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Add new CanZoom/Zoom API (fixes #3284)

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Add a simpler CanZoom/Zoom API as an alternative to the more error-prone
SetZoomLevel/GetZoomLevel API. Both APIs are now implemented for both runtimes.
With the Chrome runtime a zoom notification bubble will be displayed unless
CefBrowserSettings.chrome_zoom_bubble is set to STATE_DISABLED.

To test:
- Run cefclient and select zoom entries from the Tests menu.
- chrome: Run cefclient with `--hide-chrome-bubbles` command-line flag to hide
  the zoom notification bubble.
This commit is contained in:
Marshall Greenblatt
2023-10-04 19:46:45 -04:00
parent d8ea7363f5
commit 29938f9cb0
20 changed files with 338 additions and 80 deletions
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33
include/cef_browser.h
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@@ -396,17 +396,40 @@ class CefBrowserHost : public virtual CefBaseRefCounted {
virtual CefRefPtr<CefRequestContext> GetRequestContext() = 0;
///
/// Get the current zoom level. The default zoom level is 0.0. This method can
/// only be called on the UI thread.
/// Returns true if this browser can execute the specified zoom command. This
/// method can only be called on the UI thread.
///
/*--cef()--*/
virtual bool CanZoom(cef_zoom_command_t command) = 0;
///
/// Execute a zoom command in this browser. If called on the UI thread the
/// change will be applied immediately. Otherwise, the change will be applied
/// asynchronously on the UI thread.
///
/*--cef()--*/
virtual void Zoom(cef_zoom_command_t command) = 0;
///
/// Get the default zoom level. This value will be 0.0 by default but can be
/// configured with the Chrome runtime. This method can only be called on the
/// UI thread.
///
/*--cef()--*/
virtual double GetDefaultZoomLevel() = 0;
///
/// Get the current zoom level. This method can only be called on the UI
/// thread.
///
/*--cef()--*/
virtual double GetZoomLevel() = 0;
///
/// 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.
/// zoom level to the default. If called on the UI thread the change will be
/// applied immediately. Otherwise, the change will be applied asynchronously
/// on the UI thread.
///
/*--cef()--*/
virtual void SetZoomLevel(double zoomLevel) = 0;