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-rwxr-xr-xlibvncserver/selbox.c301
1 files changed, 301 insertions, 0 deletions
diff --git a/libvncserver/selbox.c b/libvncserver/selbox.c
new file mode 100755
index 0000000..8d76e23
--- /dev/null
+++ b/libvncserver/selbox.c
@@ -0,0 +1,301 @@
+#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);
+}
+
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-11 03:22:59 +0000