ioncore/selection.c

   1 /*
   2  * ion/ioncore/selection.c
   3  *
   4  * Copyright (c) Tuomo Valkonen 1999-2009.
   5  *
   6  * See the included file LICENSE for details.
   7  */
   8
   9 #include <X11/Xmd.h>
  10 #include <string.h>
  11
  12 #include "common.h"
  13 #include "global.h"
  14 #include "property.h"
  15 #include "xwindow.h"
  16 #include <libextl/extl.h>
  17
  18
  19 static char *selection_data=NULL;
  20 static int selection_length;
  21 static bool continuation_set=FALSE;
  22 static ExtlFn continuation;
  23
  24 #define CLIPATOM(X) XA_PRIMARY
  25
  26 static Atom XA_COMPOUND_TEXT(Display *unused)
  27 {
  28     static Atom a=None;
  29
  30     if(a==None)
  31         a=XInternAtom(ioncore_g.dpy, "COMPOUND_TEXT", False);
  32
  33     return a;
  34 }
  35
  36
  37 void ioncore_handle_selection_request(XSelectionRequestEvent *ev)
  38 {
  39     XSelectionEvent sev;
  40     XTextProperty prop;
  41     const char *p[1];
  42     bool ok=FALSE;
  43
  44     sev.property=None;
  45
  46     if(selection_data==NULL || ev->property==None)
  47         goto refuse;
  48
  49     p[0]=selection_data;
  50
  51     if(!ioncore_g.use_mb && ev->target==XA_STRING){
  52         Status st=XStringListToTextProperty((char **)p, 1, &prop);
  53         ok=(st!=0);
  54     }else if(ioncore_g.use_mb){
  55         XICCEncodingStyle style;
  56
  57         if(ev->target==XA_STRING){
  58             style=XStringStyle;
  59             ok=TRUE;
  60         }else if(ev->target==XA_COMPOUND_TEXT(ioncore_g.dpy)){
  61             style=XCompoundTextStyle;
  62             ok=TRUE;
  63         }
  64
  65         if(ok){
  66             int st=XmbTextListToTextProperty(ioncore_g.dpy, (char **)p, 1,
  67                                              style, &prop);
  68             ok=(st>=0);
  69         }
  70     }
  71
  72     if(ok){
  73         XSetTextProperty(ioncore_g.dpy, ev->requestor, &prop, ev->property);
  74         sev.property=ev->property;
  75         XFree(prop.value);
  76     }
  77
  78 refuse:
  79     sev.type=SelectionNotify;
  80     sev.requestor=ev->requestor;
  81     sev.selection=ev->selection;
  82     sev.target=ev->target;
  83     sev.time=ev->time;
  84     XSendEvent(ioncore_g.dpy, ev->requestor, False, 0L, (XEvent*)&sev);
  85 }
  86
  87
  88 static void ins(Window win, const char *str, int n)
  89 {
  90     if(!continuation_set){
  91         WWindow *wwin=XWINDOW_REGION_OF_T(win, WWindow);
  92         if(wwin)
  93             window_insstr(wwin, str, n);
  94     }else{
  95         char *tmp=scopyn(str, n);
  96         if(tmp!=NULL){
  97             extl_call(continuation, "s", NULL, tmp);
  98             free(tmp);
  99         }
 100     }
 101 }
 102
 103
 104 static void insert_selection(Window win, Atom prop)
 105 {
 106     char **p=xwindow_get_text_property(win, prop, NULL);
 107     if(p!=NULL){
 108         ins(win, p[0], strlen(p[0]));
 109         XFreeStringList(p);
 110     }
 111 }
 112
 113
 114 void ioncore_handle_selection(XSelectionEvent *ev)
 115 {
 116     Atom prop=ev->property;
 117     Window win=ev->requestor;
 118
 119     if(prop!=None){
 120         insert_selection(win, prop);
 121         XDeleteProperty(ioncore_g.dpy, win, prop);
 122     }
 123
 124     if(continuation_set){
 125         extl_unref_fn(continuation);
 126         continuation_set=FALSE;
 127     }
 128 }
 129
 130
 131 void ioncore_clear_selection()
 132 {
 133     if(selection_data!=NULL){
 134         free(selection_data);
 135         selection_data=NULL;
 136     }
 137 }
 138
 139
 140 void ioncore_set_selection_n(const char *p, int n)
 141 {
 142     if(selection_data!=NULL)
 143         free(selection_data);
 144
 145     selection_data=ALLOC_N(char, n+1);
 146
 147     if(selection_data==NULL)
 148         return;
 149
 150     memcpy(selection_data, p, n);
 151     selection_data[n]='\0';
 152     selection_length=n;
 153
 154     XSetSelectionOwner(ioncore_g.dpy, CLIPATOM(ioncore_g.dpy),
 155                        DefaultRootWindow(ioncore_g.dpy),
 156                        CurrentTime);
 157 }
 158
 159
 160 /*EXTL_DOC
 161  * Set primary selection and cutbuffer0 to \var{p}.
 162  */
 163 EXTL_EXPORT
 164 void ioncore_set_selection(const char *p)
 165 {
 166     if(p==NULL)
 167         ioncore_clear_selection();
 168     else
 169         ioncore_set_selection_n(p, strlen(p));
 170 }
 171
 172
 173 void ioncore_request_selection_for(Window win)
 174 {
 175     Atom a=XA_STRING;
 176
 177     if(continuation_set){
 178         extl_unref_fn(continuation);
 179         continuation_set=FALSE;
 180     }
 181
 182     if(ioncore_g.use_mb)
 183         a=XA_COMPOUND_TEXT(ioncore_g.dpy);
 184
 185     XConvertSelection(ioncore_g.dpy, CLIPATOM(ioncore_g.dpy), a,
 186                       ioncore_g.atom_selection, win, CurrentTime);
 187 }
 188
 189
 190 /*EXTL_DOC
 191  * Request (string) selection. The function \var{fn} will be called
 192  * with the selection when and if it is received.
 193  */
 194 EXTL_EXPORT
 195 void ioncore_request_selection(ExtlFn fn)
 196 {
 197     assert(ioncore_g.rootwins!=NULL);
 198     ioncore_request_selection_for(ioncore_g.rootwins->dummy_win);
 199     continuation=extl_ref_fn(fn);
 200     continuation_set=TRUE;
 201 }
 202