Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/test/event_generator.h

Index: ui/events/test/event_generator.h
diff --git a/ui/events/test/event_generator.h b/ui/events/test/event_generator.h
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+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_EVENTS_TEST_EVENT_GENERATOR_H_
+#define UI_EVENTS_TEST_EVENT_GENERATOR_H_
+
+#include <list>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
+#include "ui/events/event_constants.h"
+#include "ui/events/keycodes/keyboard_codes.h"
+#include "ui/gfx/geometry/point.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace base {
+class TickClock;
+}
+
+namespace ui {
+class Event;
+class EventProcessor;
+class EventSource;
+class EventTarget;
+class KeyEvent;
+class MouseEvent;
+class ScrollEvent;
+class TouchEvent;
+
+namespace test {
+
+typedef base::Callback<void(EventType, const gfx::Vector2dF&)>
+        ScrollStepCallback;
+
+class EventGenerator;
+
+// A delegate interface for EventGenerator to abstract platform-specific event
+// targeting and coordinate conversion.
+class EventGeneratorDelegate {
+ public:
+  virtual ~EventGeneratorDelegate() {}
+
+  // Set the context of the delegate, whilst it is being used by an active
+  // EventGenerator.
+  virtual void SetContext(EventGenerator* owner,
+                          gfx::NativeWindow root_window,
+                          gfx::NativeWindow window) {}
+
+  // The ui::EventTarget at the given |location|.
+  virtual EventTarget* GetTargetAt(const gfx::Point& location) = 0;
+
+  // The ui::EventSource for the given |target|.
+  virtual EventSource* GetEventSource(EventTarget* target) = 0;
+
+  // Helper functions to determine the center point of |target| or |window|.
+  virtual gfx::Point CenterOfTarget(const EventTarget* target) const = 0;
+  virtual gfx::Point CenterOfWindow(gfx::NativeWindow window) const = 0;
+
+  // Convert a point between API's coordinates and |target|'s coordinates.
+  virtual void ConvertPointFromTarget(const EventTarget* target,
+                                      gfx::Point* point) const = 0;
+  virtual void ConvertPointToTarget(const EventTarget* target,
+                                    gfx::Point* point) const = 0;
+
+  // Convert a point from the coordinate system in the host that contains
+  // |hosted_target| into the root window's coordinate system.
+  virtual void ConvertPointFromHost(const EventTarget* hosted_target,
+                                    gfx::Point* point) const = 0;
+};
+
+// ui::test::EventGenerator is a tool that generates and dispatches events.
+// Unlike |ui_controls| package in ui/base/test, this does not use platform
+// native message loops. Instead, it sends events to the event dispatcher
+// synchronously.
+//
+// This class is not suited for the following cases:
+//
+// 1) If your test depends on native events (ui::Event::native_event()).
+//   This return is empty/NULL event with EventGenerator.
+// 2) If your test involves nested message loop, such as
+//    menu or drag & drop. Because this class directly
+//    post an event to WindowEventDispatcher, this event will not be
+//    handled in the nested message loop.
+// 3) Similarly, |base::MessagePumpObserver| will not be invoked.
+// 4) Any other code that requires native message loops, such as
+//    tests for WindowTreeHostWin/WindowTreeHostX11.
+//
+// If one of these applies to your test, please use |ui_controls|
+// package instead.
+//
+// Note: The coordinates of the points in API is determined by the
+// EventGeneratorDelegate.
+class EventGenerator {
+ public:
+  // Creates an EventGenerator with the mouse/touch location (0,0),
+  // which uses the |root_window|'s coordinates and the default delegate for
+  // this platform.
+  explicit EventGenerator(gfx::NativeWindow root_window);
+
+  // Create an EventGenerator with EventGeneratorDelegate,
+  // which uses the coordinates conversions and targeting provided by
+  // |delegate|.
+  explicit EventGenerator(EventGeneratorDelegate* delegate);
+
+  // Creates an EventGenerator with the mouse/touch location
+  // at |initial_location|, which uses the |root_window|'s coordinates.
+  EventGenerator(gfx::NativeWindow root_window,
+                 const gfx::Point& initial_location);
+
+  // Creates an EventGenerator with the mouse/touch location centered over
+  // |window|. This is currently the only constructor that works on Mac, since
+  // a specific window is required (and there is no root window).
+  EventGenerator(gfx::NativeWindow root_window, gfx::NativeWindow window);
+
+  virtual ~EventGenerator();
+
+  // Explicitly sets the location used by mouse/touch events. This is set by the
+  // various methods that take a location but can be manipulated directly,
+  // typically for touch.
+  void set_current_location(const gfx::Point& location) {
+    current_location_ = location;
+  }
+  const gfx::Point& current_location() const { return current_location_; }
+
+  void set_async(bool async) { async_ = async; }
+  bool async() const { return async_; }
+
+  // Dispatch events through the application instead of directly to the
+  // target window. Currently only supported on Mac.
+  void set_targeting_application(bool targeting_application) {
+    targeting_application_ = targeting_application;
+  }
+  bool targeting_application() const { return targeting_application_; }
+
+  // Resets the event flags bitmask.
+  void set_flags(int flags) { flags_ = flags; }
+  int flags() const { return flags_; }
+
+  // Generates a left button press event.
+  void PressLeftButton();
+
+  // Generates a left button release event.
+  void ReleaseLeftButton();
+
+  // Generates events to click (press, release) left button.
+  void ClickLeftButton();
+
+  // Generates a double click event using the left button.
+  void DoubleClickLeftButton();
+
+  // Generates a right button press event.
+  void PressRightButton();
+
+  // Generates a right button release event.
+  void ReleaseRightButton();
+
+  // Moves the mouse wheel by |delta_x|, |delta_y|.
+  void MoveMouseWheel(int delta_x, int delta_y);
+
+  // Generates a mouse exit.
+  void SendMouseExit();
+
+  // Generates events to move mouse to be the given |point| in the
+  // |current_root_window_|'s host window coordinates.
+  void MoveMouseToInHost(const gfx::Point& point_in_host);
+  void MoveMouseToInHost(int x, int y) {
+    MoveMouseToInHost(gfx::Point(x, y));
+  }
+
+  // Generates events to move mouse to be the given |point| in screen
+  // coordinates.
+  void MoveMouseTo(const gfx::Point& point_in_screen, int count);
+  void MoveMouseTo(const gfx::Point& point_in_screen) {
+    MoveMouseTo(point_in_screen, 1);
+  }
+  void MoveMouseTo(int x, int y) {
+    MoveMouseTo(gfx::Point(x, y));
+  }
+
+  // Generates events to move mouse to be the given |point| in |window|'s
+  // coordinates.
+  void MoveMouseRelativeTo(const EventTarget* window, const gfx::Point& point);
+  void MoveMouseRelativeTo(const EventTarget* window, int x, int y) {
+    MoveMouseRelativeTo(window, gfx::Point(x, y));
+  }
+
+  void MoveMouseBy(int x, int y) {
+    MoveMouseTo(current_location_ + gfx::Vector2d(x, y));
+  }
+
+  // Generates events to drag mouse to given |point|.
+  void DragMouseTo(const gfx::Point& point);
+
+  void DragMouseTo(int x, int y) {
+    DragMouseTo(gfx::Point(x, y));
+  }
+
+  void DragMouseBy(int dx, int dy) {
+    DragMouseTo(current_location_ + gfx::Vector2d(dx, dy));
+  }
+
+  // Generates events to move the mouse to the center of the window.
+  void MoveMouseToCenterOf(EventTarget* window);
+
+  // Generates a touch press event.
+  void PressTouch();
+
+  // Generates a touch press event with |touch_id|.
+  void PressTouchId(int touch_id);
+
+  // Generates a ET_TOUCH_MOVED event to |point|.
+  void MoveTouch(const gfx::Point& point);
+
+  // Generates a ET_TOUCH_MOVED event to |point| with |touch_id|.
+  void MoveTouchId(const gfx::Point& point, int touch_id);
+
+  // Generates a touch release event.
+  void ReleaseTouch();
+
+  // Generates a touch release event with |touch_id|.
+  void ReleaseTouchId(int touch_id);
+
+  // Generates press, move and release event to move touch
+  // to be the given |point|.
+  void PressMoveAndReleaseTouchTo(const gfx::Point& point);
+
+  void PressMoveAndReleaseTouchTo(int x, int y) {
+    PressMoveAndReleaseTouchTo(gfx::Point(x, y));
+  }
+
+  void PressMoveAndReleaseTouchBy(int x, int y) {
+    PressMoveAndReleaseTouchTo(current_location_ + gfx::Vector2d(x, y));
+  }
+
+  // Generates press, move and release events to move touch
+  // to the center of the window.
+  void PressMoveAndReleaseTouchToCenterOf(EventTarget* window);
+
+  // Generates and dispatches a Win8 edge-swipe event (swipe up from bottom or
+  // swipe down from top).  Note that it is not possible to distinguish between
+  // the two edges with this event.
+  void GestureEdgeSwipe();
+
+  // Generates and dispatches touch-events required to generate a TAP gesture.
+  // Note that this can generate a number of other gesture events at the same
+  // time (e.g. GESTURE_BEGIN, TAP_DOWN, END).
+  void GestureTapAt(const gfx::Point& point);
+
+  // Generates press and release touch-events to generate a TAP_DOWN event, but
+  // without generating any scroll or tap events. This can also generate a few
+  // other gesture events (e.g. GESTURE_BEGIN, END).
+  void GestureTapDownAndUp(const gfx::Point& point);
+
+  // Calculates a time duration that can be used with the given |start|, |end|,
+  // and |steps| values when calling GestureScrollSequence (or
+  // GestureScrollSequenceWithCallback) to achieve the given |velocity|.
+  base::TimeDelta CalculateScrollDurationForFlingVelocity(
+      const gfx::Point& start,
+      const gfx::Point& end,
+      float velocity,
+      int steps);
+
+  // Generates press, move, release touch-events to generate a sequence of
+  // scroll events. |duration| and |steps| affect the velocity of the scroll,
+  // and depending on these values, this may also generate FLING scroll
+  // gestures. If velocity/fling is irrelevant for the test, then any non-zero
+  // values for these should be sufficient.
+  void GestureScrollSequence(const gfx::Point& start,
+                             const gfx::Point& end,
+                             const base::TimeDelta& duration,
+                             int steps);
+
+  // The same as GestureScrollSequence(), with the exception that |callback| is
+  // called at each step of the scroll sequence. |callback| is called at the
+  // start of the sequence with ET_GESTURE_SCROLL_BEGIN, followed by one or more
+  // ET_GESTURE_SCROLL_UPDATE and ends with an ET_GESTURE_SCROLL_END.
+  void GestureScrollSequenceWithCallback(const gfx::Point& start,
+                                         const gfx::Point& end,
+                                         const base::TimeDelta& duration,
+                                         int steps,
+                                         const ScrollStepCallback& callback);
+
+  // Generates press, move, release touch-events to generate a sequence of
+  // multi-finger scroll events. |count| specifies the number of touch-points
+  // that should generate the scroll events. |start| are the starting positions
+  // of all the touch points. |steps| and |event_separation_time_ms| are
+  // relevant when testing velocity/fling/swipe, otherwise these can be any
+  // non-zero value. |delta_x| and |delta_y| are the amount that each finger
+  // should be moved. Internally calls GestureMultiFingerScrollWithDelays
+  // with zeros as |delay_adding_finger_ms| forcing all touch down events to be
+  // immediate.
+  void GestureMultiFingerScroll(int count,
+                                const gfx::Point start[],
+                                int event_separation_time_ms,
+                                int steps,
+                                int move_x,
+                                int move_y);
+
+  // Generates press, move, release touch-events to generate a sequence of
+  // multi-finger scroll events. |count| specifies the number of touch-points
+  // that should generate the scroll events. |start| are the starting positions
+  // of all the touch points. |delay_adding_finger_ms| are delays in ms from the
+  // starting time till touching down of each finger. |delay_adding_finger_ms|
+  // is useful when testing complex gestures that start with 1 or 2 fingers and
+  // add fingers with a delay. |steps| and |event_separation_time_ms| are
+  // relevant when testing velocity/fling/swipe, otherwise these can be any
+  // non-zero value. |delta_x| and |delta_y| are the amount that each finger
+  // should be moved.
+  void GestureMultiFingerScrollWithDelays(int count,
+                                          const gfx::Point start[],
+                                          const int delay_adding_finger_ms[],
+                                          int event_separation_time_ms,
+                                          int steps,
+                                          int move_x,
+                                          int move_y);
+
+  // Generates scroll sequences of a FlingCancel, Scrolls, FlingStart, with
+  // constant deltas to |x_offset| and |y_offset| in |steps|.
+  void ScrollSequence(const gfx::Point& start,
+                      const base::TimeDelta& step_delay,
+                      float x_offset,
+                      float y_offset,
+                      int steps,
+                      int num_fingers);
+
+  // Generates scroll sequences of a FlingCancel, Scrolls, FlingStart, sending
+  // scrolls of each of the values in |offsets|.
+  void ScrollSequence(const gfx::Point& start,
+                      const base::TimeDelta& step_delay,
+                      const std::vector<gfx::PointF>& offsets,
+                      int num_fingers);
+
+  // Generates a key press event. On platforms except Windows and X11, a key
+  // event without native_event() is generated. Note that ui::EF_ flags should
+  // be passed as |flags|, not the native ones like 'ShiftMask' in <X11/X.h>.
+  // TODO(yusukes): Support native_event() on all platforms.
+  void PressKey(KeyboardCode key_code, int flags);
+
+  // Generates a key release event. On platforms except Windows and X11, a key
+  // event without native_event() is generated. Note that ui::EF_ flags should
+  // be passed as |flags|, not the native ones like 'ShiftMask' in <X11/X.h>.
+  // TODO(yusukes): Support native_event() on all platforms.
+  void ReleaseKey(KeyboardCode key_code, int flags);
+
+  // Dispatch the event to the WindowEventDispatcher.
+  void Dispatch(Event* event);
+
+  void set_current_target(EventTarget* target) {
+    current_target_ = target;
+  }
+
+  // Specify an alternative tick clock to be used for simulating time in tests.
+  void SetTickClock(scoped_ptr<base::TickClock> tick_clock);
+
+  // Get the current time from the tick clock.
+  base::TimeDelta Now();
+
+  // Default delegate set by a platform-specific GeneratorDelegate singleton.
+  static EventGeneratorDelegate* default_delegate;
+
+ private:
+  // Set up the test context using the delegate.
+  void Init(gfx::NativeWindow root_window, gfx::NativeWindow window_context);
+
+  // Dispatch a key event to the WindowEventDispatcher.
+  void DispatchKeyEvent(bool is_press, KeyboardCode key_code, int flags);
+
+  void UpdateCurrentDispatcher(const gfx::Point& point);
+  void PressButton(int flag);
+  void ReleaseButton(int flag);
+
+  gfx::Point GetLocationInCurrentRoot() const;
+  gfx::Point CenterOfWindow(const EventTarget* window) const;
+
+  void DispatchNextPendingEvent();
+  void DoDispatchEvent(Event* event, bool async);
+
+  const EventGeneratorDelegate* delegate() const;
+  EventGeneratorDelegate* delegate();
+
+  scoped_ptr<EventGeneratorDelegate> delegate_;
+  gfx::Point current_location_;
+  EventTarget* current_target_;
+  int flags_;
+  bool grab_;
+  std::list<Event*> pending_events_;
+  // Set to true to cause events to be posted asynchronously.
+  bool async_;
+  bool targeting_application_;
+  scoped_ptr<base::TickClock> tick_clock_;
+
+  DISALLOW_COPY_AND_ASSIGN(EventGenerator);
+};
+
+}  // namespace test
+}  // namespace ui
+
+#endif  // UI_EVENTS_TEST_EVENT_GENERATOR_H_