlines, <CefRange> replacement_range, <CefRange> selection_range)

  • Begins a new composition or updates the existing composition. Blink has a special node (a composition node) that allows the input method to change text without affecting other DOM nodes. |text| is the optional text that will be inserted into the composition node. |underlines| is an optional set of ranges that will be underlined in the resulting text. |replacement_range| is an optional range of the existing text that will be replaced. |selection_range| is an optional range of the resulting text that will be selected after insertion or replacement. The |replacement_range| value is only used on OS X.
  • This method may be called multiple times as the composition changes. When the client is done making changes the composition should either be canceled or completed. To cancel the composition call ImeCancelComposition. To complete the composition call either ImeCommitText or ImeFinishComposingText. Completion is usually signaled when:
    • A. The client receives a WM_IME_COMPOSITION message with a GCS_RESULTSTR flag (on Windows), or;
    • B. The client receives a "commit" signal of GtkIMContext (on Linux), or;
    • C. insertText of NSTextInput is called (on Mac).
  • This method is only used when window rendering is disabled.

ImeCommitText(<str> text, <CefRange> replacement_range, <int> relative_cursor_pos)

  • Completes the existing composition by optionally inserting the specified |text| into the composition node. |replacement_range| is an optional range of the existing text that will be replaced. |relative_cursor_pos| is where the cursor will be positioned relative to the current cursor position. See comments on ImeSetComposition for usage. The |replacement_range| and |relative_cursor_pos| values are only used on OS X. This method is only used when window rendering is disabled.

ImeFinishComposingText(<bool> keep_selection)

  • Completes the existing composition by applying the current composition node contents. If |keep_selection| is false the current selection, if any, will be discarded. See comments on ImeSetComposition for usage. This method is only used when window rendering is disabled.

ImeCancelComposition()

  • Cancels the existing composition and discards the composition node contents without applying them. See comments on ImeSetComposition for usage.
  • This method is only used when window rendering is disabled.

DragTargetDragEnter(<CefDragData> drag_data, <CefMouseEvent> event, <DragOperationsMask|int> allowed_ops)

  • Call this method when the user drags the mouse into the web view (before calling DragTargetDragOver/DragTargetLeave/DragTargetDrop). |drag_data| should not contain file contents as this type of data is not allowed to be dragged into the web view. File contents can be removed using CefDragData::ResetFileContents (for example, if |drag_data| comes from CefRenderHandler::StartDragging).
  • This method is only used when window rendering is disabled.

DragTargetDragOver(<CefMouseEvent> event, <DragOperationsMask|int> allowed_ops)

  • Call this method each time the mouse is moved across the web view during a drag operation (after calling DragTargetDragEnter and before calling DragTargetDragLeave/DragTargetDrop).
  • This method is only used when window rendering is disabled.

DragTargetDragLeave()

  • Call this method when the user drags the mouse out of the web view (after calling DragTargetDragEnter).
  • This method is only used when window rendering is disabled.

DragTargetDrop(<CefMouseEvent> event)

  • Call this method when the user completes the drag operation by dropping the object onto the web view (after calling DragTargetDragEnter). The object being dropped is |drag_data|, given as an argument to the previous DragTargetDragEnter call.
  • This method is only used when window rendering is disabled.

DragSourceEndedAt(int x, int y, <DragOperationsMask|int> op)

  • Call this method when the drag operation started by a CefRenderHandler::StartDragging call has ended either in a drop or by being cancelled. |x| and |y| are mouse coordinates relative to the upper-left corner of the view. If the web view is both the drag source and the drag target then all DragTarget* methods should be called before DragSource* mthods.
  • This method is only used when window rendering is disabled.

DragSourceSystemDragEnded()

  • Call this method when the drag operation started by a CefRenderHandler::StartDragging call has completed. This method may be called immediately without first calling DragSourceEndedAt to cancel a drag operation. If the web view is both the drag source and the drag target then all DragTarget* methods should be called before DragSource* mthods.
  • This method is only used when window rendering is disabled.

GetVisibleNavigationEntry() -> <CefNavigationEntry>

  • Returns the current visible navigation entry for this browser. This method can only be called on the UI thread.

SetAccessibilityState(<CefState|int> accessibility_state) Set accessibility state for all frames. |accessibility_state| may be default, enabled or disabled. If |accessibility_state| is STATE_DEFAULT then accessibility will be disabled by default and the state may be further controlled with the "force-renderer-accessibility" and "disable-renderer-accessibility" command-line switches. If |accessibility_state| is STATE_ENABLED then accessibility will be enabled. If |accessibility_state| is STATE_DISABLED then accessibility will be completely disabled.

  • For windowed browsers accessibility will be enabled in Complete mode (which corresponds to kAccessibilityModeComplete in Chromium). In this mode all platform accessibility objects will be created and managed by Chromium's internal implementation. The client needs only to detect the screen reader and call this method appropriately. For example, on macOS the client can handle the @"AXEnhancedUserInterface" accessibility attribute to detect VoiceOver state changes and on Windows the client can handle WM_GETOBJECT with OBJID_CLIENT to detect accessibility readers.
  • For windowless browsers accessibility will be enabled in TreeOnly mode (which corresponds to kAccessibilityModeWebContentsOnly in Chromium). In this mode renderer accessibility is enabled, the full tree is computed, and events are passed to CefAccessibiltyHandler, but platform accessibility objects are not created. The client may implement platform accessibility objects using CefAccessibiltyHandler callbacks if desired.

SetAutoResizeEnabled(<bool> enabled, <CefSize> min_size, <CefSize> max_size)

  • Enable notifications of auto resize via CefDisplayHandler::OnAutoResize. Notifications are disabled by default. min_size and max_size define the range of allowed sizes.

GetExtension() -> <CefExtension>

  • Returns the extension hosted in this browser or NULL if no extension is hosted. See CefRequestContext::LoadExtension for details.

IsBackgroundHost() -> <bool>

  • Returns true if this browser is hosting an extension background script. Background hosts do not have a window and are not displayable. See CefRequestContext::LoadExtension for details.

SetAudioMuted(<bool> mute)

  • Set whether the browser's audio is muted.

IsAudioMuted() -> <bool>

  • Returns true if the browser's audio is muted. This method can only be called on the UI thread.
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