mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-30 21:55:31 +00:00
340 lines
11 KiB
C++
340 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/* vim:expandtab:shiftwidth=4:tabstop=4:
|
|
*/
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef __nsGdkKeyUtils_h__
|
|
#define __nsGdkKeyUtils_h__
|
|
|
|
#include "nsTArray.h"
|
|
#include "mozilla/EventForwards.h"
|
|
|
|
#include <gdk/gdk.h>
|
|
#include <X11/XKBlib.h>
|
|
|
|
namespace mozilla {
|
|
namespace widget {
|
|
|
|
/**
|
|
* KeymapWrapper is a wrapper class of GdkKeymap. GdkKeymap doesn't support
|
|
* all our needs, therefore, we need to access lower level APIs.
|
|
* But such code is usually complex and might be slow. Against such issues,
|
|
* we should cache some information.
|
|
*
|
|
* This class provides only static methods. The methods is using internal
|
|
* singleton instance which is initialized by default GdkKeymap. When the
|
|
* GdkKeymap is destroyed, the singleton instance will be destroyed.
|
|
*/
|
|
|
|
class KeymapWrapper
|
|
{
|
|
public:
|
|
/**
|
|
* Compute an our DOM keycode from a GDK keyval.
|
|
*/
|
|
static uint32_t ComputeDOMKeyCode(const GdkEventKey* aGdkKeyEvent);
|
|
|
|
/**
|
|
* Compute a DOM key name index from aGdkKeyEvent.
|
|
*/
|
|
KeyNameIndex ComputeDOMKeyNameIndex(const GdkEventKey* aGdkKeyEvent);
|
|
|
|
/**
|
|
* Modifier is list of modifiers which we support in widget level.
|
|
*/
|
|
enum Modifier {
|
|
NOT_MODIFIER = 0x0000,
|
|
CAPS_LOCK = 0x0001,
|
|
NUM_LOCK = 0x0002,
|
|
SCROLL_LOCK = 0x0004,
|
|
SHIFT = 0x0008,
|
|
CTRL = 0x0010,
|
|
ALT = 0x0020,
|
|
META = 0x0040,
|
|
SUPER = 0x0080,
|
|
HYPER = 0x0100,
|
|
LEVEL3 = 0x0200,
|
|
LEVEL5 = 0x0400
|
|
};
|
|
|
|
/**
|
|
* Modifiers is used for combination of Modifier.
|
|
* E.g., |Modifiers modifiers = (SHIFT | CTRL);| means Shift and Ctrl.
|
|
*/
|
|
typedef uint32_t Modifiers;
|
|
|
|
/**
|
|
* GetCurrentModifierState() returns current modifier key state.
|
|
* The "current" means actual state of hardware keyboard when this is
|
|
* called. I.e., if some key events are not still dispatched by GDK,
|
|
* the state may mismatch with GdkEventKey::state.
|
|
*
|
|
* @return Current modifier key state.
|
|
*/
|
|
static guint GetCurrentModifierState();
|
|
|
|
/**
|
|
* AreModifiersCurrentlyActive() checks the "current" modifier state
|
|
* on aGdkWindow with the keymap of the singleton instance.
|
|
*
|
|
* @param aModifiers One or more of Modifier values except
|
|
* NOT_MODIFIER.
|
|
* @return TRUE if all of modifieres in aModifiers are
|
|
* active. Otherwise, FALSE.
|
|
*/
|
|
static bool AreModifiersCurrentlyActive(Modifiers aModifiers);
|
|
|
|
/**
|
|
* AreModifiersActive() just checks whether aModifierState indicates
|
|
* all modifiers in aModifiers are active or not.
|
|
*
|
|
* @param aModifiers One or more of Modifier values except
|
|
* NOT_MODIFIER.
|
|
* @param aModifierState GDK's modifier states.
|
|
* @return TRUE if aGdkModifierType indecates all of
|
|
* modifiers in aModifier are active.
|
|
* Otherwise, FALSE.
|
|
*/
|
|
static bool AreModifiersActive(Modifiers aModifiers,
|
|
guint aModifierState);
|
|
|
|
/**
|
|
* InitInputEvent() initializes the aInputEvent with aModifierState.
|
|
*/
|
|
static void InitInputEvent(WidgetInputEvent& aInputEvent,
|
|
guint aModifierState);
|
|
|
|
/**
|
|
* InitKeyEvent() intializes aKeyEvent's modifier key related members
|
|
* and keycode related values.
|
|
*
|
|
* @param aKeyEvent It's an WidgetKeyboardEvent which needs to be
|
|
* initialized.
|
|
* @param aGdkKeyEvent A native GDK key event.
|
|
*/
|
|
static void InitKeyEvent(WidgetKeyboardEvent& aKeyEvent,
|
|
GdkEventKey* aGdkKeyEvent);
|
|
|
|
/**
|
|
* IsKeyPressEventNecessary() returns TRUE when aGdkKeyEvent should cause
|
|
* a DOM keypress event. Otherwise, FALSE.
|
|
*/
|
|
static bool IsKeyPressEventNecessary(GdkEventKey* aGdkKeyEvent);
|
|
|
|
protected:
|
|
|
|
/**
|
|
* GetInstance() returns a KeymapWrapper instance.
|
|
*
|
|
* @return A singleton instance of KeymapWrapper.
|
|
*/
|
|
static KeymapWrapper* GetInstance();
|
|
|
|
KeymapWrapper();
|
|
~KeymapWrapper();
|
|
|
|
bool mInitialized;
|
|
|
|
/**
|
|
* Initializing methods.
|
|
*/
|
|
void Init();
|
|
void InitXKBExtension();
|
|
void InitBySystemSettings();
|
|
|
|
/**
|
|
* mModifierKeys stores each hardware key information.
|
|
*/
|
|
struct ModifierKey {
|
|
guint mHardwareKeycode;
|
|
guint mMask;
|
|
|
|
ModifierKey(guint aHardwareKeycode) :
|
|
mHardwareKeycode(aHardwareKeycode), mMask(0)
|
|
{
|
|
}
|
|
};
|
|
nsTArray<ModifierKey> mModifierKeys;
|
|
|
|
/**
|
|
* GetModifierKey() returns modifier key information of the hardware
|
|
* keycode. If the key isn't a modifier key, returns nullptr.
|
|
*/
|
|
ModifierKey* GetModifierKey(guint aHardwareKeycode);
|
|
|
|
/**
|
|
* mModifierMasks is bit masks for each modifier. The index should be one
|
|
* of ModifierIndex values.
|
|
*/
|
|
enum ModifierIndex {
|
|
INDEX_NUM_LOCK,
|
|
INDEX_SCROLL_LOCK,
|
|
INDEX_ALT,
|
|
INDEX_META,
|
|
INDEX_SUPER,
|
|
INDEX_HYPER,
|
|
INDEX_LEVEL3,
|
|
INDEX_LEVEL5,
|
|
COUNT_OF_MODIFIER_INDEX
|
|
};
|
|
guint mModifierMasks[COUNT_OF_MODIFIER_INDEX];
|
|
|
|
guint GetModifierMask(Modifier aModifier) const;
|
|
|
|
/**
|
|
* @param aGdkKeyval A GDK defined modifier key value such as
|
|
* GDK_Shift_L.
|
|
* @return Returns Modifier values for aGdkKeyval.
|
|
* If the given key code isn't a modifier key,
|
|
* returns NOT_MODIFIER.
|
|
*/
|
|
static Modifier GetModifierForGDKKeyval(guint aGdkKeyval);
|
|
|
|
#ifdef PR_LOGGING
|
|
static const char* GetModifierName(Modifier aModifier);
|
|
#endif // PR_LOGGING
|
|
|
|
/**
|
|
* mGdkKeymap is a wrapped instance by this class.
|
|
*/
|
|
GdkKeymap* mGdkKeymap;
|
|
|
|
/**
|
|
* The base event code of XKB extension.
|
|
*/
|
|
int mXKBBaseEventCode;
|
|
|
|
/**
|
|
* Only auto_repeats[] stores valid value. If you need to use other
|
|
* members, you need to listen notification events for them.
|
|
* See a call of XkbSelectEventDetails() with XkbControlsNotify in
|
|
* InitXKBExtension().
|
|
*/
|
|
XKeyboardState mKeyboardState;
|
|
|
|
/**
|
|
* Pointer of the singleton instance.
|
|
*/
|
|
static KeymapWrapper* sInstance;
|
|
|
|
/**
|
|
* Auto key repeat management.
|
|
*/
|
|
static guint sLastRepeatableHardwareKeyCode;
|
|
enum RepeatState
|
|
{
|
|
NOT_PRESSED,
|
|
FIRST_PRESS,
|
|
REPEATING
|
|
};
|
|
static RepeatState sRepeatState;
|
|
|
|
/**
|
|
* IsAutoRepeatableKey() returns true if the key supports auto repeat.
|
|
* Otherwise, false.
|
|
*/
|
|
bool IsAutoRepeatableKey(guint aHardwareKeyCode);
|
|
|
|
/**
|
|
* Signal handlers.
|
|
*/
|
|
static void OnKeysChanged(GdkKeymap* aKeymap, KeymapWrapper* aKeymapWrapper);
|
|
static void OnDestroyKeymap(KeymapWrapper* aKeymapWrapper,
|
|
GdkKeymap *aGdkKeymap);
|
|
|
|
/**
|
|
* GetCharCodeFor() Computes what character is inputted by the key event
|
|
* with aModifierState and aGroup.
|
|
*
|
|
* @param aGdkKeyEvent Native key event, must not be nullptr.
|
|
* @param aModifierState Combination of GdkModifierType which you
|
|
* want to test with aGdkKeyEvent.
|
|
* @param aGroup Set group in the mGdkKeymap.
|
|
* @return charCode which is inputted by aGdkKeyEvent.
|
|
* If failed, this returns 0.
|
|
*/
|
|
static uint32_t GetCharCodeFor(const GdkEventKey *aGdkKeyEvent);
|
|
uint32_t GetCharCodeFor(const GdkEventKey *aGdkKeyEvent,
|
|
guint aModifierState,
|
|
gint aGroup);
|
|
|
|
/**
|
|
* GetKeyLevel() returns level of the aGdkKeyEvent in mGdkKeymap.
|
|
*
|
|
* @param aGdkKeyEvent Native key event, must not be nullptr.
|
|
* @return Using level. Typically, this is 0 or 1.
|
|
* If failed, this returns -1.
|
|
*/
|
|
gint GetKeyLevel(GdkEventKey *aGdkKeyEvent);
|
|
|
|
/**
|
|
* GetFirstLatinGroup() returns group of mGdkKeymap which can input an
|
|
* ASCII character by GDK_A.
|
|
*
|
|
* @return group value of GdkEventKey.
|
|
*/
|
|
gint GetFirstLatinGroup();
|
|
|
|
/**
|
|
* IsLatinGroup() checkes whether the keyboard layout of aGroup is
|
|
* ASCII alphabet inputtable or not.
|
|
*
|
|
* @param aGroup The group value of GdkEventKey.
|
|
* @return TRUE if the keyboard layout can input
|
|
* ASCII alphabet. Otherwise, FALSE.
|
|
*/
|
|
bool IsLatinGroup(guint8 aGroup);
|
|
|
|
/**
|
|
* IsBasicLatinLetterOrNumeral() Checks whether the aCharCode is an
|
|
* alphabet or a numeric character in ASCII.
|
|
*
|
|
* @param aCharCode Charcode which you want to test.
|
|
* @return TRUE if aCharCode is an alphabet or a numeric
|
|
* in ASCII range. Otherwise, FALSE.
|
|
*/
|
|
static bool IsBasicLatinLetterOrNumeral(uint32_t aCharCode);
|
|
|
|
/**
|
|
* GetGDKKeyvalWithoutModifier() returns the keyval for aGdkKeyEvent when
|
|
* ignoring the modifier state except NumLock. (NumLock is a key to change
|
|
* some key's meaning.)
|
|
*/
|
|
static guint GetGDKKeyvalWithoutModifier(const GdkEventKey *aGdkKeyEvent);
|
|
|
|
/**
|
|
* GetDOMKeyCodeFromKeyPairs() returns DOM keycode for aGdkKeyval if
|
|
* it's in KeyPair table.
|
|
*/
|
|
static uint32_t GetDOMKeyCodeFromKeyPairs(guint aGdkKeyval);
|
|
|
|
/**
|
|
* InitKeypressEvent() intializes keyCode, charCode and
|
|
* alternativeCharCodes of keypress event.
|
|
*
|
|
* @param aKeyEvent An NS_KEY_PRESS event, must not be nullptr.
|
|
* The modifier related members and keyCode must
|
|
* be initialized already.
|
|
* @param aGdkKeyEvent A native key event which causes dispatching
|
|
* aKeyEvent.
|
|
*/
|
|
void InitKeypressEvent(WidgetKeyboardEvent& aKeyEvent,
|
|
GdkEventKey* aGdkKeyEvent);
|
|
|
|
/**
|
|
* FilterEvents() listens all events on all our windows.
|
|
* Be careful, this may make damage to performance if you add expensive
|
|
* code in this method.
|
|
*/
|
|
static GdkFilterReturn FilterEvents(GdkXEvent* aXEvent,
|
|
GdkEvent* aGdkEvent,
|
|
gpointer aData);
|
|
};
|
|
|
|
} // namespace widget
|
|
} // namespace mozilla
|
|
|
|
#endif /* __nsGdkKeyUtils_h__ */
|