Shared TDE VNC library sources
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libtdevnc/libvncserver/selbox.c

300 lines
8.7 KiB

#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 NULL;
}
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;
rfbKbdAddEventProcPtr kbdAddEventBackup = rfbScreen->kbdAddEvent;
rfbPtrAddEventProcPtr ptrAddEventBackup = rfbScreen->ptrAddEvent;
rfbGetCursorProcPtr getCursorPtrBackup = rfbScreen->getCursorPtr;
rfbDisplayHookPtr 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;
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 = NULL;
/* 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);
}