/* * Copyright (c) 1994 Paul Vojta. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * NOTE: * xdvi is based on prior work, as noted in the modification history * in xdvi.c. */ #include /* Xlib and Xutil are already included */ #ifdef TOOLKIT #ifdef OLD_X11_TOOLKIT #include #else /* not OLD_X11_TOOLKIT */ #include #include #endif /* not OLD_X11_TOOLKIT */ #include /* needed for def. of XtNiconX */ #ifndef XtSpecificationRelease #define XtSpecificationRelease 0 #endif #if XtSpecificationRelease >= 4 #include #ifdef HTEX #include #include #endif #ifdef BUTTONS #include #endif #else /* XtSpecificationRelease < 4 */ #define XtPointer caddr_t #include #ifdef BUTTONS #include #endif #endif /* XtSpecificationRelease */ #else /* !TOOLKIT */ typedef int Position; #define XtPending() XPending(DISP) #endif /* TOOLKIT */ #if HAS_SIGIO #include #ifndef FASYNC #undef HAS_SIGIO #define HAS_SIGIO 0 #endif #endif #ifndef X11HEIGHT #define X11HEIGHT 8 /* Height of server default font */ #endif #define MAGBORD 1 /* border size for magnifier */ /* * Command line flags. */ #define delay_rulers resource._delay_rulers #define tick_units resource._tick_units #define tick_length resource._tick_length #define fore_Pixel resource._fore_Pixel #define back_Pixel resource._back_Pixel #ifdef TOOLKIT extern struct _resource resource; #define brdr_Pixel resource._brdr_Pixel #endif /* TOOLKIT */ #define clip_w mane.width #define clip_h mane.height static Position main_x, main_y; static Position mag_x, mag_y, new_mag_x, new_mag_y; static Boolean mag_moved = False; #ifdef TOOLKIT #ifdef BUTTONS static Widget line_widget, panel_widget; static int destroy_count = 0; /* added based on xdvi 20.55 */ #endif static Widget x_bar, y_bar; /* horizontal and vertical scroll bars */ static Arg resize_args[] = { {XtNwidth, (XtArgVal) 0}, {XtNheight, (XtArgVal) 0}, }; #define XdviResizeWidget(widget, w, h) \ (resize_args[0].value = (XtArgVal) (w), \ resize_args[1].value = (XtArgVal) (h), \ XtSetValues(widget, resize_args, XtNumber(resize_args)) ) #ifdef BUTTONS static Arg resizable_on[] = { {XtNresizable, (XtArgVal) True}, }; static Arg resizable_off[] = { {XtNresizable, (XtArgVal) False}, }; static Arg line_args[] = { {XtNbackground, (XtArgVal) 0}, {XtNwidth, (XtArgVal) 1}, {XtNheight, (XtArgVal) 0}, {XtNfromHoriz, (XtArgVal) NULL}, {XtNborderWidth, (XtArgVal) 0}, {XtNtop, (XtArgVal) XtChainTop}, {XtNbottom, (XtArgVal) XtChainBottom}, {XtNleft, (XtArgVal) XtChainRight}, {XtNright, (XtArgVal) XtChainRight}, }; static Arg panel_args[] = { {XtNfromHoriz, (XtArgVal) NULL}, {XtNwidth, (XtArgVal) (XTRA_WID - 1)}, {XtNheight, (XtArgVal) 0}, {XtNborderWidth, (XtArgVal) 0}, {XtNtop, (XtArgVal) XtChainTop}, {XtNbottom, (XtArgVal) XtChainBottom}, {XtNleft, (XtArgVal) XtChainRight}, {XtNright, (XtArgVal) XtChainRight}, }; static struct { _Xconst char *label; _Xconst char *name; int closure; int y_pos; } #define BPOS(n) (10 + (n)*28) command_table[] = { {"Quit", "quit", 'q', BPOS(1)}, {"Abort", "abort", 'Q', BPOS(2)}, {"Again", "again", '\001', BPOS(4)}, {"Help", "help", '?', BPOS(4)}, {"Reread", "reread", 'R', BPOS(5)}, #define LOWRES_s_COMMANDS 5 {"100%", "sh1", 1 << 8 | 's', BPOS(7)}, {"50%", "sh2", 2 << 8 | 's', BPOS(8)}, {"33%", "sh3", 3 << 8 | 's', BPOS(9)}, {"25%", "sh4", 4 << 8 | 's', BPOS(10)}, #define HIRES_s_COMMANDS 9 {"50%", "sh2", 2 << 8 | 's', BPOS(7)}, {"25%", "sh4", 4 << 8 | 's', BPOS(8)}, {"17%", "sh6", 6 << 8 | 's', BPOS(9)}, {"13%", "sh8", 8 << 8 | 's', BPOS(10)}, #define NUMBER_s_COMMANDS (HIRES_s_COMMANDS - LOWRES_s_COMMANDS) {"First", "next0", 1 << 8 | 'g', BPOS(12)}, {"Page-10", "prev10", 10 << 8 | 'p', BPOS(13)}, {"Page-5", "prev5", 5 << 8 | 'p', BPOS(14)}, {"Prev", "prev", 'p', BPOS(15)}, {"Next", "next", 'n', BPOS(16)}, {"Page+5", "next5", 5 << 8 | 'n', BPOS(17)}, {"Page+10", "next10", 10 << 8 | 'n', BPOS(18)}, {"Last", "next999", 'g', BPOS(19)}, #if PS {"View PS", "postscript", 'v', BPOS(21)}, #endif #ifdef HTEX {"Back", "back", 'B', BPOS(23)}, #endif #ifdef SELFILE {"File", "file", '\006', BPOS(24)}, #endif /* SELFILE */ }; static void handle_command(); static XtCallbackRec command_call[] = { {handle_command, NULL}, {NULL, NULL}, }; static Arg command_args[] = { {XtNlabel, (XtArgVal) NULL}, {XtNx, (XtArgVal) 6}, {XtNy, (XtArgVal) 0}, {XtNwidth, (XtArgVal) 64}, {XtNheight, (XtArgVal) 30}, {XtNcallback, (XtArgVal) command_call}, }; /* We split this help string into smaller pieces, because some C implementations have been known to croak on large strings. */ static char* help_string[] = { "", "----------------------------Help and Exiting----------------------------", "", "h or H or ? or Help", " Displays this help text.", "", "q or Control-C or Control-D or Cancel or Stop or Control-Z (VAX VMS)", " Quits the program.", "", "------------------------------Page Motion-------------------------------", "", "n or f or Space or Return or LineFeed or PgDn", " Moves to the next page (or to the nth next page if a", " number is given).", "", "p or b or Control-H or BackSpace or DELete or PgUp", " Moves to the previous page (or back n pages).", "", "u or Up-arrow", " Moves up two thirds of a window-full.", "", "d or Down-arrow", " Moves down two thirds of a window-full.", "", "l or Left-arrow", " Moves left two thirds of a window-full.", "", "r or Right-arrow", " Moves right two thirds of a window-full.", "", "g or j or End", " Moves to the page with the given number. Initially,", " the first page is assumed to be page number 1, but this", " can be changed with the `P' keystroke, below. If no", " page number is given, then it goes to the last page.", "", "< Move to first page in document.", "> Move to last page in document.", "", "-----------------------------Other Commands-----------------------------", "", "Control-A or Again", " Repeat last command (including its argument).", "", "Control-L or Clear", " Redisplays the current page.", "", "Control-P", " Prints bitmap unit, bit order, and byte order.", "", "^ or Home", " Move to the ``home'' position of the page. This is", " normally the upper left-hand corner of the page,", " depending on the margins as described in the -margins", " option, above.", "", "c Moves the page so that the point currently beneath the", " cursor is moved to the middle of the window. It also", " (gasp!) warps the cursor to the same place.", "", "G This key toggles the use of greyscale anti-aliasing for", " displaying shrunken bitmaps. In addition, the key", " sequences `0G' and `1G' clear and set this flag,", " respectively. See also the -nogrey option.", "", "k Normally when xdvi switches pages, it moves to the home", " position as well. The `k' keystroke toggles a `keep-", " position' flag which, when set, will keep the same", " position when moving between pages. Also `0k' and `1k'", " clear and set this flag, respectively. See also the", " -keep option.", "", "M Sets the margins so that the point currently under the", " cursor is the upper left-hand corner of the text in the", " page. Note that this command itself does not move the", " image at all. For details on how the margins are used,", " see the -margins option.", "", "P ``This is page number n.'' This can be used to make", " the `g' keystroke refer to actual page numbers instead", " of absolute page numbers.", "", "R Forces the dvi file to be reread. This allows you to", " preview many versions of the same file while running", " xdvi only once.", "", "s Changes the shrink factor to the given number. If no", " number is given, the smallest factor that makes the", " entire page fit in the window will be used. (Margins", " are ignored in this computation.)", "", "S Sets the density factor to be used when shrinking", " bitmaps. This should be a number between 0 and 100;", " higher numbers produce lighter characters.", "", "t Toggles to the next unit in a sorted list of TeX dimension", " units for the popup magnifier ruler.", "", "x Toggles expert mode (in which the buttons do not appear).", " Also `0x' and `1x' clear and enable this mode,", " respectively. See also the -expert option.", "", #ifdef SELFILE "Control-F Find another DVI file.", "", #endif #ifdef HTEX "B Go back to the previous anchor.", "F Follow hyperlink forward.", "", #endif "------------------------------------------------------------------------", }; static void show_help() { int k; for (k = 0; k < (sizeof(help_string)/sizeof(help_string[0])); ++k) (void)puts(help_string[k]); } void create_buttons(h) XtArgVal h; { int i; line_args[0].value = (XtArgVal) resource._hl_Pixel; line_args[2].value = h; line_args[3].value = (XtArgVal) vport_widget; line_widget = XtCreateManagedWidget("line", widgetClass, form_widget, line_args, XtNumber(line_args)); panel_args[0].value = (XtArgVal) line_widget; panel_args[2].value = h; panel_widget = XtCreateManagedWidget("panel", compositeWidgetClass, form_widget, panel_args, XtNumber(panel_args)); command_args[2].value = (XtArgVal) vport_widget; for (i = 0; i < XtNumber(command_table); ++i) { if ( ((i==HIRES_s_COMMANDS)&&(pixels_per_inch<600)) || ((i==LOWRES_s_COMMANDS)&&(pixels_per_inch>=600)) ) i+=NUMBER_s_COMMANDS; command_args[0].value = (XtArgVal) command_table[i].label; command_args[2].value = (XtArgVal) command_table[i].y_pos; command_call[0].closure = (XtPointer) &command_table[i].closure; (void) XtCreateManagedWidget(command_table[i].name, commandWidgetClass, panel_widget, command_args, XtNumber(command_args)); } } #endif /* BUTTONS */ #else /* !TOOLKIT */ static Window x_bar, y_bar; static int x_bgn, x_end, y_bgn, y_end; /* scrollbar positions */ #endif /* TOOLKIT */ /* * Mechanism to keep track of the magnifier window. The problems are, * (a) if the button is released while the window is being drawn, this * could cause an X error if we continue drawing in it after it is * destroyed, and * (b) creating and destroying the window too quickly confuses the window * manager, which is avoided by waiting for an expose event before * destroying it. */ static short alt_stat; /* 1 = wait for expose, */ /* -1 = destroy upon expose */ static Boolean alt_canit; /* stop drawing this window */ /* * Data for buffered events. */ static VOLATILE short event_freq = 70; static void can_exposures(), keystroke(); #ifdef GREY #define gamma resource._gamma void init_pix(warn) Boolean warn; { static int shrink_allocated_for = 0; static float oldgamma = 0.0; int i; if (gamma != oldgamma) { static Pixel plane_masks[4]; static Pixel pixel; XColor color, fc, bc; XGCValues values; if (!copy) /* allocate 4 color planes for 16 colors (for GXor drawing) */ if (oldgamma == 0.0 && !XAllocColorCells(DISP, DefaultColormapOfScreen(SCRN), False, plane_masks, 4, &pixel, 1)) copy = warn = True; /* get foreground and background RGB values for interpolating */ fc.pixel = fore_Pixel; XQueryColor(DISP, DefaultColormapOfScreen(SCRN), &fc); bc.pixel = back_Pixel; XQueryColor(DISP, DefaultColormapOfScreen(SCRN), &bc); for (i = 0; i < 16; ++i) { double frac = gamma > 0 ? pow((double) i / 15, 1 / gamma) : 1 - pow((double) (15 - i) / 15, -gamma); color.red = frac * ((double) fc.red - bc.red) + bc.red; color.green = frac * ((double) fc.green - bc.green) + bc.green; color.blue = frac * ((double) fc.blue - bc.blue) + bc.blue; color.pixel = pixel; color.flags = DoRed | DoGreen | DoBlue; if (!copy) { if (i & 1) color.pixel |= plane_masks[0]; if (i & 2) color.pixel |= plane_masks[1]; if (i & 4) color.pixel |= plane_masks[2]; if (i & 8) color.pixel |= plane_masks[3]; XStoreColor(DISP, DefaultColormapOfScreen(SCRN), &color); palette[i] = color.pixel; } else { if (!XAllocColor(DISP, DefaultColormapOfScreen(SCRN), &color)) palette[i] = (i * 100 >= density * 15) ? fore_Pixel : back_Pixel; else palette[i] = color.pixel; } } /* Make sure fore_ and back_Pixel are a part of the palette */ fore_Pixel = palette[15]; back_Pixel = palette[0]; if (mane.win != (Window) 0) XSetWindowBackground(DISP, mane.win, palette[0]); #define MakeGC(fcn, fg, bg) (values.function = fcn, values.foreground=fg,\ values.background=bg,\ XCreateGC(DISP, RootWindowOfScreen(SCRN),\ GCFunction|GCForeground|GCBackground, &values)) foreGC = ruleGC = MakeGC(copy ? GXcopy : GXor, fore_Pixel, back_Pixel); foreGC2 = NULL; oldgamma = gamma; if (resource.copy == Maybe && copy && warn) Puts("Note: overstrike characters may be incorrect."); } #undef MakeGC if (mane.shrinkfactor == 1) return; if (shrink_allocated_for < mane.shrinkfactor) { if (pixeltbl != NULL) free((char *) pixeltbl); pixeltbl = (Pixel *) xmalloc((unsigned) (mane.shrinkfactor * mane.shrinkfactor + 1) * sizeof(Pixel), "pixel table"); shrink_allocated_for = mane.shrinkfactor; } for (i = 0; i <= mane.shrinkfactor * mane.shrinkfactor; ++i) pixeltbl[i] = palette[(i * 30 + mane.shrinkfactor * mane.shrinkfactor) / (2 * mane.shrinkfactor * mane.shrinkfactor)]; } #endif /* GREY */ /* * Ruler routines */ static int tick_scale(k) int k; { if (k == 0) return 3; else if ((k % 1000) == 0) return 7; else if ((k % 500) == 0) return 6; else if ((k % 100) == 0) return 5; else if ((k % 50) == 0) return 4; else if ((k % 10) == 0) return 3; else if ((k % 5) == 0) return 2; else return 1; } static void draw_rulers(width, height, ourGC) unsigned int width, height; GC ourGC; { int k; /* tick counter */ double old_pixels_per_tick; double pixels_per_tick; int scale; int tick_offset; /* offset along axes */ int x; /* coordinates of top-left popup */ int y; /* window corner */ double xx; /* coordinates of tick */ double yy; /* coordinates of tick */ static char *last_tick_units = ""; /* memory of last tick units */ if (tick_length <= 0) /* user doesn't want tick marks */ return; x = 0; /* the pop-up window always has origin (0,0) */ y = 0; /* We need to clear the existing window to remove old rulers. I think that this could be avoided if draw_rulers() could be invoked earlier. The expose argument in XClearArea() must be True to force redrawing of the text inside the popup window. Also, it would be better to draw the rulers before painting the text, so that rulers would not overwrite the text, but I haven't figured out yet how to arrange that. */ XClearArea(DISP, alt.win, x, y, width, height, True); /* The global resource._pixels_per_inch tells us how to find the ruler scale. For example, 300dpi corresponds to these TeX units: 1 TeX point (pt) = 4.151 pixels 1 big point (bp) = 4.167 pixels 1 pica (pc) = 49.813 pixels 1 cicero (cc) = 53.501 pixels 1 didot point (dd) = 4.442 pixels 1 millimeter (mm) = 11.811 pixels 1 centimeter (cm) = 118.110 pixels 1 inch (in) = 300.000 pixels 1 scaled point (sp) = 0.00006334 pixels The user can select the units via a resource (e.g. XDvi*tickUnits: bp), or a command-line option (e.g. -xrm '*tickUnits: cm'). The length of the ticks can be controlled by a resource (e.g. XDvi*tickLength: 10), or a command-line option (e.g. -xrm '*tickLength: 10000'). If the tick length exceeds the popup window size, then a graph-paper grid is drawn over the whole window. Zero, or negative, tick length completely suppresses rulers. */ pixels_per_tick = (double)resource._pixels_per_inch; if (strcmp(tick_units,"pt") == 0) pixels_per_tick /= 72.27; else if (strcmp(tick_units,"bp") == 0) pixels_per_tick /= 72.0; else if (strcmp(tick_units,"in") == 0) /* NO-OP */; else if (strcmp(tick_units,"cm") == 0) pixels_per_tick /= 2.54; else if (strcmp(tick_units,"mm") == 0) pixels_per_tick /= 25.4; else if (strcmp(tick_units,"dd") == 0) pixels_per_tick *= (1238.0 / 1157.0) / 72.27; else if (strcmp(tick_units,"cc") == 0) pixels_per_tick *= 12.0 * (1238.0 / 1157.0) / 72.27; else if (strcmp(tick_units,"pc") == 0) pixels_per_tick *= 12.0 /72.27; else if (strcmp(tick_units,"sp") == 0) pixels_per_tick /= (65536.0 * 72.27); else { Printf("Unrecognized tickUnits [%s]: defaulting to TeX points [pt]\n", tick_units); tick_units = "pt"; pixels_per_tick /= 72.27; } /* To permit accurate measurement in the popup window, we can reasonably place tick marks about 3 to 10 pixels apart, so we scale the computed pixels_per_tick by a power of ten to bring it into that range. */ old_pixels_per_tick = pixels_per_tick; /* remember the original scale */ while (pixels_per_tick < 3.0) pixels_per_tick *= 10.0; while (pixels_per_tick > 30.0) pixels_per_tick /= 10.0; if (strcmp(last_tick_units, tick_units) != 0) { /* tell user what the ruler scale is, but only when it changes */ if (old_pixels_per_tick != pixels_per_tick) Printf("Ruler tick interval adjusted to represent %.2f%s\n", pixels_per_tick/old_pixels_per_tick, tick_units); else if (debug & DBG_EVENT) Printf("Ruler tick interval represents 1%s\n", tick_units); } /* In order to make the ruler as accurate as possible, given the coarse screen resolution, we compute tick positions in floating-point arithmetic, then round to nearest integer values. */ for (k = 0, xx = 0.0; xx < (double)width; k++, xx += pixels_per_tick) { /* draw vertical ticks on top and bottom */ tick_offset = (int)(0.5 + xx); /* round to nearest pixel */ scale = tick_scale(k); XDrawLine(DISP, alt.win, ourGC, x + tick_offset, y, x + tick_offset, y + scale*tick_length); XDrawLine(DISP, alt.win, ourGC, x + tick_offset, y + height, x + tick_offset, y + height - scale*tick_length); } for (k = 0, yy = 0.0; yy < (double)height; k++, yy += pixels_per_tick) { /* draw horizontal ticks on left and right */ tick_offset = (int)(0.5 + yy); /* round to nearest pixel */ scale = tick_scale(k); XDrawLine(DISP, alt.win, ourGC, x, y + tick_offset, x + scale*tick_length, y + tick_offset); XDrawLine(DISP, alt.win, ourGC, x + width, y + tick_offset, x + width - scale*tick_length, y + tick_offset); } last_tick_units = tick_units; XFlush(DISP); /* bring window up-to-date */ } /* * Event-handling routines */ static void expose(windowrec, x, y, w, h) register struct WindowRec *windowrec; int x, y; unsigned int w, h; { if (windowrec->min_x > x) windowrec->min_x = x; if (windowrec->max_x < x + w) windowrec->max_x = x + w; if (windowrec->min_y > y) windowrec->min_y = y; if (windowrec->max_y < y + h) windowrec->max_y = y + h; } static void clearexpose(windowrec, x, y, w, h) struct WindowRec *windowrec; int x, y; unsigned int w, h; { XClearArea(DISP, windowrec->win, x, y, w, h, False); expose(windowrec, x, y, w, h); } static void scrollwindow(windowrec, x0, y0) register struct WindowRec *windowrec; int x0, y0; { int x, y; int x2 = 0, y2 = 0; int ww, hh; x = x0 - windowrec->base_x; y = y0 - windowrec->base_y; ww = windowrec->width - x; hh = windowrec->height - y; windowrec->base_x = x0; windowrec->base_y = y0; if (currwin.win == windowrec->win) { currwin.base_x = x0; currwin.base_y = y0; } windowrec->min_x -= x; if (windowrec->min_x < 0) windowrec->min_x = 0; windowrec->max_x -= x; if (windowrec->max_x > windowrec->width) windowrec->max_x = windowrec->width; windowrec->min_y -= y; if (windowrec->min_y < 0) windowrec->min_y = 0; windowrec->max_y -= y; if (windowrec->max_y > windowrec->height) windowrec->max_y = windowrec->height; if (x < 0) { x2 = -x; x = 0; ww = windowrec->width - x2; } if (y < 0) { y2 = -y; y = 0; hh = windowrec->height - y2; } if (ww <= 0 || hh <= 0) { XClearWindow(DISP, windowrec->win); windowrec->min_x = windowrec->min_y = 0; windowrec->max_x = windowrec->width; windowrec->max_y = windowrec->height; } else { XCopyArea(DISP, windowrec->win, windowrec->win, DefaultGCOfScreen(SCRN), x, y, (unsigned int) ww, (unsigned int) hh, x2, y2); if (x > 0) clearexpose(windowrec, ww, 0, (unsigned int) x, windowrec->height); if (x2 > 0) clearexpose(windowrec, 0, 0, (unsigned int) x2, windowrec->height); if (y > 0) clearexpose(windowrec, 0, hh, windowrec->width, (unsigned int) y); if (y2 > 0) clearexpose(windowrec, 0, 0, windowrec->width, (unsigned int) y2); } } #ifdef TOOLKIT /* * routines for X11 toolkit */ static Arg arg_wh[] = { {XtNwidth, (XtArgVal) &window_w}, {XtNheight, (XtArgVal) &window_h}, }; static Position window_x, window_y; static Arg arg_xy[] = { {XtNx, (XtArgVal) &window_x}, {XtNy, (XtArgVal) &window_y}, }; #define get_xy() XtGetValues(draw_widget, arg_xy, XtNumber(arg_xy)) #define mane_base_x 0 #define mane_base_y 0 void /* not static because SELFILE stuff in dvi_init.c needs it */ home(scrl) Boolean scrl; { #if PS psp.interrupt(); #endif if (!scrl) XUnmapWindow(DISP, mane.win); get_xy(); if (x_bar != NULL) { register int coord = (page_w - clip_w) / 2; if (coord > home_x / mane.shrinkfactor) coord = home_x / mane.shrinkfactor; XtCallCallbacks(x_bar, XtNscrollProc, (XtPointer) (window_x + coord)); } if (y_bar != NULL) { register int coord = (page_h - clip_h) / 2; if (coord > home_y / mane.shrinkfactor) coord = home_y / mane.shrinkfactor; XtCallCallbacks(y_bar, XtNscrollProc, (XtPointer) (window_y + coord)); } if (!scrl) { XMapWindow(DISP, mane.win); /* Wait for the server to catch up---this eliminates flicker. */ XSync(DISP, False); } } static Boolean resized = False; /* added based on xdvi 20.55 */ static void handle_destroy_bar(w, client_data, call_data) Widget w; XtPointer client_data; XtPointer call_data; { * (Widget *) client_data = NULL; } /* modified based on xdvi 20.55 */ static void get_geom() { static Dimension new_clip_w, new_clip_h; static Arg arg_wh_clip[] = { {XtNwidth, (XtArgVal) &new_clip_w}, {XtNheight, (XtArgVal) &new_clip_h}, }; register int old_clip_w; XtGetValues(vport_widget, arg_wh, XtNumber(arg_wh)); XtGetValues(clip_widget, arg_wh_clip, XtNumber(arg_wh_clip)); /* Note: widgets may be destroyed but not forgotten */ if (x_bar == NULL) { x_bar = XtNameToWidget(vport_widget, "horizontal"); if (x_bar != NULL) XtAddCallback(x_bar, XtNdestroyCallback, handle_destroy_bar, (XtPointer) &x_bar); } if (y_bar == NULL) { y_bar = XtNameToWidget(vport_widget, "vertical"); if (y_bar != NULL) XtAddCallback(y_bar, XtNdestroyCallback, handle_destroy_bar, (XtPointer) &y_bar); } old_clip_w = clip_w; /* we need to do this because */ /* sizeof(Dimension) != sizeof(int) */ clip_w = new_clip_w; clip_h = new_clip_h; if (old_clip_w == 0) home(False); resized = False; } static void center(x, y) int x, y; { /* We use the clip widget here because it gives a more exact value. */ x -= clip_w/2; y -= clip_h/2; if (x_bar) XtCallCallbacks(x_bar, XtNscrollProc, (XtPointer) x); if (y_bar) XtCallCallbacks(y_bar, XtNscrollProc, (XtPointer) y); XWarpPointer(DISP, None, None, 0, 0, 0, 0, -x, -y); } /* * callback routines */ /*ARGSUSED*/ void handle_resize(widget, junk, event, cont) Widget widget; XtPointer junk; XEvent *event; Boolean *cont; /* unused */ { resized = True; } #ifdef BUTTONS /*ARGSUSED*/ static void handle_command(widget, client_data_p, call_data) Widget widget; XtPointer client_data_p; XtPointer call_data; { int client_data = * (int *) client_data_p; keystroke((client_data) & 0xff, (client_data) >> 8, ((client_data) >> 8) != 0, (XEvent *) NULL); } static void /* added based on xdvi 20.55 */ handle_destroy_buttons(w, client_data, call_data) Widget w; XtPointer client_data; XtPointer call_data; { if (--destroy_count != 0) return; XtSetValues(vport_widget, resizable_on, XtNumber(resizable_on)); if (resource.expert) { XtGetValues(form_widget, arg_wh, XtNumber(arg_wh)); XdviResizeWidget(vport_widget, window_w, window_h); } else { XdviResizeWidget(vport_widget, window_w -= XTRA_WID, window_h); create_buttons((XtArgVal) window_h); } } #endif /* BUTTONS */ void reconfig() { #ifdef BUTTONS XtSetValues(vport_widget, resizable_off, XtNumber(resizable_off)); #endif XdviResizeWidget(draw_widget, page_w, page_h); get_geom(); } #ifdef HTEX #define BIGBUF 32768 char anchorpaintstring[BIGBUF]; static Arg new_paint_args[] = { {XtNstring, (XtArgVal) anchorpaintstring}, }; /* Using Text widget ??? - see if this works... */ void paint_anchor(text) char *text; { static long pos = 0; /* Keep track of how many characters we've added */ int len; char *firstnl; if (text == NULL) { /* Not on anchor any more */ if ((pos > 0) && (pos < BIGBUF) && (anchorpaintstring[pos-1] != '\n')) { anchorpaintstring[pos]= '\n'; /* But we were */ anchorpaintstring[pos+1]= '\0'; pos += 1; XtSetValues(anchor_info, new_paint_args, XtNumber(new_paint_args)); XawTextSetInsertionPoint(anchor_info, pos); } return; } /* There IS some anchor text under the mouse */ len = strlen(text); if (!strcmp(text, anchorpaintstring+pos-len)) { /* Still on same anchor */ return; } if (len > BIGBUF) { /* Try it anyway: */ text[BIGBUF-1] = '\0'; len = BIGBUF; } if ((pos + len) > BIGBUF) { /* Fix in case of overflows... */ firstnl = index(anchorpaintstring+pos+len-BIGBUF, '\n'); if (firstnl == NULL) { pos = 0; } else { strcpy(anchorpaintstring,firstnl+1); pos -= 1 + firstnl - anchorpaintstring; } } if (pos < 0) pos = 0; /* Shouldn't happen but... */ sprintf(anchorpaintstring+pos,"\n%s", text); pos += len+1; XtSetValues(anchor_info, new_paint_args, XtNumber(new_paint_args)); XawTextSetInsertionPoint(anchor_info, pos); XawTextDisplay(anchor_info); } extern char anchorsearchstring[]; /* not being used? */ /* Callback for anchor search: */ void search_callback(w, c_p, call_data) Widget w; XtPointer c_p, call_data; { int len; char *cp; cp = XawDialogGetValueString(anchor_search); if (cp == NULL) return; len = strlen(cp); strcpy(anchorsearchstring,cp); if (index(cp,'\n') == NULL) { anchorsearchstring[len] = '\n'; anchorsearchstring[len+1] = '\0'; } len = index(anchorsearchstring,'\n') - anchorsearchstring + 1; add_search(anchorsearchstring, len); } #endif #else /* !TOOLKIT */ #ifdef HTEX /* The anchor window stuff: */ void paint_anchor(text) char *text; { ClearArea(anchor_info, 1, 1, clip_w/2, BAR_THICK); if (text != NULL) XDrawString(DISP, anchor_info, foreGC, 1 , BAR_WID, text, strlen(text)); } #endif /* * brute force scrollbar routines */ static void paint_x_bar() { register int new_x_bgn = mane.base_x * clip_w / page_w; register int new_x_end = (mane.base_x + clip_w) * clip_w / page_w; if (new_x_bgn >= x_end || x_bgn >= new_x_end) { /* no overlap */ XClearArea(DISP, x_bar, x_bgn, 1, x_end - x_bgn, BAR_WID, False); XFillRectangle(DISP, x_bar, ruleGC, new_x_bgn, 1, new_x_end - new_x_bgn, BAR_WID); } else { /* this stuff avoids flicker */ if (x_bgn < new_x_bgn) XClearArea(DISP, x_bar, x_bgn, 1, new_x_bgn - x_bgn, BAR_WID, False); else XFillRectangle(DISP, x_bar, ruleGC, new_x_bgn, 1, x_bgn - new_x_bgn, BAR_WID); if (new_x_end < x_end) XClearArea(DISP, x_bar, new_x_end, 1, x_end - new_x_end, BAR_WID, False); else XFillRectangle(DISP, x_bar, ruleGC, x_end, 1, new_x_end - x_end, BAR_WID); } x_bgn = new_x_bgn; x_end = new_x_end; } static void paint_y_bar() { register int new_y_bgn = mane.base_y * clip_h / page_h; register int new_y_end = (mane.base_y + clip_h) * clip_h / page_h; if (new_y_bgn >= y_end || y_bgn >= new_y_end) { /* no overlap */ XClearArea(DISP, y_bar, 1, y_bgn, BAR_WID, y_end - y_bgn, False); XFillRectangle(DISP, y_bar, ruleGC, 1, new_y_bgn, BAR_WID, new_y_end - new_y_bgn); } else { /* this stuff avoids flicker */ if (y_bgn < new_y_bgn) XClearArea(DISP, y_bar, 1, y_bgn, BAR_WID, new_y_bgn - y_bgn, False); else XFillRectangle(DISP, y_bar, ruleGC, 1, new_y_bgn, BAR_WID, y_bgn - new_y_bgn); if (new_y_end < y_end) XClearArea(DISP, y_bar, 1, new_y_end, BAR_WID, y_end - new_y_end, False); else XFillRectangle(DISP, y_bar, ruleGC, 1, y_end, BAR_WID, new_y_end - y_end); } y_bgn = new_y_bgn; y_end = new_y_end; } static void scrollmane(x, y) int x, y; { register int old_base_x = mane.base_x; register int old_base_y = mane.base_y; #if PS psp.interrupt(); #endif if (x > (int) (page_w - clip_w)) x = page_w - clip_w; if (x < 0) x = 0; if (y > (int) (page_h - clip_h)) y = page_h - clip_h; if (y < 0) y = 0; scrollwindow(&mane, x, y); if (old_base_x != mane.base_x && x_bar) paint_x_bar(); if (old_base_y != mane.base_y && y_bar) paint_y_bar(); } void reconfig() { int x_thick = 0; int y_thick = 0; /* determine existence of scrollbars */ if (window_w < page_w) x_thick = BAR_THICK; if (window_h - x_thick < page_h) y_thick = BAR_THICK; clip_w = window_w - y_thick; if (clip_w < page_w) x_thick = BAR_THICK; clip_h = window_h - x_thick; /* process drawing (clip) window */ if (mane.win == (Window) 0) { /* initial creation */ XWindowAttributes attrs; mane.win = XCreateSimpleWindow(DISP, top_level, y_thick, x_thick, (unsigned int) clip_w, (unsigned int) clip_h, 0, brdr_Pixel, back_Pixel); XSelectInput(DISP, mane.win, ExposureMask | #ifdef HTEX PointerMotionMask | PointerMotionHintMask | ButtonPressMask | ButtonReleaseMask); #else ButtonPressMask | ButtonMotionMask | ButtonReleaseMask); #endif (void) XGetWindowAttributes(DISP, mane.win, &attrs); backing_store = attrs.backing_store; XMapWindow(DISP, mane.win); } else XMoveResizeWindow(DISP, mane.win, y_thick, x_thick, clip_w, clip_h); #ifdef HTEX if (anchor_info) { XMoveResizeWindow(DPY anchor_info, y_thick - 1, x_thick - BAR_THICK - 1, clip_w/2, BAR_THICK - 1); paint_anchor(NULL); XMoveResizeWindow(DPY anchor_search, y_thick + clip_w/2 - 1, x_thick - BAR_THICK - 1, clip_w/2, BAR_THICK - 1); } else { anchor_info = XCreateSimpleWindow(DISP, top_level, y_thick - 1, x_thick - BAR_THICK -1, (unsigned int) clip_w/2, BAR_THICK - 1, 1, brdr_Pixel, back_Pixel); XSelectInput(DISP, anchor_info, ExposureMask); anchor_search = XCreateSimpleWindow(DISP, top_level, y_thick + clip_w/2 - 1, x_thick - BAR_THICK -1, (unsigned int) clip_w/2, BAR_THICK - 1, 1, brdr_Pixel, back_Pixel); XSelectInput(DISP, anchor_search, ExposureMask|KeyPressMask); XMapWindow(DPY anchor_info); XMapWindow(DPY anchor_search); } #endif /* process scroll bars */ if (x_thick) { if (x_bar) { XMoveResizeWindow(DISP, x_bar, y_thick - 1, -1, clip_w, BAR_THICK - 1); paint_x_bar(); } else { x_bar = XCreateSimpleWindow(DISP, top_level, y_thick - 1, -1, (unsigned int) clip_w, BAR_THICK - 1, 1, brdr_Pixel, back_Pixel); XSelectInput(DISP, x_bar, ExposureMask | ButtonPressMask | Button2MotionMask); XMapWindow(DISP, x_bar); } x_bgn = mane.base_x * clip_w / page_w; x_end = (mane.base_x + clip_w) * clip_w / page_w; } else if (x_bar) { XDestroyWindow(DISP, x_bar); x_bar = (Window) 0; } if (y_thick) { if (y_bar) { XMoveResizeWindow(DISP, y_bar, -1, x_thick - 1, BAR_THICK - 1, clip_h); paint_y_bar(); } else { y_bar = XCreateSimpleWindow(DISP, top_level, -1, x_thick - 1, BAR_THICK - 1, (unsigned int) clip_h, 1, brdr_Pixel, back_Pixel); XSelectInput(DISP, y_bar, ExposureMask | ButtonPressMask | Button2MotionMask); XMapWindow(DISP, y_bar); } y_bgn = mane.base_y * clip_h / page_h; y_end = (mane.base_y + clip_h) * clip_h / page_h; } else if (y_bar) { XDestroyWindow(DISP, y_bar); y_bar = (Window) 0; } } static void home(scrl) Boolean scrl; { int x = 0, y = 0; if (page_w > clip_w) { x = (page_w - clip_w) / 2; if (x > home_x / mane.shrinkfactor) x = home_x / mane.shrinkfactor; } if (page_h > clip_h) { y = (page_h - clip_h) / 2; if (y > home_y / mane.shrinkfactor) y = home_y / mane.shrinkfactor; } if (scrl) scrollmane(x, y); else { mane.base_x = x; mane.base_y = y; if (currwin.win == mane.win) { currwin.base_x = x; currwin.base_y = y; } if (x_bar) paint_x_bar(); if (y_bar) paint_y_bar(); } } #define get_xy() #define window_x 0 #define window_y 0 #define mane_base_x mane.base_x #define mane_base_y mane.base_y #endif /* TOOLKIT */ static void compute_mag_pos(xp, yp) int *xp, *yp; { register int t; t = mag_x + main_x - alt.width/2; if (t > WidthOfScreen(SCRN) - (int) alt.width - 2*MAGBORD) t = WidthOfScreen(SCRN) - (int) alt.width - 2*MAGBORD; if (t < 0) t = 0; *xp = t; t = mag_y + main_y - alt.height/2; if (t > HeightOfScreen(SCRN) - (int) alt.height - 2*MAGBORD) t = HeightOfScreen(SCRN) - (int) alt.height - 2*MAGBORD; if (t < 0) t = 0; *yp = t; } #define TRSIZE 100 #ifdef TOOLKIT /*ARGSUSED*/ void handle_key(widget, junk, eventp, cont) Widget widget; XtPointer junk; XEvent *eventp; Boolean *cont; /* unused */ #else /* !TOOLKIT */ void handle_key(eventp) XEvent *eventp; #endif /* TOOLKIT */ { static Boolean has_arg = False; static int number = 0; static int sign = 1; char ch; Boolean arg0; int number0; char trbuf[TRSIZE]; int nbytes; nbytes = XLookupString(&eventp->xkey, trbuf, TRSIZE, (KeySym *) NULL, (XComposeStatus *) NULL); if (nbytes == 0) return; ch = '\0'; if (nbytes == 1) ch = *trbuf; if (ch >= '0' && ch <= '9') { has_arg = True; number = number * 10 + sign * (ch - '0'); return; } else if (ch == '-') { has_arg = True; sign = -1; number = 0; return; } number0 = number; number = 0; sign = 1; arg0 = has_arg; has_arg = False; keystroke(ch, number0, arg0, eventp); } #ifdef TOOLKIT /*ARGSUSED*/ void handle_button(widget, junk, ev, cont) Widget widget; XtPointer junk; XEvent *ev; #define event (&(ev->xbutton)) Boolean *cont; /* unused */ #else /* !TOOLKIT */ void handle_button(event) XButtonEvent *event; #endif /* TOOLKIT */ { int x, y; struct mg_size_rec *size_ptr = mg_size + event->button - 1; XSetWindowAttributes attr; #ifdef HTEX if ((event->button == 1)||(event->button == 2)) { if (pointerlocate(&x, &y)) { /* Only do this if there's actually an href right there */ int ret; /* screen_to_page(&mane,x,y,&page,&px,&py); */ if (event->button == 2) HTeXnext_extern = 1; ret = htex_handleref(current_page, x, y); HTeXnext_extern = 0; if (ret == 1) return; } } #endif if (alt.win != (Window) 0 || mane.shrinkfactor == 1 || size_ptr->w <= 0) XBell(DISP, 20); else { mag_x = event->x; mag_y = event->y; alt.width = size_ptr->w; alt.height = size_ptr->h; main_x = event->x_root - mag_x; main_y = event->y_root - mag_y; compute_mag_pos(&x, &y); alt.base_x = (event->x + mane_base_x) * mane.shrinkfactor - alt.width/2; alt.base_y = (event->y + mane_base_y) * mane.shrinkfactor - alt.height/2; attr.save_under = True; attr.border_pixel = brdr_Pixel; attr.background_pixel = back_Pixel; attr.override_redirect = True; alt.win = XCreateWindow(DISP, RootWindowOfScreen(SCRN), x, y, alt.width, alt.height, MAGBORD, 0, /* depth from parent */ InputOutput, (Visual *) CopyFromParent, CWSaveUnder | CWBorderPixel | CWBackPixel | CWOverrideRedirect, &attr); XSelectInput(DISP, alt.win, ExposureMask); XMapWindow(DISP, alt.win); /***************************************************************** This call will draw the point rulers when the magnifier first pops up, if the XDvi*delayRulers resource is false. Some users may prefer rulers to remain invisible until the magnifier is moved, so the default is true. Rulers can be suppressed entirely by setting the XDvi*tickLength resource to zero or negative. It is better to use highGC for draw_rulers() than foreGC, because this allows the ruler to be drawn in a different color, helping to distinguish ruler ticks from normal typeset text. *****************************************************************/ if (!delay_rulers) draw_rulers(alt.width, alt.height, highGC); alt_stat = 1; /* waiting for exposure */ } } #ifdef TOOLKIT #undef event /*ARGSUSED*/ void handle_motion(widget, junk, ev, cont) Widget widget; XtPointer junk; XEvent *ev; #define event (&(ev->xmotion)) Boolean *cont; /* unused */ { #ifdef HTEX int x, y; /* APS Modification required because of changes in motion events selected: */ /* We asked only for hints, so check where pointer is: */ if (pointerlocate(&x, &y)) { if ((event->state&(Button1Mask|Button2Mask|Button3Mask| Button4Mask|Button5Mask)) == 0) { htex_displayanchor(current_page, x, y); return; } } #endif new_mag_x = event->x; main_x = event->x_root - new_mag_x; new_mag_y = event->y; main_y = event->y_root - new_mag_y; mag_moved = (new_mag_x != mag_x || new_mag_y != mag_y); } #undef event #endif /* TOOLKIT */ static void movemag(x, y) int x, y; { int xx, yy; mag_x = x; mag_y = y; if (mag_x == new_mag_x && mag_y == new_mag_y) mag_moved = False; compute_mag_pos(&xx, &yy); XMoveWindow(DISP, alt.win, xx, yy); scrollwindow(&alt, (x + mane_base_x) * mane.shrinkfactor - (int) alt.width/2, (y + mane_base_y) * mane.shrinkfactor - (int) alt.height/2); draw_rulers(alt.width, alt.height, highGC); } #ifdef TOOLKIT /*ARGSUSED*/ void handle_release(widget, junk, ev, cont) Widget widget; XtPointer junk; XEvent *ev; #define event (&(ev->xbutton)) Boolean *cont; /* unused */ #else /* !TOOLKIT */ void handle_release() #endif /* TOOLKIT */ { if (alt.win != (Window) 0) if (alt_stat) alt_stat = -1; /* destroy upon expose */ else { XDestroyWindow(DISP, alt.win); if (currwin.win == alt.win) alt_canit = True; alt.win = (Window) 0; mag_moved = False; can_exposures(&alt); } } #ifdef TOOLKIT #undef event /*ARGSUSED*/ void handle_exp(widget, closure, ev, cont) Widget widget; XtPointer closure; register XEvent *ev; #define event (&(ev->xexpose)) Boolean *cont; /* unused */ { struct WindowRec *windowrec = (struct WindowRec *) closure; if (windowrec == &alt) if (alt_stat < 0) { /* destroy upon exposure */ alt_stat = 0; handle_release(widget, (caddr_t) NULL, ev, (Boolean *) NULL); return; } else alt_stat = 0; expose(windowrec, event->x, event->y, (unsigned int) event->width, (unsigned int) event->height); } #undef event #endif /* TOOLKIT */ void showmessage(message) _Xconst char *message; { get_xy(); XDrawImageString(DISP, mane.win, foreGC, 5 - window_x, 5 + X11HEIGHT - window_y, message, strlen(message)); } /* ||| * Currently the event handler does not coordinate XCopyArea requests * with GraphicsExpose events. This can lead to problems if the window * is partially obscured and one, for example, drags a scrollbar. */ static void keystroke(ch, number0, arg0, eventp) char ch; int number0; Boolean arg0; XEvent *eventp; { static int last_number = 0; /* memory for Again command */ static char last_ch = '\0'; /* ditto */ static Boolean last_arg = False; /* ditto */ int next_page; #ifdef TOOLKIT Window ww; #endif next_page = current_page; #if DEBUG if (isprint(ch)) fprintf(stderr,"<%c>",(int)ch); else fprintf(stderr,"<%03o>",(int)ch); #endif if (ch == '\001') /* Ctl-A or Again */ { ch = last_ch; number0 = last_number; arg0 = last_arg; } else /* remember key and arg for Again command */ { last_ch = ch; last_number = number0; last_arg = arg0; } switch (ch) { case 'q': case 'Q': case '\003': /* control-C */ case '\004': /* control-D */ #ifdef VMS case '\032': /* control-Z */ #endif #if PS ps_destroy(); #endif exit((ch == 'Q') ? 2 : 0); case 'n': case 'f': case ' ': case '\r': case '\n': /* scroll forward; i.e. go to relative page */ next_page = current_page + (arg0 ? number0 : 1); break; #ifdef HTEX case 'F': /* Follow link forward! */ { int x, y; if (pointerlocate(&x, &y)) { /* screen_to_page(&mane,s_x,s_y,&page,&px,&py); */ (void) htex_handleref(current_page, x, y); } } return; /* Should goto bad if problem arises? */ case 'B': /* Go back to previous anchor. */ htex_goback(); /* Should goto bad if problem arises? */ return; #endif case 'p': case 'b': case '\b': case '\177': /* Del */ /* scroll backward */ next_page = current_page - (arg0 ? number0 : 1); break; case '<': next_page = 0; break; case 'g': case 'j': case '>': /* go to absolute page (last by default) */ next_page = (arg0 ? number0 - pageno_correct : total_pages - 1); break; case '?': case 'h': case 'H': /* Help */ show_help(); return; case 'P': /* declare current page */ pageno_correct = arg0 * number0 - current_page; return; case 'k': /* toggle keep-position flag */ resource.keep_flag = (arg0 ? number0 : !resource.keep_flag); return; case '\f': /* redisplay current page */ break; case '^': home(True); return; #ifdef TOOLKIT case 'l': if (!x_bar) goto bad; XtCallCallbacks(x_bar, XtNscrollProc, (XtPointer) (-2 * (int) clip_w / 3)); return; case 'r': if (!x_bar) goto bad; XtCallCallbacks(x_bar, XtNscrollProc, (XtPointer) (2 * (int) clip_w / 3)); return; case 'u': if (!y_bar) goto bad; XtCallCallbacks(y_bar, XtNscrollProc, (XtPointer) (-2 * (int) clip_h / 3)); return; case 'd': if (!y_bar) goto bad; XtCallCallbacks(y_bar, XtNscrollProc, (XtPointer) (2 * (int) clip_h / 3)); return; case 'c': center(eventp->xkey.x, eventp->xkey.y); return; case 'M': (void) XTranslateCoordinates(DISP, eventp->xkey.window, mane.win, eventp->xkey.x, eventp->xkey.y, &home_x, &home_y, &ww); /* throw away last argument */ home_x *= mane.shrinkfactor; home_y *= mane.shrinkfactor; return; #ifdef BUTTONS case 'x': /* modified based on xdvi 20.55 */ if (arg0 && resource.expert == (number0 != 0)) return; if (resource.expert) { /* create buttons */ resource.expert = False; if (destroy_count != 0) return; XtSetValues(vport_widget, resizable_on, XtNumber(resizable_on)); XdviResizeWidget(vport_widget, window_w -= XTRA_WID, window_h); create_buttons((XtArgVal) window_h); } else { /* destroy buttons */ resource.expert = True; if (destroy_count != 0) return; destroy_count = 2; XtAddCallback(panel_widget, XtNdestroyCallback, handle_destroy_buttons, (XtPointer) 0); XtAddCallback(line_widget, XtNdestroyCallback, handle_destroy_buttons, (XtPointer) 0); XtDestroyWidget(panel_widget); XtDestroyWidget(line_widget); window_w += XTRA_WID; } return; #endif /* BUTTONS */ #else /* !TOOLKIT */ case 'l': if (mane.base_x <= 0) goto bad; scrollmane(mane.base_x - 2 * (int) clip_w / 3, mane.base_y); return; case 'r': if (mane.base_x >= page_w - clip_w) goto bad; scrollmane(mane.base_x + 2 * (int) clip_w / 3, mane.base_y); return; case 'u': if (mane.base_y <= 0) goto bad; scrollmane(mane.base_x, mane.base_y - 2 * (int) clip_h / 3); return; case 'd': if (mane.base_y >= page_h - clip_h) goto bad; scrollmane(mane.base_x, mane.base_y + 2 * (int) clip_h / 3); return; case 'c': /* unchecked scrollmane() */ scrollwindow(&mane, mane.base_x + eventp->xkey.x - clip_w/2, mane.base_y + eventp->xkey.y - clip_h/2); if (x_bar) paint_x_bar(); if (y_bar) paint_y_bar(); XWarpPointer(DISP, None, None, 0, 0, 0, 0, clip_w/2 - eventp->xkey.x, clip_h/2 - eventp->xkey.y); return; case 'M': home_x = (eventp->xkey.x - (y_bar ? BAR_THICK : 0) + mane.base_x) * mane.shrinkfactor; home_y = (eventp->xkey.y - (x_bar ? BAR_THICK : 0) + mane.base_y) * mane.shrinkfactor; return; #endif /* TOOLKIT */ case '\020': /* Control P */ Printf("Unit = %d, bitord = %d, byteord = %d\n", BitmapUnit(DISP), BitmapBitOrder(DISP), ImageByteOrder(DISP)); return; case 's': if (!arg0) { int temp; number0 = ROUNDUP(unshrunk_page_w, window_w - 2); temp = ROUNDUP(unshrunk_page_h, window_h - 2); if (number0 < temp) number0 = temp; } if (number0 <= 0) goto bad; if (number0 == mane.shrinkfactor) return; mane.shrinkfactor = number0; init_page(); if (number0 != 1 && number0 != bak_shrink) { bak_shrink = number0; #ifdef GREY if (use_grey) init_pix(False); #endif reset_fonts(); } reconfig(); home(False); break; case 'S': if (!arg0) goto bad; #ifdef GREY if (use_grey) { float newgamma = number0 != 0 ? number0 / 100.0 : 1.0; if (newgamma == gamma) return; gamma = newgamma; init_pix(False); return; } #endif if (number0 < 0) goto bad; if (number0 == density) return; density = number0; reset_fonts(); if (mane.shrinkfactor == 1) return; break; case 't': { /* toggle through magnifier ruler tick units */ int k = 0; static char *TeX_units[] = { "bp", "cc", "cm", "dd", "in", "mm", "pc", "pt", "sp", }; for (k = 0; k < sizeof(TeX_units)/sizeof(TeX_units[0]); ++k) if (strcmp(tick_units,TeX_units[k]) == 0) break; k++; if (k >= sizeof(TeX_units)/sizeof(TeX_units[0])) k = 0; tick_units = TeX_units[k]; Printf("Ruler units = %s\n", tick_units); } return; #ifdef GREY case 'G': use_grey = (arg0 ? number0 : !use_grey); if (use_grey) init_pix(False); reset_fonts(); break; #endif #ifdef GRID case 'D': grid_mode = (arg0 ? number0 : !grid_mode ); init_page(); reconfig(); break; #endif /* GRID */ #if PS case 'v': if (!arg0 || resource._postscript != !number0) { resource._postscript = !resource._postscript; if (resource._postscript) scanned_page = scanned_page_bak; psp.toggle(); } break; #endif #ifdef SELFILE case '\006': /* control-f */ ++dvi_time ; /* notice we want a new file in check_dvi_file */ break ; #endif /* SELFILE */ case 'R': /* reread DVI file */ --dvi_time; /* then it will notice a change */ break; default: goto bad; } if (0 <= next_page && next_page < total_pages) { if (current_page != next_page) { current_page = next_page; hush_spec_now = hush_spec; if (!resource.keep_flag) home(False); } canit = True; XFlush(DISP); return; /* Don't use longjmp here: it might be called from * within the toolkit, and we don't want to longjmp out * of Xt routines. */ } bad: XBell(DISP, 10); } void read_events(wait) wide_bool wait; { XEvent event; alt_canit = False; for (;;) { event_counter = event_freq; /* * The above line clears the flag indicating that an event is * pending. So if an event comes in right now, the flag will be * set again needlessly, but we just end up making an extra call. * Also, be careful about destroying the magnifying glass while * writing it. */ if (!XtPending() && (!wait || canit || mane.min_x < MAXDIM || alt.min_x < MAXDIM || mag_moved)) { if (!wait && (canit | alt_canit)) { #if PS psp.interrupt(); #endif if (allow_can) longjmp(canit_env, 1); } return; } #ifdef TOOLKIT XtNextEvent(&event); if (resized) get_geom(); if (event.xany.window == alt.win && event.type == Expose) { handle_exp((Widget) NULL, (XtPointer) &alt, &event, (Boolean *) NULL); continue; } (void) XtDispatchEvent(&event); #else /* !TOOLKIT */ XNextEvent(DISP, &event); if (event.xany.window == mane.win || event.xany.window == alt.win) { struct WindowRec *wr = &mane; if (event.xany.window == alt.win) { wr = &alt; /* check in case we already destroyed the window */ if (alt_stat < 0) { /* destroy upon exposure */ alt_stat = 0; handle_release(); continue; } else alt_stat = 0; } switch (event.type) { case GraphicsExpose: case Expose: expose(wr, event.xexpose.x, event.xexpose.y, event.xexpose.width, event.xexpose.height); break; case MotionNotify: #ifdef HTEX /* APS Only using motion hints, so get the last pointer location: */ while (XCheckMaskEvent(DISP, PointerMotionMask, &event)); if ((keys_buttons&(Button1Mask|Button2Mask|Button3Mask| Button4Mask|Button5Mask)) == 0) { /* None of the buttons was down, so this isn't a mag motion event: */ int x, y; if (!pointerlocate(&x, &y)) break; htex_displayanchor(current_page, x, y); break; } #endif new_mag_x = event.xmotion.x; new_mag_y = event.xmotion.y; mag_moved = (new_mag_x != mag_x || new_mag_y != mag_y); break; case ButtonPress: handle_button(&event.xbutton); break; case ButtonRelease: handle_release(); break; } /* end switch */ } /* end if window == {mane,alt}.win */ else if (event.xany.window == x_bar) { if (event.type == Expose) XFillRectangle(DISP, x_bar, ruleGC, x_bgn, 1, x_end - x_bgn, BAR_WID); else if (event.type == MotionNotify) scrollmane(event.xmotion.x * page_w / clip_w, mane.base_y); else switch (event.xbutton.button) { case 1: scrollmane(mane.base_x + event.xbutton.x, mane.base_y); break; case 2: scrollmane(event.xbutton.x * page_w / clip_w, mane.base_y); break; case 3: scrollmane(mane.base_x - event.xbutton.x, mane.base_y); } } else if (event.xany.window == y_bar) { if (event.type == Expose) XFillRectangle(DISP, y_bar, ruleGC, 1, y_bgn, BAR_WID, y_end - y_bgn); else if (event.type == MotionNotify) scrollmane(mane.base_x, event.xmotion.y * page_h / clip_h); else switch (event.xbutton.button) { case 1: scrollmane(mane.base_x, mane.base_y + event.xbutton.y); break; case 2: scrollmane(mane.base_x, event.xbutton.y * page_h / clip_h); break; case 3: scrollmane(mane.base_x, mane.base_y - event.xbutton.y); } } else if (event.xany.window == top_level) switch (event.type) { case ConfigureNotify: if (event.xany.window == top_level && (event.xconfigure.width != window_w || event.xconfigure.height != window_h)) { register Window old_mane_win = mane.win; window_w = event.xconfigure.width; window_h = event.xconfigure.height; reconfig(); if (old_mane_win == (Window) 0) home(False); } break; case MapNotify: /* if running w/o WM */ if (mane.win == (Window) 0) { reconfig(); home(False); } break; case KeyPress: handle_key(&event); break; } #endif /* TOOLKIT */ } } static void redraw(windowrec) struct WindowRec *windowrec; { currwin = *windowrec; min_x = currwin.min_x + currwin.base_x; min_y = currwin.min_y + currwin.base_y; max_x = currwin.max_x + currwin.base_x; max_y = currwin.max_y + currwin.base_y; can_exposures(windowrec); if (debug & DBG_EVENT) Printf("Redraw %d x %d at (%d, %d) (base=%d,%d)\n", max_x - min_x, max_y - min_y, min_x, min_y, currwin.base_x, currwin.base_y); XDefineCursor(DISP, mane.win, redraw_cursor); XFlush(DISP); if (setjmp(dvi_env)) { XClearWindow(DISP, mane.win); showmessage(dvi_oops_msg); if (dvi_file) { Fclose(dvi_file); dvi_file = NULL; } } else { draw_page(); hush_spec_now = True; } } void redraw_page() { if (debug & DBG_EVENT) Fputs("Redraw page: ", stdout); XClearWindow(DISP, mane.win); if (backing_store != NotUseful) { mane.min_x = mane.min_y = 0; mane.max_x = page_w; mane.max_y = page_h; } else { get_xy(); mane.min_x = -window_x; mane.max_x = -window_x + clip_w; mane.min_y = -window_y; mane.max_y = -window_y + clip_h; } redraw(&mane); } /* * Interrupt system for receiving events. The program sets a flag * whenever an event comes in, so that at the proper time (i.e., when * reading a new dvi item), we can check incoming events to see if we * still want to go on printing this page. This way, one can stop * displaying a page if it is about to be erased anyway. We try to read * as many events as possible before doing anything and base the next * action on all events read. * Note that the Xlib and Xt routines are not reentrant, so the most we * can do is set a flag in the interrupt routine and check it later. * Also, sometimes the interrupts are not generated (some systems only * guarantee that SIGIO is generated for terminal files, and on the system * I use, the interrupts are not generated if I use "(xdvi foo &)" instead * of "xdvi foo"). Therefore, there is also a mechanism to check the * event queue every 70 drawing operations or so. This mechanism is * disabled if it turns out that the interrupts do work. * For a fuller discussion of some of the above, see xlife in * comp.sources.x. */ static void can_exposures(windowrec) struct WindowRec *windowrec; { windowrec->min_x = windowrec->min_y = MAXDIM; windowrec->max_x = windowrec->max_y = 0; } #if HAS_SIGIO /* ARGSUSED */ static RETSIGTYPE handle_intr(signo) int signo; { event_counter = 1; event_freq = -1; /* forget Plan B */ } static void enable_intr() { int socket = ConnectionNumber(DISP); #ifdef SA_RESTART /* Subprocess handling, e.g., MakeTeXPK, fails on the Alpha without this, because SIGIO interrupts the call of system(3), since OSF/1 doesn't retry interrupted wait calls by default. From code by maj@cl.cam.ac.uk. */ { struct sigaction a; a.sa_handler = handle_intr; sigemptyset(&a.sa_mask); sigaddset(&a.sa_mask, SIGIO); a.sa_flags = SA_RESTART; sigaction(SIGIO, &a, NULL); } #else (void) signal(SIGIO, handle_intr); #endif /* SA_RESTART */ (void) fcntl(socket, F_SETOWN, getpid()); (void) fcntl(socket, F_SETFL, fcntl(socket, F_GETFL, 0) | FASYNC); } #endif /* HAS_SIGIO */ void do_pages() { if (debug & DBG_BATCH) { #ifdef TOOLKIT while (mane.min_x == MAXDIM) read_events(True); #else /* !TOOLKIT */ while (mane.min_x == MAXDIM) if (setjmp(canit_env)) break; else read_events(True); #endif /* TOOLKIT */ for (current_page = 0; current_page < total_pages; ++current_page) { #ifdef __convex__ /* convex C turns off optimization for the entire function if setjmp return value is discarded.*/ if (setjmp(canit_env)) /*optimize me*/; #else (void) setjmp(canit_env); #endif canit = False; redraw_page(); } } else { /* normal operation */ #if HAS_SIGIO enable_intr(); #endif #ifdef __convex__ /* convex C turns off optimization for the entire function if setjmp return value is discarded.*/ if (setjmp(canit_env)) /*optimize me*/; #else (void) setjmp(canit_env); #endif for (;;) { if (mane.win != (Window) 0) XDefineCursor(DISP, mane.win, ready_cursor); read_events(True); if (canit) { canit = False; can_exposures(&mane); can_exposures(&alt); redraw_page(); } else if (mag_moved) { if (alt.win == (Window) 0) mag_moved = False; else if (abs(new_mag_x - mag_x) > 2 * abs(new_mag_y - mag_y)) movemag(new_mag_x, mag_y); else if (abs(new_mag_y - mag_y) > 2 * abs(new_mag_x - mag_x)) movemag(mag_x, new_mag_y); else movemag(new_mag_x, new_mag_y); } else if (alt.min_x < MAXDIM) redraw(&alt); else if (mane.min_x < MAXDIM) redraw(&mane); XFlush(DISP); } } }