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// Copyright (c) 2006-2008 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 WEBKIT_GLUE_WEBINPUTEVENT_H_
#define WEBKIT_GLUE_WEBINPUTEVENT_H_
#include "base/basictypes.h"
#include "base/string16.h"
#if defined(OS_WIN)
#include <windows.h>
#elif defined(OS_MACOSX)
#ifdef __OBJC__
@class NSEvent;
@class NSView;
#else
class NSEvent;
class NSView;
#endif // __OBJC__
#elif defined(OS_LINUX)
#include <glib.h>
typedef struct _GdkEventButton GdkEventButton;
typedef struct _GdkEventMotion GdkEventMotion;
typedef struct _GdkEventScroll GdkEventScroll;
typedef struct _GdkEventKey GdkEventKey;
#endif
// The classes defined in this file are intended to be used with WebView's
// HandleInputEvent method. These event types are cross-platform; however,
// there are platform-specific constructors that accept native UI events.
//
// The fields of these event classes roughly correspond to the fields required
// by WebCore's platform event classes.
//
// WARNING! These classes must remain PODs (plain old data). They will be
// "serialized" by shipping their raw bytes across the wire, so they must not
// contain any non-bit-copyable member variables!
// WebInputEvent --------------------------------------------------------------
class WebInputEvent {
public:
WebInputEvent() : modifiers(0) { }
// There are two schemes used for keyboard input. On Windows (and,
// interestingly enough, on Mac Carbon) there are two events for a keypress.
// One is a raw keydown, which provides the keycode only. If the app doesn't
// handle that, then the system runs key translation to create an event
// containing the generated character and pumps that event. In such a scheme,
// those two events are translated to RAW_KEY_DOWN and CHAR events
// respectively. In Cocoa and Gtk, key events contain both the keycode and any
// translation into actual text. In such a case, WebCore will eventually need
// to split the events (see disambiguateKeyDownEvent and its callers) but we
// don't worry about that here. We just use a different type (KEY_DOWN) to
// indicate this.
enum Type {
// WebMouseEvent
MOUSE_DOWN,
MOUSE_UP,
MOUSE_MOVE,
MOUSE_LEAVE,
MOUSE_DOUBLE_CLICK,
// WebMouseWheelEvent
MOUSE_WHEEL,
// WebKeyboardEvent
RAW_KEY_DOWN,
KEY_DOWN,
KEY_UP,
CHAR
};
enum Modifiers {
// modifiers for all events:
SHIFT_KEY = 1 << 0,
CTRL_KEY = 1 << 1,
ALT_KEY = 1 << 2,
META_KEY = 1 << 3,
// modifiers for keyboard events:
IS_KEYPAD = 1 << 4,
IS_AUTO_REPEAT = 1 << 5
};
Type type;
int modifiers;
// Returns true if the WebInputEvent |type| is a keyboard event.
static bool IsKeyboardEventType(int type) {
return type == RAW_KEY_DOWN ||
type == KEY_DOWN ||
type == KEY_UP ||
type == CHAR;
}
};
// WebMouseEvent --------------------------------------------------------------
class WebMouseEvent : public WebInputEvent {
public:
// These values defined for WebCore::MouseButton
enum Button {
BUTTON_NONE = -1,
BUTTON_LEFT,
BUTTON_MIDDLE,
BUTTON_RIGHT
};
Button button;
int x;
int y;
int global_x;
int global_y;
double timestamp_sec; // Seconds since epoch.
int layout_test_click_count; // Only used during layout tests.
WebMouseEvent() {}
#if defined(OS_WIN)
WebMouseEvent(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
#elif defined(OS_MACOSX)
WebMouseEvent(NSEvent *event, NSView* view);
#elif defined(OS_LINUX)
explicit WebMouseEvent(const GdkEventButton* event);
explicit WebMouseEvent(const GdkEventMotion* event);
#endif
};
// WebMouseWheelEvent ---------------------------------------------------------
class WebMouseWheelEvent : public WebMouseEvent {
public:
float delta_x;
float delta_y;
bool scroll_by_page;
WebMouseWheelEvent() {}
#if defined(OS_WIN)
WebMouseWheelEvent(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
#elif defined(OS_MACOSX)
WebMouseWheelEvent(NSEvent *event, NSView* view);
#elif defined(OS_LINUX)
explicit WebMouseWheelEvent(const GdkEventScroll* event);
#endif
};
// WebKeyboardEvent -----------------------------------------------------------
// Caps on string lengths so we can make them static arrays and keep them PODs.
const size_t kTextLengthCap = 4;
// http://www.w3.org/TR/DOM-Level-3-Events/keyset.html lists the identifiers.
// The longest is 18 characters, so we'll round up to the next multiple of 4.
const size_t kIdentifierLengthCap = 20;
class WebKeyboardEvent : public WebInputEvent {
public:
// |windows_key_code| is the Windows key code associated with this key event.
// Sometimes it's direct from the event (i.e. on Windows), sometimes it's via
// a mapping function. If you want a list, see
// webkit/port/platform/chromium/KeyboardCodes* .
int windows_key_code;
// The actual key code genenerated by the platform. The DOM spec runs on
// Windows-equivalent codes (thus |windows_key_code| above) but it doesn't
// hurt to have this one around.
int native_key_code;
// |text| is the text generated by this keystroke. |unmodified_text| is
// |text|, but unmodified by an concurrently-held modifiers (except shift).
// This is useful for working out shortcut keys. Linux and Windows guarantee
// one character per event. The Mac does not, but in reality that's all it
// ever gives. We're generous, and cap it a bit longer.
char16 text[kTextLengthCap];
char16 unmodified_text[kTextLengthCap];
// This is a string identifying the key pressed.
char key_identifier[kIdentifierLengthCap];
// This identifies whether this event was tagged by the system as being a
// "system key" event (see
// http://msdn.microsoft.com/en-us/library/ms646286(VS.85).aspx for details).
// Other platforms don't have this concept, but it's just easier to leave it
// always false than ifdef.
bool system_key;
// References to the original event.
#if defined(OS_WIN)
MSG actual_message; // Set to the current keyboard message. TODO(avi): remove
#endif
WebKeyboardEvent() : windows_key_code(0),
native_key_code(0),
system_key(false) {
memset(&text, 0, sizeof(text));
memset(&unmodified_text, 0, sizeof(unmodified_text));
memset(&key_identifier, 0, sizeof(key_identifier));
#if defined(OS_WIN)
memset(&actual_message, 0, sizeof(actual_message));
#endif
}
#if defined(OS_WIN)
explicit WebKeyboardEvent(HWND hwnd, UINT message, WPARAM wparam,
LPARAM lparam);
#elif defined(OS_MACOSX)
explicit WebKeyboardEvent(NSEvent *event);
#elif defined(OS_LINUX)
explicit WebKeyboardEvent(const GdkEventKey* event);
#endif
};
#endif // WEBKIT_GLUE_WEBINPUTEVENT_H_
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