gvpm.c

GSview 4.6 PostScript previewer。Ghostscript在MS-Windows, OS/2 and Unix下的图形化接口

			WinSendMsg(hwndScroll, SBM_SETTHUMBSIZE, 
			    MPFROM2SHORT(1, 1), MPFROMLONG(0));
		}

		if (!fullscreen && option.fit_page && image.open &&
			(cxAdjust!=0 || cyAdjust!=0) ) {
		        SWP swp;
			/* don't interrogate the window location immediately since */
			/* it causes the Diamond Stealth VL24 with IBM S3 drivers */
			/* to corrupt the display */
			DosSleep(50);
		        WinQueryWindowPos(WinQueryWindow(hwnd, QW_PARENT), &swp);
		        WinSetWindowPos(WinQueryWindow(hwnd, QW_PARENT), 0, 
			    swp.x, swp.y - cyAdjust,
			    swp.cx + cxAdjust, swp.cy + cyAdjust, SWP_SIZE | SWP_MOVE);
		        cxAdjust = cyAdjust = 0;
		}
		display.offset.x = -cxAdjust/2;
		display.offset.y = -cyAdjust/2;
	    	if (!fullscreen && hwnd_frame) {
		    SWP swp;
		    WinQueryWindowPos(WinQueryWindow(hwnd, QW_PARENT), &swp);
		    if (!(swp.fl & SWP_MINIMIZE)) {
			if (!(swp.fl & SWP_MAXIMIZE)) {
		            option.img_size.x = swp.cx;
		            option.img_size.y = swp.cy;
			}
		        option.img_max = ((swp.fl & SWP_MAXIMIZE) != 0);
		    }
		}
		fit_page_enabled = FALSE;
		break;
	case WM_VSCROLL:
	    if (!image.open)
		break;
	    switch(SHORT2FROMMP(mp2)) {
		case SB_LINEUP:
			nVscrollInc = -cyClient/16;
			break;
		case SB_LINEDOWN:
			nVscrollInc = cyClient/16;
			break;
		case SB_PAGEUP:
			nVscrollInc = min(-1,-cyClient);
			break;
		case SB_PAGEDOWN:
			nVscrollInc = max(1,cyClient);
			break;
#ifdef NOTUSED
		case SB_SLIDERTRACK:
		    /* only do this for fast redraw modes */
		    /* these are 8bit/pixel and 1bit/pixel */
	            if ( (bitmap.depth == 1) ||
		       ((bitmap.depth == 8) && display.hasPalMan && display.hpal_exists) ) {
			nVscrollInc = SHORT1FROMMP(mp2) - nVscrollPos;
		    }
		    else
			nVscrollInc = 0;
#endif
		case SB_SLIDERPOSITION:
			nVscrollInc = SHORT1FROMMP(mp2) - nVscrollPos;
			break;
		case SB_TOP:
			nVscrollInc = -nVscrollPos;
			break;
		case SB_BOTTOM:
			nVscrollInc = nVscrollMax - nVscrollPos;
			break;
		case SB_FIND:
			nVscrollInc = (short)SHORT1FROMMP(mp2);
			break;
		default:
			nVscrollInc = 0;
	    }
	    if ((nVscrollInc = max(-nVscrollPos, 
		min(nVscrollInc, nVscrollMax - nVscrollPos)))!=0) {
		LONG lComplexity;
	        HPOINTER hptr;
		hwndScroll = WinWindowFromID(WinQueryWindow(hwnd, QW_PARENT), FID_VERTSCROLL);
		nVscrollPos += nVscrollInc;
		scroll_pos.y = nVscrollMax - nVscrollPos;
/* KLUDGE BEGIN */
		/* remove pointer to cope with buggy display drivers */
		hptr = WinQueryPointer(HWND_DESKTOP);
		WinSetPointer(HWND_DESKTOP, 0);
/* KLUDGE END */
		lComplexity = WinScrollWindow(hwnd, 0, nVscrollInc, (PRECTL)NULL, (PRECTL)NULL, 
			(HRGN)NULLHANDLE, (PRECTL)&rect, 0);
/* KLUDGE BEGIN */
		/* restore pointer after we removed it */
		WinSetPointer(HWND_DESKTOP, hptr);
/* KLUDGE END */
		WinSendMsg(hwndScroll, SBM_SETPOS, MPFROMLONG(nVscrollPos), 0);
		if (lComplexity != RGN_RECT) {
		    WinInvalidateRect(hwnd, (PRECTL)NULL, FALSE);
		    WinUpdateWindow(hwnd);
		}
		else {
		    /* redraw exposed area */
		    hps = WinGetPS(hwnd);
	            if ((bitmap.depth == 8) && display.hasPalMan && display.hpal_exists) {
	                GpiSelectPalette(hps, display.hpal);
                        WinRealizePalette(hwnd, hps, &ulclr);
		        paint_bitmap(hps, &rect, nHscrollPos, nVscrollMax - nVscrollPos);
	                GpiSelectPalette(hps, (HPAL)NULL);
	            }
		    else
		        paint_bitmap(hps, &rect, nHscrollPos, nVscrollMax - nVscrollPos);
		    WinValidateRect(hwnd, &rect, FALSE);
		    WinReleasePS(hps);
		}
	    }
	    else if (gsdll.state != GS_IDLE) {
		/* We are at the top or bottom of the 
		 * scroll range.  Change page if 
		 * PageUp or PageDown pressed. */
		int numpages = 0;
		request_mutex();
		if (psfile.dsc != (CDSC *)NULL)
		    numpages = psfile.dsc->page_count;
		release_mutex();
		switch(SHORT2FROMMP(mp2)) {
		    case SB_PAGEUP:
		      if ((psfile.dsc != (CDSC *)NULL)
			    && (psfile.pagenum != 1)) {
			WinSendMsg(hwnd, WM_VSCROLL, MPFROMLONG(0), 
				MPFROM2SHORT(0, SB_BOTTOM));
			gsview_command(IDM_PREV);
		      }
		      break;
		    case SB_PAGEDOWN:
		      if ((psfile.dsc == (CDSC *)NULL)
			    || (psfile.pagenum < numpages)) {
			WinSendMsg(hwnd, WM_VSCROLL, MPFROMLONG(0), 
				MPFROM2SHORT(0, SB_TOP));
			gsview_command(IDM_NEXT);
		      }
		      break;
		}
	    }
	    break;
	case WM_HSCROLL:
	    if (!image.open)
		break;
	    switch(SHORT2FROMMP(mp2)) {
		case SB_LINELEFT:
			nHscrollInc = -cxClient/16;
			break;
		case SB_LINERIGHT:
			nHscrollInc = cyClient/16;
			break;
		case SB_PAGELEFT:
			nHscrollInc = min(-1,-cxClient);
			break;
		case SB_PAGERIGHT:
			nHscrollInc = max(1,cxClient);
			break;
#ifdef NOTUSED
		case SB_SLIDERTRACK:
		    /* only do this for fast redraw modes */
		    /* these are 8bit/pixel and 1bit/pixel */
	            if ( (bitmap.depth == 1) ||
		       ((bitmap.depth == 8) && display.hasPalMan && display.hpal_exists) ) {
			nHscrollInc = SHORT1FROMMP(mp2) - nHscrollPos;
		    }
		    else
			nHscrollInc = 0;
#endif
		case SB_SLIDERPOSITION:
			nHscrollInc = SHORT1FROMMP(mp2) - nHscrollPos;
			break;
		case SB_TOP:
			nHscrollInc = -nHscrollPos;
			break;
		case SB_BOTTOM:
			nHscrollInc = nHscrollMax - nHscrollPos;
			break;
		case SB_FIND:
			nHscrollInc = (short)SHORT1FROMMP(mp2);
			break;
		default:
			nHscrollInc = 0;
	    }
	    if ((nHscrollInc = max(-nHscrollPos, 
		min(nHscrollInc, nHscrollMax - nHscrollPos)))!=0) {
		LONG lComplexity;
		HPOINTER hptr;
		hwndScroll = WinWindowFromID(WinQueryWindow(hwnd, QW_PARENT), FID_HORZSCROLL);
		nHscrollPos += nHscrollInc;
		scroll_pos.x = nHscrollPos;
/* KLUDGE BEGIN */
		/* remove pointer to cope with buggy display drivers */
		hptr = WinQueryPointer(HWND_DESKTOP);
		WinSetPointer(HWND_DESKTOP, 0);
/* KLUDGE END */
		lComplexity = WinScrollWindow(hwnd, -nHscrollInc, 0, (PRECTL)NULL, (PRECTL)NULL, 
			(HRGN)NULLHANDLE, (PRECTL)&rect, 0);
/* KLUDGE BEGIN */
		/* restore pointer after we removed it */
		WinSetPointer(HWND_DESKTOP, hptr);
/* KLUDGE END */
		/* need to send next message BEFORE redrawing, otherwise S3 driver screws up */
		WinSendMsg(hwndScroll, SBM_SETPOS, MPFROMLONG(nHscrollPos), 0);
		if (lComplexity != RGN_RECT) {
		    WinInvalidateRect(hwnd, (PRECTL)NULL, FALSE);
		    WinUpdateWindow(hwnd);
		}
		else {
		    /* redraw exposed area */
		    hps = WinGetPS(hwnd);
	            if ((bitmap.depth == 8) && display.hasPalMan && display.hpal_exists) {
	                GpiSelectPalette(hps, display.hpal);
                        WinRealizePalette(hwnd, hps, &ulclr);
		        paint_bitmap(hps, &rect, nHscrollPos, nVscrollMax - nVscrollPos);
	                GpiSelectPalette(hps, (HPAL)NULL);
	            }
		    else
		        paint_bitmap(hps, &rect, nHscrollPos, nVscrollMax - nVscrollPos);
		    WinValidateRect(hwnd, &rect, FALSE);
		    WinReleasePS(hps);
		}
	    }
	    break;
	case WM_CHAR:	/* process keystrokes here */
	    if (!(SHORT1FROMMP(mp1) & KC_KEYUP) && 
		(SHORT1FROMMP(mp1) & KC_VIRTUALKEY)) {
	        /* Process virtual keys only on presses, not key releases */
		USHORT vkey = SHORT2FROMMP(mp2);
		/* Note that the cursor keys these scroll hwnd_image, not hwnd.
		 * This is needed for fullscreen because the key presses
		 * are sent to the frame child window, not the fullscreen
		 * window which has the focus!
		 */ 
		switch(vkey) {
		    case VK_ESC:
			if (fullscreen)
			    gsview_fullscreen_end();
			break;
		    case VK_HOME:
	    		if (SHORT1FROMMP(mp1) & KC_CTRL)
			    WinSendMsg(hwnd_image, WM_HSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_TOP));
			else
			    WinSendMsg(hwnd_image, WM_VSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_TOP));
		    	break;
		    case VK_END:
	    		if (SHORT1FROMMP(mp1) & KC_CTRL)
			    WinSendMsg(hwnd_image, WM_HSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_BOTTOM));
			else
			    WinSendMsg(hwnd_image, WM_VSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_BOTTOM));
		    	break;
		    case VK_UP:
	    		if (SHORT1FROMMP(mp1) & KC_CTRL)
		    	    WinSendMsg(hwnd_image, WM_VSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_PAGEUP));
			else
			    WinSendMsg(hwnd_image, WM_VSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_LINEUP));
		    	break;
		    case VK_DOWN:
	    		if (SHORT1FROMMP(mp1) & KC_CTRL)
		    	    WinSendMsg(hwnd_image, WM_VSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_PAGEDOWN));
			else
			    WinSendMsg(hwnd_image, WM_VSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_LINEDOWN));
		    	break;
		    case VK_PAGEUP:
	    		if (SHORT1FROMMP(mp1) & KC_CTRL)
		    	    WinSendMsg(hwnd_image, WM_HSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_PAGELEFT));
		 	else
		    	    WinSendMsg(hwnd_image, WM_VSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_PAGEUP));
		    	break;
		    case VK_PAGEDOWN:
	    		if (SHORT1FROMMP(mp1) & KC_CTRL)
		    	    WinSendMsg(hwnd_image, WM_HSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_PAGERIGHT));
		 	else
		    	    WinSendMsg(hwnd_image, WM_VSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_PAGEDOWN));
		    	break;
		    case VK_LEFT:
	    		if (SHORT1FROMMP(mp1) & KC_CTRL)
		    	    WinSendMsg(hwnd_image, WM_HSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_PAGELEFT));
		  	else
		    	    WinSendMsg(hwnd_image, WM_HSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_LINELEFT));
		    	break;
		    case VK_RIGHT:
	    		if (SHORT1FROMMP(mp1) & KC_CTRL)
		    	    WinSendMsg(hwnd_image, WM_HSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_PAGERIGHT));
		    	else
		    	    WinSendMsg(hwnd_image, WM_HSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_LINERIGHT));
		    	break;
		}
	    }
	    break;
	case WM_BUTTON1DOWN:
		if (hwnd_modeless) 
		    WinPostMsg(hwnd_modeless, WM_COMMAND, MPFROMSHORT(BB_CLICK), MPFROMLONG(0));
		else {
		    int iword ;
		    float x, y;
		    PDFLINK link;
		    BOOL full = fullscreen && (hwnd == hwnd_fullscreen);
		    if (get_cursorpos(&x, &y)) {
			if (!full) {
			    HPS hps = WinGetPS(hwnd);
			    if ( (iword = word_find((int)x, (int)y)) >= 0 ) {
				/* remove any current selection */
				highlight_words(hps, text_mark_first, text_mark_last);
				/* mark new selection */
				text_mark_first = text_mark_last = iword;
				text_marking = TRUE;
				highlight_words(hps, text_mark_first, text_mark_last);
				WinSetCapture(HWND_DESKTOP, hwnd);
			    }
			    else {
				/* remove selection */
				highlight_words(hps, text_mark_first, text_mark_last);
				text_mark_first = text_mark_last = -1;
				WinSetCapture(HWND_DESKTOP, NULLHANDLE);
			    }
			    WinReleasePS(hps);
			}
		    }
		    /* pdfmark link */
		    if (is_link(x, y, &link)) {
			/* found link */
			if (link.page == 0) {
			    if (strcmp(link.action, "GoBack")==0)
				history_back();
			    else
				gserror(IDS_NOLINKTARGET, NULL, 0, SOUND_ERROR);
			}
			else {
			    gsview_unzoom();
			    pending.pagenum = link.page;
			    history_add(pending.pagenum);
			    pending.now = TRUE;
			}
		    }
		    else if (full) {
			WinPostMsg(hwnd_image, WM_COMMAND, 
			    MPFROMSHORT(IDM_NEXT), MPFROMLONG(0));
		    }
		    measure_setpoint(x, y);
		}
		break;
	case WM_BUTTON2DOWN:
		if (fullscreen && (hwnd == hwnd_fullscreen)) {
		    WinPostMsg(hwnd_image, WM_COMMAND, MPFROMSHORT(IDM_PREV), 
			MPFROMLONG(0));
		}
		else { 
		    float x, y;
		    int zwidth, zheight;
		    if (hwnd_modeless) {
			play_sound(SOUND_BUSY);
			break;
		    }
		    request_mutex();
		    if (get_cursorpos(&x, &y)) {
		        zoom = !zoom;
		        display.zoom_xoffset = (int)x;
		        display.zoom_yoffset = (int)y;
			if (cxClient > image.width)
			    zwidth = image.width;
			else
			    zwidth = cxClient;
			if (cyClient > image.height)
			    zheight = image.height;
			else
			    zheight = cyClient;
			x = (scroll_pos.x+zwidth/2)*72.0/option.xdpi;
			y = (scroll_pos.y+zheight/2)*72.0/option.ydpi;
			transform_point(&x, &y);
			x *= option.xdpi/72.0;
			y *= option.ydpi/72.0;
			display.zoom_xoffset -= (int)(x*72.0/option.zoom_xdpi);
			display.zoom_yoffset -= (int)(y*72.0/option.zoom_ydpi);
		    }
		    else {
		        zoom = FALSE;
		    }
		    release_mutex();
		    WinPostMsg(hwnd_bmp, WM_COMMAND, (MPARAM)IDM_ZOOM, MPFROMLONG(0));
		}
		break;
	case WM_MOUSEMOVE:
		/* track cursor and display coordinates */
		request_mutex();
		hps = WinGetPS(hwnd_status);
		WinFillRect(hps, &info_coord, SYSCLR_BUTTONMIDDLE);
		cursorpos_paint(hps);
		WinReleasePS(hps);
		release_mutex();
		/* extend marked text */
		if (text_marking) {
		    int iword ;
		    float x, y;
		    RECTL rect;
		    POINTL pt;
		    do { 
			if (!WinQueryPointerPos(HWND_DESKTOP, &pt))
			    return FALSE;

			WinMapWindowPoints(HWND_DESKTOP, hwnd_bmp, &pt, 1);
			WinQueryWindowRect(hwnd_bmp, &rect);
			if (pt.x > rect.xRight)
		    	    WinSendMsg(hwnd, WM_HSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_LINERIGHT));
			if (pt.x < rect.xLeft)
		    	    WinSendMsg(hwnd, WM_HSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_LINELEFT));
			if (pt.y < rect.yBottom)
		    	    WinSendMsg(hwnd, WM_VSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_LINEDOWN));
			if (pt.y > rect.yTop)
		    	    WinSendMsg(hwnd, WM_VSCROLL, MPFROMLONG(0), MPFROM2SHORT(0, SB_LINEUP));
			DosSleep(100);
		    } while ( (pt.x > rect.xRight) || (pt.x < rect.xLeft)
			   || (pt.y > rect.yTop)   || (pt.y < rect.yBottom) );
		    if (get_cursorpos(&x, &y)) {
			if ( (iword = word_find((int)x, (int)y)) >= 0 ) {
			    if (iword != text_mark_last) {
				HPS hps = WinGetPS(hwnd);
				int first, last;
				if ((text_mark_last-text_mark_first >= 0) != (iword-text_mark_first >= 0)) {
				    /* changing direction */
				    /* clear everything */
				    highlight_words(hps, text_mark_first, text_mark_last);
				    /* reinstate first word */
				    text_mark_last = text_mark_first;
				    highlight_words(hps, text_mark_first, text_mark_last);
				}
				if (iword != text_mark_last) {
				  if (iword >= text_mark_first) {
				    if (iword > text_mark_last)
					first=text_mark_last+1, last=iword;
				    else
					first=iword+1, last=text_mark_last;
				  }
				  else {
				    if (iword > text_mark_last)
					first=text_mark_last, last=iword-1;
				    else