summaryrefslogtreecommitdiffstats
path: root/selbox.c
blob: 8d76e23654374c6fecb2f8627834406f7363010b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
#include <ctype.h>
#include <rfb/rfb.h>
#include <rfb/keysym.h>

typedef struct {
  rfbScreenInfoPtr screen;
  rfbFontDataPtr font;
  char** list;
  int listSize;
  int selected;
  int displayStart;
  int x1,y1,x2,y2,textH,pageH;
  int xhot,yhot;
  int buttonWidth,okBX,cancelBX,okX,cancelX,okY;
  rfbBool okInverted,cancelInverted;
  int lastButtons;
  rfbPixel colour,backColour;
  SelectionChangedHookPtr selChangedHook;
  enum { SELECTING, OK, CANCEL } state;
} rfbSelectData;

static const char* okStr="OK";
static const char* cancelStr="Cancel";

static void selPaintButtons(rfbSelectData* m,rfbBool invertOk,rfbBool invertCancel)
{
  rfbScreenInfoPtr s = m->screen;
  rfbPixel bcolour = m->backColour;
  rfbPixel colour = m->colour;

  rfbFillRect(s,m->x1,m->okY-m->textH,m->x2,m->okY,bcolour);

  if(invertOk) {
    rfbFillRect(s,m->okBX,m->okY-m->textH,m->okBX+m->buttonWidth,m->okY,colour);
    rfbDrawStringWithClip(s,m->font,m->okX+m->xhot,m->okY-1+m->yhot,okStr,
			  m->x1,m->okY-m->textH,m->x2,m->okY,
			  bcolour,colour);
  } else
    rfbDrawString(s,m->font,m->okX+m->xhot,m->okY-1+m->yhot,okStr,colour);
    
  if(invertCancel) {
    rfbFillRect(s,m->cancelBX,m->okY-m->textH,
	     m->cancelBX+m->buttonWidth,m->okY,colour);
    rfbDrawStringWithClip(s,m->font,m->cancelX+m->xhot,m->okY-1+m->yhot,
			  cancelStr,m->x1,m->okY-m->textH,m->x2,m->okY,
			  bcolour,colour);
  } else
    rfbDrawString(s,m->font,m->cancelX+m->xhot,m->okY-1+m->yhot,cancelStr,colour);

  m->okInverted = invertOk;
  m->cancelInverted = invertCancel;
}

/* line is relative to displayStart */
static void selPaintLine(rfbSelectData* m,int line,rfbBool invert)
{
  int y1 = m->y1+line*m->textH, y2 = y1+m->textH;
  if(y2>m->y2)
    y2=m->y2;
  rfbFillRect(m->screen,m->x1,y1,m->x2,y2,invert?m->colour:m->backColour);
  if(m->displayStart+line<m->listSize)
    rfbDrawStringWithClip(m->screen,m->font,m->x1+m->xhot,y2-1+m->yhot,
			  m->list[m->displayStart+line],
			  m->x1,y1,m->x2,y2,
			  invert?m->backColour:m->colour,
			  invert?m->backColour:m->colour);
}

static void selSelect(rfbSelectData* m,int _index)
{
  int delta;

  if(_index==m->selected || _index<0 || _index>=m->listSize)
    return;

  if(m->selected>=0)
    selPaintLine(m,m->selected-m->displayStart,FALSE);

  if(_index<m->displayStart || _index>=m->displayStart+m->pageH) {
    /* targetLine is the screen line in which the selected line will
       be displayed.
       targetLine = m->pageH/2 doesn't look so nice */
    int targetLine = m->selected-m->displayStart;
    int lineStart,lineEnd;

    /* scroll */
    if(_index<targetLine)
      targetLine = _index;
    else if(_index+m->pageH-targetLine>=m->listSize)
      targetLine = _index+m->pageH-m->listSize;
    delta = _index-(m->displayStart+targetLine);

    if(delta>-m->pageH && delta<m->pageH) {
      if(delta>0) {
	lineStart = m->pageH-delta;
	lineEnd = m->pageH;
	rfbDoCopyRect(m->screen,m->x1,m->y1,m->x2,m->y1+lineStart*m->textH,
		      0,-delta*m->textH);
      } else {
	lineStart = 0;
	lineEnd = -delta;
	rfbDoCopyRect(m->screen,
		      m->x1,m->y1+lineEnd*m->textH,m->x2,m->y2,
		      0,-delta*m->textH);
      }
    } else {
      lineStart = 0;
      lineEnd = m->pageH;
    }
    m->displayStart += delta;
    for(delta=lineStart;delta<lineEnd;delta++)
      if(delta!=_index)
	selPaintLine(m,delta,FALSE);
  }

  m->selected = _index;
  selPaintLine(m,m->selected-m->displayStart,TRUE);

  if(m->selChangedHook)
    m->selChangedHook(_index);

  /* todo: scrollbars */
}

static void selKbdAddEvent(rfbBool down,rfbKeySym keySym,rfbClientPtr cl)
{
  if(down) {
    if(keySym>' ' && keySym<0xff) {
      int i;
      rfbSelectData* m = (rfbSelectData*)cl->screen->screenData;
      char c = tolower(keySym);

      for(i=m->selected+1;m->list[i] && tolower(m->list[i][0])!=c;i++);
      if(!m->list[i])
	for(i=0;i<m->selected && tolower(m->list[i][0])!=c;i++);
      selSelect(m,i);
    } else if(keySym==XK_Escape) {
      rfbSelectData* m = (rfbSelectData*)cl->screen->screenData;
      m->state = CANCEL;
    } else if(keySym==XK_Return) {
      rfbSelectData* m = (rfbSelectData*)cl->screen->screenData;
      m->state = OK;
    } else {
      rfbSelectData* m = (rfbSelectData*)cl->screen->screenData;
      int curSel=m->selected;
      if(keySym==XK_Up) {
	if(curSel>0)
	  selSelect(m,curSel-1);
      } else if(keySym==XK_Down) {
	if(curSel+1<m->listSize)
	  selSelect(m,curSel+1);
      } else {
	if(keySym==XK_Page_Down) {
	  if(curSel+m->pageH<m->listSize)
	    selSelect(m,curSel+m->pageH);
	  else
	    selSelect(m,m->listSize-1);
	} else if(keySym==XK_Page_Up) {
	  if(curSel-m->pageH>=0)
	    selSelect(m,curSel-m->pageH);
	  else
	    selSelect(m,0);
	}
      }
    }
  }
}

static void selPtrAddEvent(int buttonMask,int x,int y,rfbClientPtr cl)
{
  rfbSelectData* m = (rfbSelectData*)cl->screen->screenData;
  if(y<m->okY && y>=m->okY-m->textH) {
    if(x>=m->okBX && x<m->okBX+m->buttonWidth) {
      if(!m->okInverted)
	selPaintButtons(m,TRUE,FALSE);
      if(buttonMask)
	m->state = OK;
    } else if(x>=m->cancelBX && x<m->cancelBX+m->buttonWidth) {
      if(!m->cancelInverted)
	selPaintButtons(m,FALSE,TRUE);
      if(buttonMask)
	m->state = CANCEL;
    } else if(m->okInverted || m->cancelInverted)
      selPaintButtons(m,FALSE,FALSE);
  } else {
    if(m->okInverted || m->cancelInverted)
      selPaintButtons(m,FALSE,FALSE);
    if(!m->lastButtons && buttonMask) {
      if(x>=m->x1 && x<m->x2 && y>=m->y1 && y<m->y2)
	selSelect(m,m->displayStart+(y-m->y1)/m->textH);
    }
  }
  m->lastButtons = buttonMask;

  /* todo: scrollbars */
}

static rfbCursorPtr selGetCursorPtr(rfbClientPtr cl)
{
  return(0);
}

int rfbSelectBox(rfbScreenInfoPtr rfbScreen,rfbFontDataPtr font,
		 char** list,
		 int x1,int y1,int x2,int y2,
		 rfbPixel colour,rfbPixel backColour,
		 int border,SelectionChangedHookPtr selChangedHook)
{
   int bpp = rfbScreen->bitsPerPixel/8;
   char* frameBufferBackup;
   void* screenDataBackup = rfbScreen->screenData;
   KbdAddEventProcPtr kbdAddEventBackup = rfbScreen->kbdAddEvent;
   PtrAddEventProcPtr ptrAddEventBackup = rfbScreen->ptrAddEvent;
   GetCursorProcPtr getCursorPtrBackup = rfbScreen->getCursorPtr;
   DisplayHookPtr displayHookBackup = rfbScreen->displayHook;
   rfbSelectData selData;
   int i,j,k;
   int fx1,fy1,fx2,fy2; /* for font bbox */

   if(list==0 || *list==0)
     return(-1);
   
   rfbWholeFontBBox(font, &fx1, &fy1, &fx2, &fy2);
   selData.textH = fy2-fy1;
   /* I need at least one line for the choice and one for the buttons */
   if(y2-y1<selData.textH*2+3*border)
     return(-1);
   selData.xhot = -fx1;
   selData.yhot = -fy2;
   selData.x1 = x1+border;
   selData.y1 = y1+border;
   selData.y2 = y2-selData.textH-3*border;
   selData.x2 = x2-2*border;
   selData.pageH = (selData.y2-selData.y1)/selData.textH;

   i = rfbWidthOfString(font,okStr);
   j = rfbWidthOfString(font,cancelStr);
   selData.buttonWidth= k = 4*border+(i<j)?j:i;
   selData.okBX = x1+(x2-x1-2*k)/3;
   if(selData.okBX<x1+border) /* too narrow! */
     return(-1);
   selData.cancelBX = x1+k+(x2-x1-2*k)*2/3;
   selData.okX = selData.okBX+(k-i)/2;
   selData.cancelX = selData.cancelBX+(k-j)/2;
   selData.okY = y2-border;

   rfbUndrawCursor(rfbScreen);
   frameBufferBackup = (char*)malloc(bpp*(x2-x1)*(y2-y1));

   selData.state = SELECTING;
   selData.screen = rfbScreen;
   selData.font = font;
   selData.list = list;
   selData.colour = colour;
   selData.backColour = backColour;
   for(i=0;list[i];i++);
   selData.selected = i;
   selData.listSize = i;
   selData.displayStart = i;
   selData.lastButtons = 0;
   selData.selChangedHook = selChangedHook;
   
   rfbScreen->screenData = &selData;
   rfbScreen->kbdAddEvent = selKbdAddEvent;
   rfbScreen->ptrAddEvent = selPtrAddEvent;
   rfbScreen->getCursorPtr = selGetCursorPtr;
   rfbScreen->displayHook = 0;
   
   /* backup screen */
   for(j=0;j<y2-y1;j++)
     memcpy(frameBufferBackup+j*(x2-x1)*bpp,
	    rfbScreen->frameBuffer+j*rfbScreen->paddedWidthInBytes+x1*bpp,
	    (x2-x1)*bpp);

   /* paint list and buttons */
   rfbFillRect(rfbScreen,x1,y1,x2,y2,colour);
   selPaintButtons(&selData,FALSE,FALSE);
   selSelect(&selData,0);

   /* modal loop */
   while(selData.state == SELECTING)
     rfbProcessEvents(rfbScreen,20000);

   /* copy back screen data */
   for(j=0;j<y2-y1;j++)
     memcpy(rfbScreen->frameBuffer+j*rfbScreen->paddedWidthInBytes+x1*bpp,
	    frameBufferBackup+j*(x2-x1)*bpp,
	    (x2-x1)*bpp);
   free(frameBufferBackup);
   rfbMarkRectAsModified(rfbScreen,x1,y1,x2,y2);
   rfbScreen->screenData = screenDataBackup;
   rfbScreen->kbdAddEvent = kbdAddEventBackup;
   rfbScreen->ptrAddEvent = ptrAddEventBackup;
   rfbScreen->getCursorPtr = getCursorPtrBackup;
   rfbScreen->displayHook = displayHookBackup;

   if(selData.state==CANCEL)
     selData.selected=-1;
   return(selData.selected);
}

OpenPOWER on IntegriCloud