WINGs/winputmethod.c

   1
   2 #include <X11/Xlib.h>
   3
   4 #include "WINGsP.h"
   5
   6 typedef struct W_IMContext {
   7         XIM xim;
   8         XIMStyle ximstyle;
   9 } WMIMContext;
  10
  11 static void instantiateIM_cb(Display * display, XPointer client_data, XPointer call_data)
  12 {
  13         W_InitIM((W_Screen *) client_data);
  14 }
  15
  16 static void destroyIM_cb(XIM xim, XPointer client_data, XPointer call_data)
  17 {
  18         W_Screen *scr = (W_Screen *) client_data;
  19         W_View *target;
  20
  21         if (scr->imctx->xim != xim)
  22                 return;
  23
  24         target = scr->rootView->childrenList;
  25         while (target != NULL) {
  26                 W_DestroyIC(target);
  27                 target = target->nextSister;
  28         }
  29
  30         wfree(scr->imctx);
  31         scr->imctx = NULL;
  32
  33         XRegisterIMInstantiateCallback(scr->display, NULL, NULL, NULL, instantiateIM_cb, (XPointer) scr);
  34 }
  35
  36 void W_InitIM(W_Screen * scr)
  37 {
  38         XIM xim;
  39
  40         if (scr->imctx)
  41                 return;
  42
  43         xim = XOpenIM(scr->display, NULL, NULL, NULL);
  44
  45         if (xim) {
  46                 XIMStyles *im_styles;
  47                 XIMCallback cb;
  48                 int i;
  49
  50                 scr->imctx = wmalloc(sizeof(WMIMContext));
  51                 scr->imctx->xim = xim;
  52
  53                 cb.callback = destroyIM_cb;
  54                 cb.client_data = (XPointer) scr;
  55                 if (XSetIMValues(scr->imctx->xim, XNDestroyCallback, &cb, NULL))
  56                         wwarning("could not add destroy callback for input method");
  57                 XUnregisterIMInstantiateCallback(scr->display, NULL, NULL, NULL, instantiateIM_cb, (XPointer) scr);
  58                 /* Get available input style */
  59                 XGetIMValues(scr->imctx->xim, XNQueryInputStyle, &im_styles, NULL);
  60
  61                 scr->imctx->ximstyle = 0;
  62
  63                 for (i = 0; i < im_styles->count_styles && scr->imctx->ximstyle == 0; i++) {
  64                         if ((im_styles->supported_styles[i] & XIMPreeditPosition) &&
  65                             (im_styles->supported_styles[i] & XIMStatusNothing)) {
  66                                 scr->imctx->ximstyle = XIMPreeditPosition | XIMStatusNothing;
  67                         } else if ((im_styles->supported_styles[i] & XIMPreeditNothing) &&
  68                                    (im_styles->supported_styles[i] & XIMStatusNothing)) {
  69                                 scr->imctx->ximstyle = XIMPreeditNothing | XIMStatusNothing;
  70                         }
  71                 }
  72                 XFree(im_styles);
  73         } else {
  74                 XRegisterIMInstantiateCallback(scr->display, NULL, NULL, NULL, instantiateIM_cb, (XPointer) scr);
  75         }
  76 }
  77
  78 void W_CreateIC(WMView * view)
  79 {
  80         WMScreen *scr = W_VIEW_SCREEN(view);
  81         XVaNestedList preedit_attr = NULL;
  82
  83         if (view->xic || !view->flags.realized || !scr->imctx)
  84                 return;
  85
  86         if (scr->imctx->ximstyle & XIMPreeditPosition) {
  87                 XPoint spot;
  88                 XRectangle rect;
  89                 int ofs;
  90
  91                 ofs = (view->size.height - WMFontHeight(scr->normalFont)) / 2;
  92
  93                 rect.x = ofs;
  94                 rect.y = ofs;
  95                 rect.height = WMFontHeight(scr->normalFont);
  96                 rect.width = view->size.width - ofs * 2;
  97                 spot.x = rect.x;
  98                 spot.y = rect.y + rect.height;
  99
 100                 // this really needs to be changed, but I don't know how yet -Dan
 101                 // it used to be like this with fontsets, but no longer applies to xft
 102                 preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &spot,
 103                                                    XNArea, &rect, XNFontInfo, scr->normalFont->font, NULL);
 104         }
 105
 106         view->xic = XCreateIC(scr->imctx->xim, XNInputStyle, scr->imctx->ximstyle,
 107                               XNClientWindow, view->window,
 108                               preedit_attr ? XNPreeditAttributes : NULL, preedit_attr, NULL);
 109
 110         if (preedit_attr)
 111                 XFree(preedit_attr);
 112
 113         if (view->xic) {
 114                 unsigned long fevent = 0;
 115                 XGetICValues(view->xic, XNFilterEvents, &fevent, NULL);
 116                 XSelectInput(scr->display, view->window,
 117                              ButtonPressMask | ButtonReleaseMask | ExposureMask |
 118                              KeyPressMask | FocusChangeMask | ButtonMotionMask | fevent);
 119         }
 120 }
 121
 122 void W_DestroyIC(WMView * view)
 123 {
 124         if (view->xic) {
 125                 XDestroyIC(view->xic);
 126                 view->xic = 0;
 127         }
 128 }
 129
 130 static void setPreeditArea(W_View * view)
 131 {
 132         WMScreen *scr = W_VIEW_SCREEN(view);
 133         XVaNestedList preedit_attr = NULL;
 134
 135         if (view->xic && (scr->imctx->ximstyle & XIMPreeditPosition)) {
 136                 XRectangle rect;
 137                 int ofs;
 138
 139                 ofs = (view->size.height - WMFontHeight(scr->normalFont)) / 2;
 140                 rect.x = ofs;
 141                 rect.y = ofs;
 142                 rect.height = WMFontHeight(scr->normalFont);
 143                 rect.width = view->size.width - ofs * 2;
 144
 145                 preedit_attr = XVaCreateNestedList(0, XNArea, &rect, NULL);
 146                 XSetICValues(view->xic, XNPreeditAttributes, preedit_attr, NULL);
 147
 148                 if (preedit_attr) {
 149                         XFree(preedit_attr);
 150                 }
 151         }
 152 }
 153
 154 void W_FocusIC(WMView * view)
 155 {
 156         WMScreen *scr = W_VIEW_SCREEN(view);
 157
 158         if (view->xic) {
 159                 XSetICFocus(view->xic);
 160                 XSetICValues(view->xic, XNFocusWindow, view->window, NULL);
 161
 162                 if (scr->imctx->ximstyle & XIMPreeditPosition) {
 163                         setPreeditArea(view);
 164                 }
 165         }
 166 }
 167
 168 void W_UnFocusIC(WMView * view)
 169 {
 170         if (view->xic) {
 171                 XUnsetICFocus(view->xic);
 172         }
 173 }
 174
 175 void W_SetPreeditPositon(W_View * view, int x, int y)
 176 {
 177         WMScreen *scr = W_VIEW_SCREEN(view);
 178         XVaNestedList preedit_attr = NULL;
 179
 180         if (view->xic && (scr->imctx->ximstyle & XIMPreeditPosition)) {
 181                 XPoint spot;
 182                 int ofs;
 183
 184                 ofs = (view->size.height - WMFontHeight(scr->normalFont)) / 2;
 185                 spot.x = x;
 186                 spot.y = y + view->size.height - ofs - 3;
 187                 preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &spot, NULL);
 188                 XSetICValues(view->xic, XNPreeditAttributes, preedit_attr, NULL);
 189                 if (preedit_attr) {
 190                         XFree(preedit_attr);
 191                 }
 192         }
 193 }
 194
 195 int
 196 W_LookupString(W_View * view, XKeyPressedEvent * event, char *buffer, int buflen, KeySym * keysym, Status * status)
 197 {
 198         WMScreen *scr = W_VIEW_SCREEN(view);
 199
 200         XSetInputFocus(scr->display, view->window, RevertToParent, CurrentTime);
 201
 202         if (view->xic) {
 203 #ifdef X_HAVE_UTF8_STRING
 204                 return Xutf8LookupString(view->xic, event, buffer, buflen, keysym, status);
 205 #else
 206                 return XLookupString(event, buffer, buflen, keysym, (XComposeStatus *) status);
 207 #endif
 208         } else {
 209                 return XLookupString(event, buffer, buflen, keysym, (XComposeStatus *) status);
 210         }
 211 }