qkeymapper_x11.cpp

奇趣公司比较新的qt/emd版本

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#include "qkeymapper_p.h"

#include "qdebug.h"
#include "qtextcodec.h"
#include "qwidget.h"

#include "qapplication_p.h"
#include "qevent_p.h"
#include "qt_x11_p.h"

#ifndef QT_NO_XKB
#  include <X11/XKBlib.h>
#endif

#define XK_MISCELLANY
#define XK_LATIN1
#define XK_KOREAN
#define XK_XKB_KEYS
#include <X11/keysymdef.h>

#include <ctype.h>

#ifndef QT_NO_XKB

// bring in the auto-generated xkbLayoutData
#include "qkeymapper_x11_p.cpp"


static void getLocaleAndDirection(QLocale *locale,
                                  Qt::LayoutDirection *direction,
                                  const QByteArray &layoutName,
                                  const QByteArray &variantName)
{
    int i = 0;
    while (xkbLayoutData[i].layout != 0) {
        if (layoutName == xkbLayoutData[i].layout && variantName == xkbLayoutData[i].variant) {
            *locale = QLocale(xkbLayoutData[i].language, xkbLayoutData[i].country);
            *direction = xkbLayoutData[i].direction;
            return;
        }
        ++i;
    }
    *locale = QLocale::c();
    *direction = Qt::LeftToRight;
}
#endif // QT_NO_XKB


// from qapplication_x11.cpp
extern uchar qt_alt_mask;
extern uchar qt_meta_mask;
extern uchar qt_super_mask;
extern uchar qt_hyper_mask;
extern uchar qt_mode_switch_mask;
uchar qt_num_lock_mask = 0;
extern bool qt_sendSpontaneousEvent(QObject*, QEvent*);

// ### we should really resolve conflicts with other masks by
// ### decomposing the Qt::KeyboardModifers in possibleKeys()
#define SETMASK(sym, mask)                                              \
    do {                                                                \
        if (qt_alt_mask == 0                                            \
            && qt_meta_mask != mask                                     \
            && qt_super_mask != mask                                    \
            && qt_hyper_mask != mask                                    \
            && (sym == XK_Alt_L || sym == XK_Alt_R)) {                  \
            qt_alt_mask = mask;                                         \
        }                                                               \
        if (qt_meta_mask == 0                                           \
            && qt_alt_mask != mask                                      \
            && qt_super_mask != mask                                    \
            && qt_hyper_mask != mask                                    \
            && (sym == XK_Meta_L || sym == XK_Meta_R)) {                \
            qt_meta_mask = mask;                                        \
        }                                                               \
        if (qt_super_mask == 0                                          \
            && qt_alt_mask != mask                                      \
            && qt_meta_mask != mask                                     \
            && qt_hyper_mask != mask                                    \
            && (sym == XK_Super_L || sym == XK_Super_R)) {              \
            qt_super_mask = mask;                                       \
        }                                                               \
        if (qt_hyper_mask == 0                                          \
            && qt_alt_mask != mask                                      \
            && qt_meta_mask != mask                                     \
            && qt_super_mask != mask                                    \
            && (sym == XK_Hyper_L || sym == XK_Hyper_R)) {              \
            qt_hyper_mask = mask;                                       \
        }                                                               \
        if (qt_mode_switch_mask == 0                                    \
            && qt_alt_mask != mask                                      \
            && qt_meta_mask != mask                                     \
            && qt_super_mask != mask                                    \
            && qt_hyper_mask != mask                                    \
            && sym == XK_Mode_switch) {                                 \
            qt_mode_switch_mask = mask;                                 \
        }                                                               \
        if (qt_num_lock_mask == 0                                       \
            && sym == XK_Num_Lock) {                                    \
            qt_num_lock_mask = mask;                                    \
        }                                                               \
    } while(false)

// qt_XTranslateKey() is based on _XTranslateKey() taken from:

/* $Xorg: KeyBind.c,v 1.4 2001/02/09 02:03:34 xorgcvs Exp $ */

/*

Copyright 1985, 1987, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.

*/
static int
qt_XTranslateKey(register QXCoreDesc *dpy,
                 KeyCode keycode,
                 register unsigned int modifiers,
                 unsigned int *modifiers_return,
                 KeySym *keysym_return)
{
    int per;
    register KeySym *syms;
    KeySym sym, lsym, usym;

    if (! dpy->keysyms)
	return 0;
    *modifiers_return = ((ShiftMask|LockMask)
			 | dpy->mode_switch | dpy->num_lock);
    if (((int)keycode < dpy->min_keycode) || ((int)keycode > dpy->max_keycode))
    {
	*keysym_return = NoSymbol;
	return 1;
    }
    per = dpy->keysyms_per_keycode;
    syms = &dpy->keysyms[(keycode - dpy->min_keycode) * per];
    while ((per > 2) && (syms[per - 1] == NoSymbol))
	per--;
    if ((per > 2) && (modifiers & dpy->mode_switch)) {
	syms += 2;
	per -= 2;
    }
    if ((modifiers & dpy->num_lock) &&
	(per > 1 && (IsKeypadKey(syms[1]) || IsPrivateKeypadKey(syms[1])))) {
	if ((modifiers & ShiftMask) ||
	    ((modifiers & LockMask) && (dpy->lock_meaning == XK_Shift_Lock)))
	    *keysym_return = syms[0];
	else
	    *keysym_return = syms[1];
    } else if (!(modifiers & ShiftMask) &&
	(!(modifiers & LockMask) || (dpy->lock_meaning == NoSymbol))) {
	if ((per == 1) || (syms[1] == NoSymbol))
	    XConvertCase(syms[0], keysym_return, &usym);
	else
	    *keysym_return = syms[0];
    } else if (!(modifiers & LockMask) ||
	       (dpy->lock_meaning != XK_Caps_Lock)) {
	if ((per == 1) || ((usym = syms[1]) == NoSymbol))
	    XConvertCase(syms[0], &lsym, &usym);
	*keysym_return = usym;
    } else {
	if ((per == 1) || ((sym = syms[1]) == NoSymbol))
	    sym = syms[0];
	XConvertCase(sym, &lsym, &usym);
	if (!(modifiers & ShiftMask) && (sym != syms[0]) &&
	    ((sym != usym) || (lsym == usym)))
	    XConvertCase(syms[0], &lsym, &usym);
	*keysym_return = usym;
    }
    if (*keysym_return == XK_VoidSymbol)
	*keysym_return = NoSymbol;
    return 1;
}




QKeyMapperPrivate::QKeyMapperPrivate()
    : keyboardInputDirection(Qt::LeftToRight), useXKB(false)
{
    memset(&coreDesc, 0, sizeof(coreDesc));

#ifndef QT_NO_XKB
    int opcode = -1;
    int xkbEventBase = -1;
    int xkbErrorBase = -1;
    int xkblibMajor = XkbMajorVersion;
    int xkblibMinor = XkbMinorVersion;
    if (XkbQueryExtension(X11->display, &opcode, &xkbEventBase, &xkbErrorBase, &xkblibMajor, &xkblibMinor))
        useXKB = true;
#endif

#if 0
    qDebug() << "useXKB =" << useXKB;
#endif
}

QKeyMapperPrivate::~QKeyMapperPrivate()
{
    if (coreDesc.keysyms)
        XFree(coreDesc.keysyms);
}

QList<int> QKeyMapperPrivate::possibleKeys(QKeyEvent *event)
{
#ifndef QT_NO_XKB
    if (useXKB)
        return possibleKeysXKB(event);
#endif
    return possibleKeysCore(event);
}

enum { MaxBits = sizeof(uint) * 8 };
static QString translateKeySym(KeySym keysym, uint xmodifiers,
                               int &code, Qt::KeyboardModifiers &modifiers,
                               QByteArray &chars, int &count);

QList<int> QKeyMapperPrivate::possibleKeysXKB(QKeyEvent *event)
{
#ifndef QT_NO_XKB
    const int xkeycode = event->nativeScanCode();
    const uint xmodifiers = event->nativeModifiers();

    // first, translate key only using lock modifiers (there are no Qt equivalents for these, so we must
    // always use them when determining the baseKeySym)
    KeySym baseKeySym;
    uint consumedModifiers;
    if (!XkbLookupKeySym(X11->display, xkeycode, (xmodifiers & (LockMask | qt_num_lock_mask)),
                         &consumedModifiers, &baseKeySym))
        return QList<int>();

    QList<int> result;

    // translate sym -> code
    Qt::KeyboardModifiers baseModifiers = 0;
    int baseCode = -1;
    QByteArray chars;
    int count = 0;
    QString text = translateKeySym(baseKeySym, xmodifiers, baseCode, baseModifiers, chars, count);
    if (baseCode == -1) {
        if (text.isEmpty())
            return QList<int>();
        baseCode = text.at(0).unicode();
    }

    if (baseCode && baseCode < 0xfffe)
        baseCode = QChar(baseCode).toUpper().unicode();
    result += (baseCode | baseModifiers);

    int pos1Bits[MaxBits];
    int num1Bits = 0;

    for (int i = 0; i < MaxBits; ++i) {
        if (consumedModifiers & (1 << i))
            pos1Bits[num1Bits++] = i;
    }

    const int numPerms = (1 << num1Bits);

    // translate the key again using each permutation of consumedModifiers
    for (int i = 1; i < numPerms; ++i) {
        uint val = 0;
        for (int j = 0; j < num1Bits; ++j) {
            if (i & (1 << j))
                val |= (1 << pos1Bits[j]);
        }

        if ((xmodifiers & val) != val)
            continue;

        KeySym sym;
        uint mods;
        if (!XkbLookupKeySym(X11->display, xkeycode, val, &mods, &sym))
            continue;

        // translate sym -> code
        Qt::KeyboardModifiers modifiers = 0;
        int code = -1;
        chars.clear();
        count = 0;
        // mask out the modifiers needed to translate keycode
        text = translateKeySym(sym, xmodifiers & ~val, code, modifiers, chars, count);
        if (code == -1) {
            if (text.isEmpty())
                continue;
            code = text.at(0).unicode();
        }

        if (code && code < 0xfffe)
            code = QChar(code).toUpper().unicode();
        if (code == baseCode)
            continue;

        result += (code | modifiers);
    }

#if 0
    qDebug() << "possibleKeysXKB()" << hex << result;
#endif
    return result;
#else
    Q_UNUSED(event);
    return QList<int>();
#endif // QT_NO_XKB
}

QList<int> QKeyMapperPrivate::possibleKeysCore(QKeyEvent *event)
{
    const int xkeycode = event->nativeScanCode();
    const uint xmodifiers = event->nativeModifiers();

    // first, translate key only using lock modifiers (there are no Qt equivalents for these, so we must
    // always use them when determining the baseKeySym)
    KeySym baseKeySym;
    uint consumedModifiers;
    if (!qt_XTranslateKey(&coreDesc, xkeycode, (xmodifiers & (LockMask | qt_num_lock_mask)),
                          &consumedModifiers, &baseKeySym))
        return QList<int>();

    QList<int> result;

    // translate sym -> code
    Qt::KeyboardModifiers baseModifiers = 0;
    int baseCode = -1;
    QByteArray chars;
    int count = 0;
    QString text = translateKeySym(baseKeySym, xmodifiers, baseCode, baseModifiers, chars, count);
    if (baseCode == -1) {
        if (text.isEmpty())
            return QList<int>();
        baseCode = text.at(0).unicode();
    }

    if (baseCode && baseCode < 0xfffe)
        baseCode = QChar(baseCode).toUpper().unicode();
    result += (baseCode | baseModifiers);

    int pos1Bits[MaxBits];
    int num1Bits = 0;

    for (int i = 0; i < MaxBits; ++i) {
        if (consumedModifiers & (1 << i))
            pos1Bits[num1Bits++] = i;
    }

    const int numPerms = (1 << num1Bits);