WINGs/winputmethod.c

   1
   2
   3 #include <X11/Xlib.h>
   4
   5 #include "WINGsP.h"
   6
   7
   8 typedef struct W_IMContext {
   9     XIM xim;
  10     XIMStyle ximstyle;
  11 } WMIMContext;
  12
  13
  14
  15 static void
  16 instantiateIM_cb(Display *display, XPointer client_data, XPointer call_data)
  17 {
  18     W_InitIM((W_Screen *)client_data);
  19 }
  20
  21
  22 static void
  23 destroyIM_cb(XIM xim, XPointer client_data, XPointer call_data)
  24 {
  25     W_Screen *scr = (W_Screen *)client_data;
  26     W_View *target;
  27
  28     if (scr->imctx->xim != xim)
  29         return;
  30
  31     target = scr->rootView->childrenList;
  32     while (target!=NULL) {
  33         W_DestroyIC(target);
  34         target = target->nextSister;
  35     }
  36
  37     wfree(scr->imctx);
  38     scr->imctx = NULL;
  39
  40     XRegisterIMInstantiateCallback(scr->display, NULL, NULL, NULL,
  41                                    instantiateIM_cb, (XPointer)scr);
  42 }
  43
  44
  45 void
  46 W_InitIM(W_Screen *scr)
  47 {
  48     XIM xim;
  49
  50     if (scr->imctx)
  51         return;
  52
  53     xim = XOpenIM(scr->display, NULL, NULL, NULL);
  54
  55     if (xim) {
  56         XIMStyles *im_styles;
  57         XIMCallback cb;
  58         int i;
  59
  60         scr->imctx = wmalloc(sizeof(WMIMContext));
  61         scr->imctx->xim = xim;
  62
  63         cb.callback = destroyIM_cb;
  64         cb.client_data = (XPointer)scr;
  65         if (XSetIMValues(scr->imctx->xim, XNDestroyCallback, &cb, NULL))
  66             wwarning("could not add destroy callback for input method");
  67         XUnregisterIMInstantiateCallback(scr->display, NULL, NULL, NULL,
  68                                          instantiateIM_cb, (XPointer)scr);
  69         /* Get available input style */
  70         XGetIMValues(scr->imctx->xim, XNQueryInputStyle, &im_styles, NULL);
  71
  72         scr->imctx->ximstyle = 0;
  73
  74         for (i=0; i<im_styles->count_styles && scr->imctx->ximstyle==0; i++) {
  75             if ((im_styles->supported_styles[i] & XIMPreeditPosition) &&
  76                 (im_styles->supported_styles[i] & XIMStatusNothing)) {
  77                 scr->imctx->ximstyle = XIMPreeditPosition | XIMStatusNothing;
  78             } else if ((im_styles->supported_styles[i] & XIMPreeditNothing) &&
  79                        (im_styles->supported_styles[i] & XIMStatusNothing)) {
  80                 scr->imctx->ximstyle = XIMPreeditNothing | XIMStatusNothing;
  81             }
  82         }
  83         XFree(im_styles);
  84     } else {
  85         XRegisterIMInstantiateCallback(scr->display, NULL, NULL, NULL,
  86                                        instantiateIM_cb, (XPointer)scr);
  87     }
  88 }
  89
  90
  91 void
  92 W_CreateIC(WMView *view)
  93 {
  94     WMScreen *scr = W_VIEW_SCREEN(view);
  95     XVaNestedList preedit_attr = NULL;
  96
  97     if (view->xic || !view->flags.realized || !scr->imctx)
  98         return;
  99
 100     if (scr->imctx->ximstyle & XIMPreeditPosition) {
 101         XPoint spot;
 102         XRectangle rect;
 103         int ofs;
 104
 105         ofs = (view->size.height - WMFontHeight(scr->normalFont))/2;
 106
 107         rect.x = ofs;
 108         rect.y = ofs;
 109         rect.height = WMFontHeight(scr->normalFont);
 110         rect.width = view->size.width - ofs*2;
 111         spot.x = rect.x;
 112         spot.y = rect.y + rect.height;
 113
 114         // this really needs to be changed, but I don't know how yet -Dan
 115         // it used to be like this with fontsets, but no longer applies to xft
 116         preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &spot,
 117                                            XNArea, &rect, XNFontInfo,
 118                                            scr->normalFont->font, NULL);
 119     }
 120
 121     view->xic = XCreateIC(scr->imctx->xim, XNInputStyle, scr->imctx->ximstyle,
 122                           XNClientWindow, view->window,
 123                           preedit_attr ? XNPreeditAttributes : NULL, preedit_attr,
 124                           NULL);
 125
 126     if (preedit_attr)
 127         XFree(preedit_attr);
 128
 129     if (view->xic) {
 130         unsigned long fevent = 0;
 131         XGetICValues(view->xic, XNFilterEvents, &fevent, NULL);
 132         XSelectInput(scr->display, view->window,
 133                      ButtonPressMask | ButtonReleaseMask | ExposureMask |
 134                      KeyPressMask | FocusChangeMask| ButtonMotionMask |fevent);
 135     }
 136 }
 137
 138
 139 void
 140 W_DestroyIC(WMView *view)
 141 {
 142     if (view->xic) {
 143         XDestroyIC(view->xic);
 144         view->xic = 0;
 145     }
 146 }
 147
 148
 149 static void
 150 setPreeditArea(W_View *view)
 151 {
 152     WMScreen *scr = W_VIEW_SCREEN(view);
 153     XVaNestedList preedit_attr = NULL;
 154
 155     if (view->xic && (scr->imctx->ximstyle & XIMPreeditPosition)) {
 156         XRectangle rect;
 157         int ofs;
 158
 159         ofs = (view->size.height - WMFontHeight(scr->normalFont))/2;
 160         rect.x = ofs;
 161         rect.y = ofs;
 162         rect.height = WMFontHeight(scr->normalFont);
 163         rect.width = view->size.width - ofs*2;
 164
 165         preedit_attr = XVaCreateNestedList(0, XNArea, &rect, NULL);
 166         XSetICValues(view->xic, XNPreeditAttributes, preedit_attr, NULL);
 167
 168         if (preedit_attr) {
 169             XFree(preedit_attr);
 170         }
 171     }
 172 }
 173
 174
 175 void
 176 W_FocusIC(WMView *view)
 177 {
 178     WMScreen *scr = W_VIEW_SCREEN(view);
 179
 180     if (view->xic) {
 181         XSetICFocus(view->xic);
 182         XSetICValues(view->xic, XNFocusWindow, view->window, NULL);
 183
 184         if (scr->imctx->ximstyle & XIMPreeditPosition) {
 185             setPreeditArea(view);
 186         }
 187     }
 188 }
 189
 190
 191 void
 192 W_UnFocusIC(WMView *view)
 193 {
 194     if (view->xic) {
 195         XUnsetICFocus(view->xic);
 196     }
 197 }
 198
 199
 200 void
 201 W_SetPreeditPositon(W_View *view, int x, int y)
 202 {
 203     WMScreen *scr = W_VIEW_SCREEN(view);
 204     XVaNestedList preedit_attr = NULL;
 205
 206     if (view->xic && (scr->imctx->ximstyle & XIMPreeditPosition)) {
 207         XPoint spot;
 208         int ofs;
 209
 210         ofs = (view->size.height - WMFontHeight(scr->normalFont))/2;
 211         spot.x = x;
 212         spot.y = y + view->size.height - ofs - 3;
 213         preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &spot, NULL);
 214         XSetICValues(view->xic, XNPreeditAttributes, preedit_attr, NULL);
 215         if (preedit_attr) {
 216             XFree(preedit_attr);
 217         }
 218     }
 219 }
 220
 221
 222 int
 223 W_LookupString(W_View *view, XKeyPressedEvent *event, char *buffer, int buflen,
 224                KeySym *keysym, Status *status)
 225 {
 226     WMScreen *scr = W_VIEW_SCREEN(view);
 227
 228     XSetInputFocus(scr->display, view->window, RevertToParent, CurrentTime);
 229
 230     if (view->xic) {
 231 #ifdef X_HAVE_UTF8_STRING
 232         return Xutf8LookupString(view->xic, event, buffer, buflen, keysym, status);
 233 #else
 234         return XLookupString(event, buffer, buflen, keysym, (XComposeStatus *)status);
 235 #endif
 236     } else {
 237         return XLookupString(event, buffer, buflen, keysym, (XComposeStatus *)status);
 238     }
 239 }
 240
 241