Add multi-touch support for OSR (issue #1059)

include/internal/cef_types.h

@@ -1696,6 +1696,74 @@ typedef struct _cef_mouse_event_t {
   uint32 modifiers;
 } cef_mouse_event_t;
 
+///
+// Touch points states types.
+///
+typedef enum {
+  CEF_TET_RELEASED = 0,
+  CEF_TET_PRESSED,
+  CEF_TET_MOVED,
+  CEF_TET_CANCELLED
+} cef_touch_event_type_t;
+
+///
+// Structure representing touch event information.
+///
+typedef struct _cef_touch_event_t {
+  ///
+  // Id of a touch point. Must be unique per touch, can be any number except -1.
+  // Note that a maximum of 16 concurrent touches will be tracked; touches
+  // beyond that will be ignored.
+  ///
+  int id;
+
+  ///
+  // X coordinate relative to the left side of the view.
+  ///
+  float x;
+
+  ///
+  // Y coordinate relative to the top side of the view.
+  ///
+  float y;
+
+  ///
+  // X radius in pixels. Set to 0 if not applicable.
+  ///
+  float radius_x;
+
+  ///
+  // Y radius in pixels. Set to 0 if not applicable.
+  ///
+  float radius_y;
+
+  ///
+  // Rotation angle in radians. Set to 0 if not applicable.
+  ///
+  float rotation_angle;
+
+  ///
+  // The normalized pressure of the pointer input in the range of [0,1].
+  // Set to 0 if not applicable.
+  ///
+  float pressure;
+
+  ///
+  // The state of the touch point. Touches begin with one CEF_TET_PRESSED event
+  // followed by zero or more CEF_TET_MOVED events and finally one
+  // CEF_TET_RELEASED or CEF_TET_CANCELLED event. Events not respecting this
+  // order will be ignored.
+  ///
+  cef_touch_event_type_t type;
+
+  ///
+  // Bit flags describing any pressed modifier keys. See
+  // cef_event_flags_t for values.
+  ///
+  uint32 modifiers;
+
+} cef_touch_event_t;
+
 ///
 // Paint element types.
 ///

include/internal/cef_types_wrappers.h

@@ -481,6 +481,25 @@ struct CefMouseEventTraits {
 ///
 typedef CefStructBase<CefMouseEventTraits> CefMouseEvent;
 
+struct CefTouchEventTraits {
+  typedef cef_touch_event_t struct_type;
+
+  static inline void init(struct_type* s) {}
+
+  static inline void clear(struct_type* s) {}
+
+  static inline void set(const struct_type* src,
+                         struct_type* target,
+                         bool copy) {
+    *target = *src;
+  }
+};
+
+///
+// Class representing a touch event.
+///
+typedef CefStructBase<CefTouchEventTraits> CefTouchEvent;
+
 struct CefPopupFeaturesTraits {
   typedef cef_popup_features_t struct_type;