/*========================================================================*\ Copyright (c) 1990-1999 Paul Vojta Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL PAUL VOJTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. NOTE: xdvi is based on prior work, as noted in the modification history in xdvi.c. \*========================================================================*/ #include "xdvi-config.h" /* 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 #ifndef MOTIF #include #ifdef HTEX #include #include #endif #else /* MOTIF */ #include #include #include #include #endif /* MOTIF */ #ifdef BUTTONS #ifndef MOTIF #include #define PANEL_WIDGET_CLASS compositeWidgetClass #define BUTTON_WIDGET_CLASS commandWidgetClass #else /* MOTIF */ #include #include #include #define PANEL_WIDGET_CLASS xmBulletinBoardWidgetClass #define BUTTON_WIDGET_CLASS xmPushButtonWidgetClass #endif /* MOTIF */ #endif /* BUTTONS */ #else /* XtSpecificationRelease < 4 */ #define XtPointer caddr_t #include #ifdef BUTTONS #include #define PANEL_WIDGET_CLASS compositeWidgetClass #define BUTTON_WIDGET_CLASS commandWidgetClass #endif #endif /* XtSpecificationRelease */ #else /* not TOOLKIT */ typedef int Position; #define XtPending() XPending(DISP) #endif /* not TOOLKIT */ #include #include /* this defines FASYNC */ #if !defined(FLAKY_SIGPOLL) && !HAVE_STREAMS && !defined(FASYNC) #define FLAKY_SIGPOLL 1 #endif #ifndef FLAKY_SIGPOLL #ifndef SIGPOLL #define SIGPOLL SIGIO #endif #ifndef SA_RESTART #define SA_RESTART 0 #endif #if HAVE_STREAMS #include #ifndef S_RDNORM #define S_RDNORM S_INPUT #endif #ifndef S_RDBAND #define S_RDBAND 0 #endif #ifndef S_HANGUP #define S_HANGUP 0 #endif #ifndef S_WRNORM #define S_WRNORM S_OUTPUT #endif #endif /* HAVE_STREAMS */ #endif /* not FLAKY_SIGPOLL */ #if HAVE_POLL # include #else # if HAVE_SYS_SELECT_H # include # else # if HAVE_SELECT_H # include # endif # endif #endif #include #ifdef X_NOT_STDC_ENV extern int errno; #endif /* X_NOT_STDC_ENV */ #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 #define high_Pixel resource._high_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; static Boolean busycurs = False; #ifndef FLAKY_SIGPOLL sigset_t sigpollusrterm; #endif #if HAVE_POLL static struct pollfd fds[1] = {{0, POLLIN, 0}}; #else static fd_set readfds; #endif #ifdef TOOLKIT #ifdef BUTTONS static Widget line_widget; static Widget panel_widget; static int destroy_count = 0; #endif /* BUTTONS */ #ifndef MOTIF static Widget x_bar, y_bar; /* horizontal and vertical scroll bars */ #endif 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 #ifndef MOTIF static Arg resizable_on[] = { {XtNresizable, (XtArgVal) True}, }; static Arg resizable_off[] = { {XtNresizable, (XtArgVal) False}, }; #endif static Arg line_args[] = { {XtNbackground, (XtArgVal) 0}, {XtNwidth, (XtArgVal) 1}, #ifndef MOTIF {XtNheight, (XtArgVal) 0}, {XtNfromHoriz, (XtArgVal) NULL}, {XtNborderWidth, (XtArgVal) 0}, {XtNtop, (XtArgVal) XtChainTop}, {XtNbottom, (XtArgVal) XtChainBottom}, {XtNleft, (XtArgVal) XtChainRight}, {XtNright, (XtArgVal) XtChainRight}, #else /* MOTIF */ {XmNleftWidget, (XtArgVal) NULL}, {XmNleftAttachment, (XtArgVal) XmATTACH_WIDGET}, {XmNtopAttachment, (XtArgVal) XmATTACH_FORM}, {XmNbottomAttachment, (XtArgVal) XmATTACH_FORM}, #endif /* MOTIF */ }; static Arg panel_args[] = { {XtNwidth, (XtArgVal) (XTRA_WID - 1)}, #ifndef MOTIF {XtNheight, (XtArgVal) 0}, {XtNborderWidth, (XtArgVal) 0}, {XtNfromHoriz, (XtArgVal) NULL}, {XtNtop, (XtArgVal) XtChainTop}, {XtNbottom, (XtArgVal) XtChainBottom}, {XtNleft, (XtArgVal) XtChainRight}, {XtNright, (XtArgVal) XtChainRight}, #else /* MOTIF */ {XmNleftAttachment, (XtArgVal) XmATTACH_FORM}, {XmNtopAttachment, (XtArgVal) XmATTACH_FORM}, {XmNbottomAttachment, (XtArgVal) XmATTACH_FORM}, #endif /* MOTIF */ }; 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)}, {"100%", "sh1", 1 << 8 | 's', BPOS(7)}, #define LOWRES_s_COMMANDS 6 /* Good for 300dpi */ {"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 /* Good for 600dpi */ {"33%", "sh2", 3 << 8 | 's', BPOS(8)}, {"25%", "sh3", 4 << 8 | 's', BPOS(9)}, {"17%", "sh4", 6 << 8 | 's', BPOS(10)}, /* What's good for 1200dpi? */ #define PAGE_BUTTONS 12 {"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[] = { #ifndef MOTIF {XtNlabel, (XtArgVal) NULL}, #else {XmNlabelString, (XtArgVal) NULL}, #endif {XtNx, (XtArgVal) 6}, {XtNy, (XtArgVal) 0}, #ifndef MOTIF {XtNwidth, (XtArgVal) 64}, #else {XtNwidth, (XtArgVal) 90}, #endif {XtNheight, (XtArgVal) 30}, #ifndef MOTIF {XtNcallback, (XtArgVal) command_call}, #else {XmNactivateCallback, (XtArgVal) command_call}, #endif }; void create_buttons(h) XtArgVal h; { int i; line_args[0].value = (XtArgVal) resource._hl_Pixel; #ifndef MOTIF 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[1].value = h; panel_args[3].value = (XtArgVal) line_widget; #endif panel_widget = XtCreateManagedWidget("panel", PANEL_WIDGET_CLASS, form_widget, panel_args, XtNumber(panel_args)); /* This adjusts the command table according to any shrinkbutton resources */ for (i = 0; i <= XtNumber(command_table) - 4; ++i) { if (strncmp(command_table[i].name, "sh1",2) == 0) { /* It's a shrink command. Check if the resources tell us to modify it, and how */ int j,k; j = atoi(&command_table[i].name[2]); k = resource.shrinkbutton[j-1]; if (k != 0) { char *s = xmalloc(9); if (k < 1) k = 1; else if (k > 99) k = 99; if (k<16) { Sprintf(s, "%d%%", (int) 100/k); } else { /* Need more precition */ Sprintf(s, "%.2f%%", (double) 100/k); } command_table[i].label = s; command_table[i].closure = k << 8 | 's'; } /* if k != 0 */ } /* if strncmp */ } /* For */ command_args[2].value = (XtArgVal) vport_widget; /* This loop sets up the buttons */ 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+=3; #ifndef MOTIF command_args[0].value = (XtArgVal) command_table[i].label; #else /* MOTIF */ command_args[0].value = (XtArgVal) XmCvtCTToXmString((char *) command_table[i].label); #endif /* MOTIF */ 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, BUTTON_WIDGET_CLASS, panel_widget, command_args, XtNumber(command_args)); } #ifdef MOTIF line_args[2].value = (XtArgVal) panel_widget; line_widget = XtCreateManagedWidget("line", widgetClass, form_widget, line_args, XtNumber(line_args)); XtVaSetValues(vport_widget, XmNleftAttachment, XmATTACH_WIDGET, XmNleftWidget, line_widget, NULL); #endif } #endif /* BUTTONS */ #else /* !TOOLKIT */ static Window x_bar, y_bar; static int x_bgn, x_end, y_bgn, y_end; /* scrollbar positions */ #endif /* TOOLKIT */ /* 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.", "", "V Toggles Ghostscript anti-aliasing. Also `0V' and `1V' clear", " and enables this mode, respectively. See also the the -gsalpha", " 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]); } /* * 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. */ #ifndef FLAKY_SIGPOLL static VOLATILE short event_freq = 70; #else #define event_freq 70 #endif static void can_exposures(), keystroke(); #ifdef GREY #define gamma resource._gamma static void mask_shifts(mask, pshift1, pshift2) Pixel mask; int *pshift1, *pshift2; { int k, l; for (k = 0; (mask & 1) == 0; ++k) mask >>= 1; for (l = 0; (mask & 1) == 1; ++l) mask >>= 1; *pshift1 = sizeof(short) * 8 - l; *pshift2 = k; } /* * Try to allocate 4 color planes for 16 colors (for GXor drawing) */ void init_plane_masks() { Pixel pixel; if (copy || plane_masks[0] != 0) return; if (XAllocColorCells(DISP, our_colormap, False, plane_masks, 4, &pixel, 1)) { /* Make sure fore_Pixel and back_Pixel are a part of the palette */ back_Pixel = pixel; fore_Pixel = pixel | plane_masks[0] | plane_masks[1] | plane_masks[2] | plane_masks[3]; if (mane.win != (Window) 0) XSetWindowBackground(DISP, mane.win, back_Pixel); } else { copy = True; puts("\ Greyscaling is running in copy mode: your display can only display\n\ a limited number of colors at a time (typically 256), and other applications\n\ (such as netscape) are using many of them. Running in copy mode will\n\ cause overstrike characters to appear incorrectly, and may result in\n\ poor display quality.\n\ \n\ See the section ``GREYSCALING AND COLORMAPS'' in the xdvi manual page\n\ for more details."); fflush(stdout); /* useful if called by netscape */ } } extern double pow(); #ifndef TOOLKIT #define XtWindow(win) win #endif #define MakeGC(fcn, fg, bg) (values.function = fcn, \ values.foreground=fg, values.background=bg, \ XCreateGC(DISP, XtWindow(top_level), \ GCFunction | GCForeground | GCBackground, &values)) void init_pix() { static int shrink_allocated_for = 0; static float oldgamma = 0.0; static Pixel palette[17]; XGCValues values; int i; if (fore_color_data.pixel == back_color_data.pixel) { /* get foreground and background RGB values for interpolating */ fore_color_data.pixel = fore_Pixel; XQueryColor(DISP, our_colormap, &fore_color_data); back_color_data.pixel = back_Pixel; XQueryColor(DISP, our_colormap, &back_color_data); } if (our_visual->class == TrueColor) { /* This mirrors the non-grey code in xdvi.c */ static int shift1_r, shift1_g, shift1_b; static int shift2_r, shift2_g, shift2_b; static Pixel set_bits; static Pixel clr_bits; unsigned int sf_squared; if (oldgamma == 0.0) { mask_shifts(our_visual->red_mask, &shift1_r, &shift2_r); mask_shifts(our_visual->green_mask, &shift1_g, &shift2_g); mask_shifts(our_visual->blue_mask, &shift1_b, &shift2_b); set_bits = fore_color_data.pixel & ~back_color_data.pixel; clr_bits = back_color_data.pixel & ~fore_color_data.pixel; if (set_bits & our_visual->red_mask) set_bits |= our_visual->red_mask; if (clr_bits & our_visual->red_mask) clr_bits |= our_visual->red_mask; if (set_bits & our_visual->green_mask) set_bits |= our_visual->green_mask; if (clr_bits & our_visual->green_mask) clr_bits |= our_visual->green_mask; if (set_bits & our_visual->blue_mask) set_bits |= our_visual->blue_mask; if (clr_bits & our_visual->blue_mask) clr_bits |= our_visual->blue_mask; /* * Make the GCs */ foreGC = foreGC2 = ruleGC = 0; copyGC = MakeGC(GXcopy, fore_Pixel, back_Pixel); if (copy || (set_bits && clr_bits)) { ruleGC = copyGC; if (!resource.thorough) copy = True; } if (copy) { foreGC = ruleGC; if (!resource.copy) Puts("Note: overstrike characters may be incorrect."); } else { if (set_bits) foreGC = MakeGC(GXor, set_bits & fore_color_data.pixel, 0); if (clr_bits || !set_bits) *(foreGC ? &foreGC2 : &foreGC) = MakeGC(GXandInverted, clr_bits & ~fore_color_data.pixel, 0); if (!ruleGC) ruleGC = foreGC; } oldgamma = gamma; } if (mane.shrinkfactor == 1) return; sf_squared = mane.shrinkfactor * mane.shrinkfactor; if (shrink_allocated_for < mane.shrinkfactor) { if (pixeltbl != NULL) { free((char *) pixeltbl); if (pixeltbl_t != NULL) free((char *) pixeltbl_t); } pixeltbl = xmalloc((sf_squared + 1) * sizeof(Pixel)); if (foreGC2 != NULL) pixeltbl_t = xmalloc((sf_squared + 1) * sizeof(Pixel)); shrink_allocated_for = mane.shrinkfactor; } /* * Compute pixel values directly. */ #define SHIFTIFY(x, shift1, shift2) ((((Pixel)(x)) >> (shift1)) << (shift2)) for (i = 0; i <= sf_squared; ++i) { double frac = gamma > 0 ? pow((double) i / sf_squared, 1 / gamma) : 1 - pow((double) (sf_squared - i) / sf_squared, -gamma); unsigned int red, green, blue; Pixel pixel; red = frac * ((double) fore_color_data.red - back_color_data.red) + back_color_data.red; green = frac * ((double) fore_color_data.green - back_color_data.green) + back_color_data.green; blue = frac * ((double) fore_color_data.blue - back_color_data.blue) + back_color_data.blue; pixel = SHIFTIFY(red, shift1_r, shift2_r) | SHIFTIFY(green, shift1_g, shift2_g) | SHIFTIFY(blue, shift1_b, shift2_b); if (copy) pixeltbl[i] = pixel; else { pixeltbl[i] = set_bits ? pixel & set_bits : ~pixel & clr_bits; if (pixeltbl_t != NULL) pixeltbl_t[i] = ~pixel & clr_bits; } } #undef SHIFTIFY return; } /* if not TrueColor ... */ if (gamma != oldgamma) { XColor color; if (oldgamma == 0.0) init_plane_masks(); 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) fore_color_data.red - back_color_data.red) + back_color_data.red; color.green = frac * ((double) fore_color_data.green - back_color_data.green) + back_color_data.green; color.blue = frac * ((double) fore_color_data.blue - back_color_data.blue) + back_color_data.blue; color.pixel = back_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, our_colormap, &color); palette[i] = color.pixel; } else { if (XAllocColor(DISP, our_colormap, &color)) palette[i] = color.pixel; else palette[i] = (i * 100 >= density * 15) ? fore_Pixel : back_Pixel; } } copyGC = MakeGC(GXcopy, fore_Pixel, back_Pixel); foreGC = ruleGC = copy ? copyGC : MakeGC(GXor, fore_Pixel, back_Pixel); foreGC2 = 0; oldgamma = gamma; } if (mane.shrinkfactor == 1) return; if (shrink_allocated_for < mane.shrinkfactor) { if (pixeltbl != NULL) free((char *) pixeltbl); pixeltbl = xmalloc((unsigned) (mane.shrinkfactor * mane.shrinkfactor + 1) * sizeof(Pixel)); 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)]; } #undef MakeGC void init_colors() { static Boolean warn_done = False; Boolean warn = False; copy = resource.copy; #ifdef GREY if (use_grey) init_pix(); else #endif { XGCValues values; Pixel set_bits = (Pixel) (fore_Pixel & ~back_Pixel); Pixel clr_bits = (Pixel) (back_Pixel & ~fore_Pixel); if (copy == Maybe) copy = (!resource.thorough && DefaultDepthOfScreen(SCRN) > 1); #define MakeGC(fcn, fg, bg) (values.function = fcn, values.foreground=fg,\ values.background=bg,\ XCreateGC(DISP, RootWindowOfScreen(SCRN),\ GCFunction|GCForeground|GCBackground, &values)) foreGC = foreGC2 = ruleGC = NULL; if (copy || (set_bits && clr_bits)) ruleGC = MakeGC(GXcopy, fore_Pixel, back_Pixel); if (copy) foreGC = ruleGC; else if (!resource.thorough && ruleGC) { foreGC = ruleGC; warn = True; } else { if (set_bits) foreGC = MakeGC(GXor, set_bits, 0); if (clr_bits || !set_bits) *(foreGC ? &foreGC2 : &foreGC) = MakeGC(GXandInverted, clr_bits, 0); if (!ruleGC) ruleGC = foreGC; } } if (warn && !warn_done) { Puts("Note: overstrike characters may be incorrect."); warn_done = True; /* Print warning only once. */ } } /* * 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 */ } #undef MakeGC #endif /* GREY */ /* * Event-handling routines */ static void expose(windowrec, x, y, w, h) 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) 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, copyGC, 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 #ifdef MOTIF static int set_bar_value(bar, value, max) Widget bar; int value; int max; { XmScrollBarCallbackStruct call_data; if (value > max) value = max; if (value < 0) value = 0; call_data.value = value; XtVaSetValues(bar, XmNvalue, value, NULL); XtCallCallbacks(bar, XmNvalueChangedCallback, &call_data); return value; } #endif /* MOTIF */ /* not static because SELFILE stuff in dvi_init.c needs it */ void home(scrl) Boolean scrl; { #if PS psp.interrupt(); #endif if (!scrl) XUnmapWindow(DISP, mane.win); #ifndef MOTIF get_xy(); if (x_bar != NULL) { 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) { 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)); } #else /* MOTIF */ { int value; value = (page_w - clip_w) / 2; if (value > home_x / mane.shrinkfactor) value = home_x / mane.shrinkfactor; (void) set_bar_value(x_bar, value, (int) (page_w - clip_w)); value = (page_h - clip_h) / 2; if (value > home_y / mane.shrinkfactor) value = home_y / mane.shrinkfactor; (void) set_bar_value(y_bar, value, (int) (page_h - clip_h)); } #endif /* MOTIF */ if (!scrl) { XMapWindow(DISP, mane.win); /* Wait for the server to catch up---this eliminates flicker. */ XSync(DISP, False); } } #ifndef MOTIF /*ARGSUSED*/ static void handle_destroy_bar(w, client_data, call_data) Widget w; XtPointer client_data; XtPointer call_data; { * (Widget *) client_data = NULL; } #endif static Boolean resized = False; 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}, }; int old_clip_w; XtGetValues(vport_widget, arg_wh, XtNumber(arg_wh)); XtGetValues(clip_widget, arg_wh_clip, XtNumber(arg_wh_clip)); #ifndef MOTIF /* 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); } #endif 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; } /* * 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); } /*ARGSUSED*/ static void handle_destroy_buttons(w, client_data, call_data) Widget w; XtPointer client_data; XtPointer call_data; { if (--destroy_count != 0) return; #ifndef MOTIF 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); } #else /* MOTIF */ if (resource.expert) XtVaSetValues(vport_widget, XmNleftAttachment, XmATTACH_FORM, XmNleftOffset, 0, NULL); else { create_buttons((XtArgVal) 0); /* the argument is ignored */ window_w -= XTRA_WID; } #endif /* MOTIF */ } #endif /* BUTTONS */ void reconfig() { #ifdef BUTTONS #ifndef MOTIF XtSetValues(vport_widget, resizable_off, XtNumber(resizable_off)); #endif #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 = strchr(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 (strchr(cp,'\n') == NULL) { anchorsearchstring[len] = '\n'; anchorsearchstring[len+1] = '\0'; } len = strchr(anchorsearchstring,'\n') - anchorsearchstring + 1; add_search(anchorsearchstring, len); } #endif #else /* not 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() { int new_x_bgn = mane.base_x * clip_w / page_w; 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() { int new_y_bgn = mane.base_y * clip_h / page_h; 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; { int old_base_x = mane.base_x; 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 /* not TOOLKIT */ static void compute_mag_pos(xp, yp) int *xp, *yp; { 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 /* BEGIN CHUNK events.c 1 */ #ifdef SRC_SPECIALS #define src_jumpButton resource._src_jumpButton #endif /* END CHUNK events.c 1 */ #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; /* BEGIN CHUNK events.c 2 */ #ifdef SRC_SPECIALS /* If src specials are evaluated, make src_JumpButton jump to the next special. */ if (src_evalMode) { if (event->button == src_jumpButton) { src_find_special(1, event->x, event->y); return; } } #endif /* END CHUNK events.c 2 */ #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; #ifdef GREY attr.colormap = our_colormap; #endif alt.win = XCreateWindow(DISP, RootWindowOfScreen(SCRN), x, y, alt.width, alt.height, MAGBORD, our_depth, InputOutput, our_visual, CWSaveUnder | CWBorderPixel | CWBackPixel | #ifdef GREY CWColormap | #endif 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; 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 */ #ifdef MOTIF /* ARGSUSED */ void file_pulldown_callback(w, client_data, call_data) Widget w; XtPointer client_data; XtPointer call_data; { switch ((int) client_data) { case 0: keystroke('R', 0, False, (XEvent *) NULL); break; case 1: keystroke('q', 0, False, (XEvent *) NULL); break; } } /* ARGSUSED */ void navigate_pulldown_callback(w, client_data, call_data) Widget w; XtPointer client_data; XtPointer call_data; { switch ((int) client_data) { case 0: keystroke('p', 10, True, (XEvent *) NULL); break; case 1: keystroke('p', 5, True, (XEvent *) NULL); break; case 2: keystroke('p', 0, False, (XEvent *) NULL); break; case 3: keystroke('n', 0, False, (XEvent *) NULL); break; case 4: keystroke('n', 5, True, (XEvent *) NULL); break; case 5: keystroke('n', 10, True, (XEvent *) NULL); break; } } /* ARGSUSED */ void scale_pulldown_callback(w, client_data, call_data) Widget w; XtPointer client_data; XtPointer call_data; { int data = (int) client_data; if (data >= 0 && data < 4) keystroke('s', data + 1, True, (XEvent *) NULL); } void set_shrink_factor(shrink) int shrink; { static Widget active_shrink_button = NULL; Widget new_shrink_button; mane.shrinkfactor = shrink; new_shrink_button = (shrink > 0 && shrink <= XtNumber(shrink_button) ? shrink_button[shrink - 1] : NULL); if (new_shrink_button != active_shrink_button) { if (active_shrink_button != NULL) XmToggleButtonSetState(active_shrink_button, False, False); if (new_shrink_button != NULL) XmToggleButtonSetState(new_shrink_button, True, False); active_shrink_button = new_shrink_button; } } #endif /* MOTIF */ void showmessage(message) _Xconst char *message; { get_xy(); XDrawImageString(DISP, mane.win, copyGC, 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. */ #ifdef SRC_SPECIALS // TEST !!!!! extern void test_print_out_list ARGS((void)); extern void test_print_out_reversed_list ARGS((void)); #endif 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 */ /* BEGIN CHUNK events.c 3 */ int src_x, src_y; /* END CHUNK events.c 3 */ 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 #ifndef FLAKY_SIGPOLL if (debug & DBG_EVENT) puts(event_freq < 0 ? "SIGPOLL is working" : "no SIGPOLL signals received"); #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 #ifndef MOTIF 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': { int x, y; x = eventp->xkey.x - clip_w / 2; y = eventp->xkey.y - clip_h / 2; /* The clip widget gives a more exact value. */ if (x_bar != NULL) XtCallCallbacks(x_bar, XtNscrollProc, (XtPointer) x); if (y_bar != NULL) XtCallCallbacks(y_bar, XtNscrollProc, (XtPointer) y); XWarpPointer(DISP, None, None, 0, 0, 0, 0, -x, -y); } return; #else /* MOTIF */ case 'c': { int x, y; get_xy(); /* The clip widget gives a more exact value. */ x = eventp->xkey.x - clip_w / 2; y = eventp->xkey.y - clip_h / 2; x = set_bar_value(x_bar, x, (int) (page_w - clip_w)); y = set_bar_value(y_bar, y, (int) (page_h - clip_h)); XWarpPointer(DISP, None, None, 0, 0, 0, 0, -x - window_x, -y - window_y); } return; /* These four won't be needed once translations are put in. */ case 'l': get_xy(); (void) set_bar_value(x_bar, -2 * (int) clip_w / 3 - window_x, (int) (page_w - clip_w)); return; case 'r': get_xy(); (void) set_bar_value(x_bar, 2 * (int) clip_w / 3 - window_x, (int) (page_w - clip_w)); return; case 'u': get_xy(); (void) set_bar_value(y_bar, -2 * (int) clip_h / 3 - window_y, (int) (page_h - clip_h)); return; case 'd': get_xy(); (void) set_bar_value(y_bar, 2 * (int) clip_h / 3 - window_y, (int) (page_h - clip_h)); return; #endif /* MOTIF */ 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; /* BEGIN CHUNK events.c 4 */ #ifdef SRC_SPECIALS case 'X': (void) XTranslateCoordinates(DISP, eventp->xkey.window, mane.win, eventp->xkey.x, eventp->xkey.y, &src_x, &src_y, &ww); /* throw away last argument */ /* just highlight next special without calling editor for it */ src_find_special(0, src_x, src_y); return; /* or `break'? */ #endif /* END CHUNK events.c 4 */ #ifdef BUTTONS case 'x': if (arg0 && resource.expert == (number0 != 0)) return; if (resource.expert) { /* create buttons */ resource.expert = False; if (destroy_count != 0) return; #ifndef MOTIF XtSetValues(vport_widget, resizable_on, XtNumber(resizable_on)); XdviResizeWidget(vport_widget, window_w -= XTRA_WID, window_h); create_buttons((XtArgVal) window_h); #else /* MOTIF */ create_buttons((XtArgVal) 0); /* the argument is ignored */ window_w -= XTRA_WID; #endif /* MOTIF */ } 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 /* not 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; /* BEGIN CHUNK events.c 5 */ #ifdef SRC_SPECIALS case 'X': /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! * !!! WARNING: THIS IS UNTESTED !!! * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */ src_x = (eventp->xkey.x - (y_bar ? BAR_THICK : 0) + mane.base_x); src_y = (eventp->xkey.y - (x_bar ? BAR_THICK : 0) + mane.base_y); src_find_special(0, src_x, src_y); return; #endif /* SRC_SPECIALS */ /* END CHUNK events.c 5 */ #endif /* not TOOLKIT */ /* BEGIN CHUNK events.c 6 */ #ifdef SRC_SPECIALS /* * Control-S toggles visibility of src specials * (mnemonic for isearch in Emacs ;-) * Also changes the cursor to emphasize the new mode. */ case '\023': /* Control-S */ if (src_evalMode) { if (src_warn_verbosity >= SRC_WARNINGS_MEDIUM) { Fprintf(stdout, "SRC specials OFF\n"); } /* free src_arr */ src_cleanup(); src_evalMode = False; XDefineCursor(DISP, mane.win, ready_cursor); } else { if (src_warn_verbosity >= SRC_WARNINGS_MEDIUM) { Fprintf(stdout, "SRC specials ON\n"); } src_evalMode = True; /* used to have this in addition to emphasize the mode, * but usage seems more coherent without it: */ /* src_tickVisibility = True; */ XDefineCursor(DISP, mane.win, src_cursor); } redraw_page(); break; case 'T': /* * change shape of specials, but only when they're visible; * this makes the key usable for other purposes in ordinary mode. * However, it seems that in ordinary mode `T' already does the same * as Ctrl-p: print the Unit/bitord/byteord stuff; what's * the reason for this ??? */ if (src_evalMode) { src_tickShape++; if (src_tickShape > SPECIAL_SHAPE_MAX_NUM) { src_tickShape = 0; } if (src_warn_verbosity >= SRC_WARNINGS_MEDIUM) { Fprintf(stdout, "changing shape to \"%d\"\n", src_tickShape); } if (src_tickVisibility) { redraw_page(); } break; } #ifndef PS_GS case 'V': if (src_evalMode) { /* * toggle visibility of src specials */ if (src_tickVisibility) { if (src_warn_verbosity >= SRC_WARNINGS_MEDIUM) { Fprintf(stdout, "SRC special visibility OFF\n"); } src_tickVisibility = False; } else { if (src_warn_verbosity >= SRC_WARNINGS_MEDIUM) { Fprintf(stdout, "SRC special visibility ON\n"); } src_tickVisibility = True; } redraw_page(); return; } #endif /* PS_GS */ #endif /* SRC_SPECIALS */ /* END CHUNK events.c 6 */ 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); #ifndef MOTIF temp = ROUNDUP(unshrunk_page_h, window_h - 2); #else /* MOTIF */ { /* account for menubar */ static Dimension new_h; /* get rid of scrollbar */ XdviResizeWidget(draw_widget, 1, 1); XtVaGetValues(clip_widget, XtNheight, &new_h, NULL); temp = ROUNDUP(unshrunk_page_h, new_h - 2); } #endif /* MOTIF */ if (number0 < temp) number0 = temp; } if (number0 <= 0) goto bad; if (number0 == mane.shrinkfactor) return; #ifndef MOTIF mane.shrinkfactor = number0; #else set_shrink_factor(number0); #endif init_page(); if (number0 != 1 && number0 != bak_shrink) { bak_shrink = number0; #ifdef GREY if (use_grey) init_colors(); #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_colors(); 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_colors(); 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 */ #if PS_GS case 'V': /* BEGIN CHUNK events.c 7 */ #ifdef SRC_SPECIALS if (src_evalMode) { /* * toggle visibility of src specials */ if (src_tickVisibility) { if (src_warn_verbosity >= SRC_WARNINGS_MEDIUM) { Fprintf(stdout, "SRC special visibility OFF\n"); } src_tickVisibility = False; } else { if (src_warn_verbosity >= SRC_WARNINGS_MEDIUM) { Fprintf(stdout, "SRC special visibility ON\n"); } src_tickVisibility = True; } redraw_page(); return; } else { #endif /* END CHUNK events.c 7 */ if (!arg0 || resource.gs_alpha != !number0) resource.gs_alpha = !resource.gs_alpha; break; /* BEGIN CHUNK events.c 8 */ #ifdef SRC_SPECIALS } #endif /* END CHUNK events.c 8 */ #endif 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) { /* BEGIN CHUNK events.c 0 */ #ifdef SRC_SPECIALS src_delete_all_specials(); #endif /* END CHUNK events.c 0 */ current_page = next_page; warn_spec_now = warn_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); } /* * Since redrawing the screen is (potentially) a slow task, xdvi checks * for incoming events while this is occurring. It does not register * a work proc that draws and returns every so often, as the toolkit * documentation suggests. Instead, it checks for events periodically * (or not, if SIGPOLL can be used instead) and processes them in * a subroutine called by the page drawing routine. This routine (below) * checks to see if anything has happened and processes those events and * signals. (Or, if it is called when there is no redrawing that needs * to be done, it blocks until something happens.) */ void #if PS ps_read_events(wait, allow_can) wide_bool wait; wide_bool allow_can; #else read_events(wait) wide_bool wait; #define allow_can True #endif { 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 * drawing on it. */ #ifndef FLAKY_SIGPOLL if (event_freq < 0) { /* if SIGPOLL works */ if (!XtPending()) { sigset_t oldsig; (void) sigprocmask(SIG_BLOCK, &sigpollusrterm, &oldsig); if (terminate_flag) { #if PS ps_destroy(); #endif exit(0); } while (!XtPending()) { /* * The following code eliminates unnecessary calls to * XDefineCursor, since this is a slow operation on * some hardware (e.g., S3 chips). */ if (busycurs && wait && !canit && !mag_moved && alt.min_x == MAXDIM && mane.min_x == MAXDIM) { XSync(DISP, False); if (XtPending()) break; /* BEGIN CHUNK events.c 9 */ #ifdef SRC_SPECIALS if (src_evalMode) { XDefineCursor(DISP, mane.win, src_cursor); } else { #endif /* END CHUNK events.c 9 */ XDefineCursor(DISP, mane.win, ready_cursor); /* BEGIN CHUNK events.c 10 */ #ifdef SRC_SPECIALS } #endif /* END CHUNK events.c 10 */ XFlush(DISP); busycurs = False; } if (!wait && (canit | alt_canit)) { #if PS psp.interrupt(); #endif if (allow_can) { (void) sigprocmask(SIG_SETMASK, &oldsig, (sigset_t *)NULL); longjmp(canit_env, 1); } } if (!wait || canit || mane.min_x < MAXDIM || alt.min_x < MAXDIM || mag_moved) { (void) sigprocmask(SIG_SETMASK, &oldsig, (sigset_t *) NULL); return; } (void) sigsuspend(&oldsig); if (terminate_flag) { #if PS ps_destroy(); #endif exit(0); } } (void) sigprocmask(SIG_SETMASK, &oldsig, (sigset_t *) NULL); } } else #endif /* not FLAKY_SIGPOLL */ { for (;;) { #if HAVE_POLL int retval; #endif if (terminate_flag) { #if PS ps_destroy(); #endif exit(0); } if (XtPending()) break; /* * The following code eliminates unnecessary calls to * XDefineCursor, since this is a slow operation on some * hardware (e.g., S3 chips). */ if (busycurs && wait && !canit && !mag_moved && alt.min_x == MAXDIM && mane.min_x == MAXDIM) { XSync(DISP, False); if (XtPending()) break; /* BEGIN CHUNK events.c 11 */ #ifdef SRC_SPECIALS if (src_evalMode) { XDefineCursor(DISP, mane.win, src_cursor); } else { #endif /* END CHUNK events.c 11 */ XDefineCursor(DISP, mane.win, ready_cursor); /* BEGIN CHUNK events.c 12 */ #ifdef SRC_SPECIALS } #endif /* END CHUNK events.c 12 */ XFlush(DISP); busycurs = False; } if (!wait && (canit | alt_canit)) { #if PS psp.interrupt(); #endif if (allow_can) longjmp(canit_env, 1); } if (!wait || canit || mane.min_x < MAXDIM || alt.min_x < MAXDIM || mag_moved) return; /* If a SIGUSR1 signal comes right now, then it will wait until an X event or another SIGUSR1 signal arrives. */ #if HAVE_POLL do { retval = poll(fds, XtNumber(fds), -1); } while (retval < 0 && errno == EAGAIN); if (retval < 0 && errno != EINTR) perror("poll (xdvi read_events)"); #else FD_SET(ConnectionNumber(DISP), &readfds); if (select(ConnectionNumber(DISP) + 1, &readfds, (fd_set *) NULL, (fd_set *) NULL, (struct timeval *) NULL) < 0 && errno != EINTR) perror("select (xdvi read_events)"); #endif } } #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 /* not 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)) { 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 /* not 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); if (!busycurs) { XDefineCursor(DISP, mane.win, redraw_cursor); XFlush(DISP); busycurs = True; } if (setjmp(dvi_env)) { XClearWindow(DISP, mane.win); showmessage(dvi_oops_msg); if (dvi_file) { Fclose(dvi_file); dvi_file = NULL; } } else { draw_page(); // fixme: kpse_pathname is sometimes corrupt when calling this function from here: // src_warn_outdated(); warn_spec_now = False; } } 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; } #ifndef FLAKY_SIGPOLL /* ARGSUSED */ static RETSIGTYPE handle_sigpoll(signo) int signo; { event_counter = 1; event_freq = -1; /* forget Plan B */ #if !HAVE_SIGACTION (void) signal(SIGPOLL, handle_sigpoll); /* reset the signal */ #endif } #endif /* not FLAKY_SIGPOLL */ /* ARGSUSED */ static RETSIGTYPE handle_sigusr(signo) int signo; { event_counter = 1; canit = True; dvi_time = 0; #if ! HAVE_SIGACTION (void) signal(SIGUSR1, handle_sigusr); /* reset the signal */ #endif } /* ARGSUSED */ static RETSIGTYPE handle_sigterm(signo) int signo; { terminate_flag = True; } static void enable_intr() { #ifndef FLAKY_SIGPOLL int sock_fd = ConnectionNumber(DISP); #endif #if HAVE_SIGACTION struct sigaction a; #endif #ifndef FLAKY_SIGPOLL #if HAVE_SIGACTION /* Subprocess handling, e.g., mktexpk, fails on the Alpha without this, because SIGPOLL 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. */ a.sa_handler = handle_sigpoll; (void) sigemptyset(&a.sa_mask); (void) sigaddset(&a.sa_mask, SIGPOLL); a.sa_flags = SA_RESTART; sigaction(SIGPOLL, &a, NULL); #else /* not HAVE_SIGACTION */ (void) signal(SIGPOLL, handle_sigpoll); #endif /* not HAVE_SIGACTION */ #if HAVE_STREAMS if (isastream(sock_fd) > 0) { if (ioctl(sock_fd, I_SETSIG, S_RDNORM | S_RDBAND | S_HANGUP | S_WRNORM) == -1) perror("ioctl I_SETSIG (xdvi)"); } else #endif { #ifdef FASYNC if (fcntl(sock_fd, F_SETOWN, getpid()) == -1) perror("fcntl F_SETOWN (xdvi)"); if (fcntl(sock_fd, F_SETFL, fcntl(sock_fd, F_GETFL, 0) | FASYNC) == -1) perror("fcntl F_SETFL (xdvi)"); #elif defined(SIOCSPGRP) && defined(FIOASYNC) /* For HP-UX B.10.10 and maybe others. See "man 7 socket". */ int arg; arg = getpid(); if (ioctl(sock_fd, SIOCSPGRP, &arg) == -1) perror("ioctl SIOCSPGRP (xdvi)"); arg = 1; if (ioctl(sock_fd, FIOASYNC, &arg) == -1) perror("ioctl FIOASYNC (xdvi)"); #endif } #endif /* not FLAKY_SIGPOLL */ #if HAVE_SIGACTION a.sa_handler = handle_sigusr; (void) sigemptyset(&a.sa_mask); (void) sigaddset(&a.sa_mask, SIGUSR1); a.sa_flags = 0; sigaction(SIGUSR1, &a, NULL); #else /* not HAVE_SIGACTION */ (void) signal(SIGUSR1, handle_sigusr); #endif /* not HAVE_SIGACTION */ #if HAVE_SIGACTION a.sa_handler = handle_sigterm; (void) sigemptyset(&a.sa_mask); (void) sigaddset(&a.sa_mask, SIGINT); (void) sigaddset(&a.sa_mask, SIGQUIT); (void) sigaddset(&a.sa_mask, SIGTERM); a.sa_flags = 0; sigaction(SIGINT, &a, NULL); sigaction(SIGQUIT, &a, NULL); sigaction(SIGTERM, &a, NULL); #else /* not HAVE_SIGACTION */ (void) signal(SIGINT, handle_sigterm); (void) signal(SIGQUIT, handle_sigterm); (void) signal(SIGTERM, handle_sigterm); #endif /* not HAVE_SIGACTION */ #ifndef FLAKY_SIGPOLL (void) sigemptyset(&sigpollusrterm); (void) sigaddset(&sigpollusrterm, SIGPOLL); (void) sigaddset(&sigpollusrterm, SIGUSR1); (void) sigaddset(&sigpollusrterm, SIGINT); (void) sigaddset(&sigpollusrterm, SIGQUIT); (void) sigaddset(&sigpollusrterm, SIGTERM); #endif #if HAVE_POLL fds[0].fd = ConnectionNumber(DISP); #else FD_ZERO(&readfds); #endif } void do_pages() { enable_intr(); 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 */ #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 (;;) { 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); } } }