+++ /dev/null
-/* Hypertext file browser.
- Copyright (C) 1994, 1995 Miguel de Icaza.
- Copyright (C) 1994, 1995 Janne Kukonlehto
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- Implements the hypertext file viewer.
- The hypertext file is a file that may have one or more nodes. Each
- node ends with a ^D character and starts with a bracket, then the
- name of the node and then a closing bracket.
-
- Links in the hypertext file are specified like this: the text that
- will be highlighted should have a leading ^A, then it comes the
- text, then a ^B indicating that highlighting is done, then the name
- of the node you want to link to and then a ^C.
-
- The file must contain a ^D at the beginning and at the end of the
- file or the program will not be able to detect the end of file.
-
- Lazyness/widgeting attack: This file does use the dialog manager
- and uses mainly the dialog to achieve the help work. there is only
- one specialized widget and it's only used to forward the mouse messages
- to the appropiate routine.
-
-*/
-
-#include <config.h>
-#include "tty.h"
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <malloc.h>
-#include <errno.h>
-#include <string.h>
-#include "mad.h"
-#include "color.h"
-#include "util.h"
-#include "dialog.h"
-#include "win.h"
-#include "global.h"
-#include "mouse.h"
-#include "key.h" /* For mi_getch() */
-#include "help.h"
-#include "layout.h" /* keybar_visible */
-#include "x.h"
-#include "dlg.h" /* For Dlg_head */
-#include "widget.h" /* For Widget */
-
-#ifdef HAVE_TK
-# include "tkmain.h"
-#endif
-
-#define MAXLINKNAME 80
-#define HISTORY_SIZE 20
-#define HELP_WINDOW_WIDTH 62
-
-/* "$Id$" */
-
-static char *data; /* Pointer to the loaded data file */
-static int help_lines = 18; /* Lines in help viewer */
-static int history_ptr; /* For the history queue */
-static char *main; /* The main node */
-static char *last_shown = 0; /* Last byte shown in a screen */
-static int end_of_node = 0; /* Flag: the last character of the node shown? */
-char *currentpoint, *startpoint;
-static char *selected_item;
-
-/* The widget variables */
-static Dlg_head *whelp;
-
-static struct {
- char *page; /* Pointer to the selected page */
- char *link; /* Pointer to the selected link */
-} history [HISTORY_SIZE];
-
-/* Link areas for the mouse */
-typedef struct Link_Area {
- int x1, y1, x2, y2;
- char *link_name;
- struct Link_Area *next;
-} Link_Area;
-
-static Link_Area *link_area = NULL;
-static int inside_link_area = 0;
-
-static int help_callback (struct Dlg_head *h, int id, int msg);
-
-#ifdef OS2_NT
-struct {
- int acscode;
- int pccode;
-} acs2pc_table [] = {
- { 'q', 0xC4 },
- { 'x', 0xB3 },
- { 'l', 0xDA },
- { 'k', 0xBF },
- { 'm', 0xC0 },
- { 'j', 0xD9 },
- { 'a', 0xB0 },
- { 'u', 0xB4 },
- { 't', 0xC3 },
- { 'w', 0xC2 },
- { 'v', 0xC1 },
- { 'n', 0xC5 },
- { 0, 0 } };
-
-static int acs2pc (int acscode)
-{
- int i;
-
- for (i = 0; acs2pc_table[i].acscode != 0; i++)
- if (acscode == acs2pc_table[i].acscode) {
- return acs2pc_table[i].pccode;
- }
- return 0;
-}
-#endif
-
-/* returns the position where text was found in the start buffer */
-/* or 0 if not found */
-char *search_string (char *start, char *text)
-{
- char *d = text;
- char *e = start;
-
- /* fmt sometimes replaces a space with a newline in the help file */
- /* Replace the newlines in the link name with spaces to correct the situation */
- while (*d){
- if (*d == '\n')
- *d = ' ';
- d++;
- }
- /* Do search */
- for (d = text; *e; e++){
- if (*d == *e)
- d++;
- else
- d = text;
- if (!*d)
- return e+1;
- }
- return 0;
-}
-
-/* Searches text in the buffer pointed by start. Search ends */
-/* if the CHAR_NODE_END is found in the text. Returns 0 on failure */
-static char *search_string_node (char *start, char *text)
-{
- char *d = text;
- char *e = start;
-
- if (!start)
- return 0;
-
- for (; *e && *e != CHAR_NODE_END; e++){
- if (*d == *e)
- d++;
- else
- d = text;
- if (!*d)
- return e+1;
- }
- return 0;
-}
-
-/* Searches the_char in the buffer pointer by start and searches */
-/* it can search forward (direction = 1) or backward (direction = -1) */
-static char *search_char_node (char *start, char the_char, int direction)
-{
- char *e;
-
- e = start;
-
- for (; *e && (*e != CHAR_NODE_END); e += direction){
- if (*e == the_char)
- return e;
- }
- return 0;
-}
-
-/* Returns the new current pointer when moved lines lines */
-static char *move_forward2 (char *c, int lines)
-{
- char *p;
- int line;
-
- currentpoint = c;
- for (line = 0, p = currentpoint; *p && *p != CHAR_NODE_END; p++){
- if (line == lines)
- return currentpoint = p;
- if (*p == '\n')
- line++;
- }
- return currentpoint = c;
-}
-
-static char *move_backward2 (char *c, int lines)
-{
- char *p;
- int line;
-
- currentpoint = c;
- for (line = 0, p = currentpoint; *p && p >= data; p--){
- if (*p == CHAR_NODE_END)
- {
- /* We reached the beginning of the node */
- /* Skip the node headers */
- while (*p != ']') p++;
- return currentpoint = p + 2;
- }
- if (*(p - 1) == '\n')
- line++;
- if (line == lines)
- return currentpoint = p;
- }
- return currentpoint = c;
-}
-
-static void move_forward (int i)
-{
- if (end_of_node)
- return;
- currentpoint = move_forward2 (currentpoint, i);
-}
-
-static void move_backward (int i)
-{
- currentpoint = move_backward2 (currentpoint, ++i);
-}
-
-static void move_to_top (int dummy)
-{
- while (currentpoint > data && *currentpoint != CHAR_NODE_END)
- currentpoint--;
- while (*currentpoint != ']')
- currentpoint++;
- currentpoint = currentpoint + 1;
- selected_item = NULL;
-}
-
-static void move_to_bottom (int dummy)
-{
- while (*currentpoint && *currentpoint != CHAR_NODE_END)
- currentpoint++;
- currentpoint--;
- move_backward (help_lines - 1);
-}
-
-char *help_follow_link (char *start, char *selected_item)
-{
- char link_name [MAXLINKNAME];
- char *p;
- int i = 0;
-
- if (!selected_item)
- return start;
-
- for (p = selected_item; *p && *p != CHAR_NODE_END && *p != CHAR_LINK_POINTER; p++)
- ;
- if (*p == CHAR_LINK_POINTER){
- link_name [0] = '[';
- for (i = 1; *p != CHAR_LINK_END && *p && *p != CHAR_NODE_END && i < MAXLINKNAME-3; )
- link_name [i++] = *++p;
- link_name [i-1] = ']';
- link_name [i] = 0;
- p = search_string (data, link_name);
- if (p)
- return p;
- }
- return _(" Help file format error\n\x4"); /* */
-}
-
-static char *select_next_link (char *start, char *current_link)
-{
- char *p;
-
- if (!current_link)
- return 0;
-
- p = search_string_node (current_link, STRING_LINK_END);
- if (!p)
- return NULL;
- p = search_string_node (p, STRING_LINK_START);
- if (!p)
- return NULL;
- return p - 1;
-}
-
-static char *select_prev_link (char *start, char *current_link)
-{
- char *p;
-
- if (!current_link)
- return 0;
-
- p = current_link - 1;
- if (p <= start)
- return 0;
-
- p = search_char_node (p, CHAR_LINK_START, -1);
- return p;
-}
-
-static void start_link_area (int x, int y, char *link_name)
-{
- Link_Area *new;
-
- if (inside_link_area)
- message (0, _(" Warning "), _(" Internal bug: Double start of link area "));
-
- /* Allocate memory for a new link area */
- new = (Link_Area*) xmalloc (sizeof (Link_Area), "Help, link_area");
- new->next = link_area;
- link_area = new;
-
- /* Save the beginning coordinates of the link area */
- link_area->x1 = x;
- link_area->y1 = y;
-
- /* Save the name of the destination anchor */
- link_area->link_name = link_name;
-
- inside_link_area = 1;
-}
-
-static void end_link_area (int x, int y)
-{
- if (inside_link_area){
- /* Save the end coordinates of the link area */
- link_area->x2 = x;
- link_area->y2 = y;
-
- inside_link_area = 0;
- }
-}
-
-static void clear_link_areas (void)
-{
- Link_Area *current;
-
- while (link_area){
- current = link_area;
- link_area = current -> next;
- free (current);
- }
- inside_link_area = 0;
-}
-
-static void show (Dlg_head *h, char *paint_start)
-{
- char *p;
- int col, line, c;
- int painting = 1;
- int acs; /* Flag: Alternate character set active? */
- int repeat_paint;
- int active_col, active_line;/* Active link position */
-
- do {
-
- line = col = acs = active_col = active_line = repeat_paint = 0;
-
- clear_link_areas ();
- if (selected_item < paint_start)
- selected_item = NULL;
-
- for (p = paint_start; *p != CHAR_NODE_END && line < help_lines; p++){
- c = *p;
- switch (c){
- case CHAR_LINK_START:
- if (selected_item == NULL)
- selected_item = p;
- if (p == selected_item){
- attrset (HELP_SLINK_COLOR);
-
- /* Store the coordinates of the link */
- active_col = col + 2;
- active_line = line + 2;
- }
- else
- attrset (HELP_LINK_COLOR);
- start_link_area (col, line, p);
- break;
- case CHAR_LINK_POINTER:
- painting = 0;
- end_link_area (col - 1, line);
- break;
- case CHAR_LINK_END:
- painting = 1;
- attrset (HELP_NORMAL_COLOR);
- break;
- case CHAR_ALTERNATE:
- acs = 1;
- break;
- case CHAR_NORMAL:
- acs = 0;
- break;
- case CHAR_VERSION:
- dlg_move (h, line+2, col+2);
- addstr (VERSION);
- col += strlen (VERSION);
- break;
- case CHAR_BOLD_ON:
- attrset (HELP_BOLD_COLOR);
- break;
- case CHAR_ITALIC_ON:
- attrset (HELP_ITALIC_COLOR);
- break;
- case CHAR_BOLD_OFF:
- attrset (HELP_NORMAL_COLOR);
- break;
- case '\n':
- line++;
- col = 0;
- break;
- case '\t':
- col = (col/8 + 1) * 8;
- break;
- case CHAR_MCLOGO:
- case CHAR_TEXTONLY_START:
- case CHAR_TEXTONLY_END:
- break;
- case CHAR_XONLY_START:
- while (*p && *p != CHAR_NODE_END && *p != CHAR_XONLY_END)
- p++;
- if (*p == CHAR_NODE_END || !*p)
- p--;
- break;
- default:
- if (!painting)
- continue;
- if (col > HELP_WINDOW_WIDTH-1)
- continue;
-
- dlg_move (h, line+2, col+2);
- if (acs){
- if (c == ' ' || c == '.')
- addch (c);
- else
-#ifndef OS2_NT
-#ifndef HAVE_SLANG
- addch (acs_map [c]);
-#else
- SLsmg_draw_object (h->y + line + 2, h->x + col + 2, c);
-#endif
-#else
- addch (acs2pc (c));
-#endif /* OS2_NT */
- } else
- addch (c);
- col++;
- break;
- }
- }
- last_shown = p;
- end_of_node = line < help_lines;
- attrset (HELP_NORMAL_COLOR);
- if (selected_item >= last_shown){
- if (link_area != NULL){
- selected_item = link_area->link_name;
- repeat_paint = 1;
- }
- else
- selected_item = NULL;
- }
- } while (repeat_paint);
-
- /* Position the cursor over a nice link */
- if (active_col)
- dlg_move (h, active_line, active_col);
-}
-
-static int help_event (Gpm_Event *event, Widget *w)
-{
- Link_Area *current_area;
-
- if (! (event->type & GPM_UP))
- return 0;
-
- /* The event is relative to the dialog window, adjust it: */
- event->y -= 2;
-
- if (event->buttons & GPM_B_RIGHT){
- currentpoint = startpoint = history [history_ptr].page;
- selected_item = history [history_ptr].link;
- history_ptr--;
- if (history_ptr < 0)
- history_ptr = HISTORY_SIZE-1;
-
- help_callback (w->parent, 0, DLG_DRAW);
- return 0;
- }
-
- /* Test whether the mouse click is inside one of the link areas */
- current_area = link_area;
- while (current_area)
- {
- /* Test one line link area */
- if (event->y == current_area->y1 && event->x >= current_area->x1 &&
- event->y == current_area->y2 && event->x <= current_area->x2)
- break;
- /* Test two line link area */
- if (current_area->y1 + 1 == current_area->y2){
- /* The first line */
- if (event->y == current_area->y1 && event->x >= current_area->x1)
- break;
- /* The second line */
- if (event->y == current_area->y2 && event->x <= current_area->x2)
- break;
- }
- /* Mouse will not work with link areas of more than two lines */
-
- current_area = current_area -> next;
- }
-
- /* Test whether a link area was found */
- if (current_area){
- /* The click was inside a link area -> follow the link */
- history_ptr = (history_ptr+1) % HISTORY_SIZE;
- history [history_ptr].page = currentpoint;
- history [history_ptr].link = current_area->link_name;
- currentpoint = startpoint = help_follow_link (currentpoint, current_area->link_name);
- selected_item = NULL;
- } else{
- if (event->y < 0)
- move_backward (help_lines - 1);
- else if (event->y >= help_lines)
- move_forward (help_lines - 1);
- else if (event->y < help_lines/2)
- move_backward (1);
- else
- move_forward (1);
- }
-
- /* Show the new node */
- help_callback (w->parent, 0, DLG_DRAW);
-
- return 0;
-}
-
-/* show help */
-void help_help_cmd (Dlg_head *h)
-{
- history_ptr = (history_ptr+1) % HISTORY_SIZE;
- history [history_ptr].page = currentpoint;
- history [history_ptr].link = selected_item;
- currentpoint = startpoint = search_string (data, "[How to use help]") + 1;
- selected_item = NULL;
-#ifndef HAVE_XVIEW
- help_callback (h, 0, DLG_DRAW);
-#endif
-}
-
-void help_index_cmd (Dlg_head *h)
-{
- char *new_item;
-
- history_ptr = (history_ptr+1) % HISTORY_SIZE;
- history [history_ptr].page = currentpoint;
- history [history_ptr].link = selected_item;
- currentpoint = startpoint = search_string (data, "[Help]") + 1;
-
- if (!(new_item = search_string (data, "[Contents]")))
- message (1, MSG_ERROR, _(" Can't find node [Contents] in help file "));
- else
- currentpoint = startpoint = new_item + 1;
- selected_item = NULL;
-#ifndef HAVE_XVIEW
- help_callback (h, 0, DLG_DRAW);
-#endif
-}
-
-static void quit_cmd (void *x)
-{
- Dlg_head *h = (Dlg_head *) x;
-
- dlg_stop (x);
-}
-
-static void prev_node_cmd (Dlg_head *h)
-{
- currentpoint = startpoint = history [history_ptr].page;
- selected_item = history [history_ptr].link;
- history_ptr--;
- if (history_ptr < 0)
- history_ptr = HISTORY_SIZE-1;
-
-#ifndef HAVE_XVIEW
- help_callback (h, 0, DLG_DRAW);
-#endif
-}
-
-static int md_callback (Dlg_head *h, Widget *w, int msg, int par)
-{
- return default_proc (h, msg, par);
-}
-
-static Widget *mousedispatch_new (int y, int x, int yl, int xl)
-{
- Widget *w = xmalloc (sizeof (Widget), "disp_new");
-
- init_widget (w, y, x, yl, xl,
- (callback_fn) md_callback, 0, (mouse_h) help_event, NULL);
-
- return w;
-}
-
-static int help_handle_key (struct Dlg_head *h, int c)
-{
- char *new_item;
-
- if (c != KEY_UP && c != KEY_DOWN &&
- check_movement_keys (c, 1, help_lines, currentpoint,
- (movefn) move_backward2,
- (movefn) move_forward2,
- (movefn) move_to_top,
- (movefn) move_to_bottom))
- /* Nothing */;
- else switch (c){
- case 'l':
- case KEY_LEFT:
- prev_node_cmd (h);
- break;
-
- case '\n':
- case KEY_RIGHT:
- /* follow link */
- if (!selected_item){
-#ifdef WE_WANT_TO_GO_BACKWARD_ON_KEY_RIGHT
- /* Is there any reason why the right key would take us
- * backward if there are no links selected?, I agree
- * with Torben than doing nothing in this case is better
- */
- /* If there are no links, go backward in history */
- history_ptr--;
- if (history_ptr < 0)
- history_ptr = HISTORY_SIZE-1;
-
- currentpoint = startpoint = history [history_ptr].page;
- selected_item = history [history_ptr].link;
-#endif
- } else {
- history_ptr = (history_ptr+1) % HISTORY_SIZE;
- history [history_ptr].page = currentpoint;
- history [history_ptr].link = selected_item;
- currentpoint = startpoint = help_follow_link (currentpoint, selected_item) + 1;
- }
- selected_item = NULL;
- break;
-
- case KEY_DOWN:
- case '\t':
- /* select next link */
- new_item = select_next_link (startpoint, selected_item);
- if (new_item){
- selected_item = new_item;
- if (selected_item >= last_shown){
- if (c == KEY_DOWN)
- move_forward (1);
- else
- selected_item = NULL;
- }
- } else if (c == KEY_DOWN)
- move_forward (1);
- else
- selected_item = NULL;
- break;
-
- case KEY_UP:
- case ALT ('\t'):
- /* select previous link */
- new_item = select_prev_link (startpoint, selected_item);
- selected_item = new_item;
- if (selected_item < currentpoint || selected_item >= last_shown){
- if (c == KEY_UP)
- move_backward (1);
- else{
- if (link_area != NULL)
- selected_item = link_area->link_name;
- else
- selected_item = NULL;
- }
- }
- break;
-
- case 'n':
- /* Next node */
- new_item = currentpoint;
- while (*new_item && *new_item != CHAR_NODE_END)
- new_item++;
- if (*++new_item == '['){
- while (*new_item != ']')
- new_item++;
- currentpoint = new_item + 2;
- selected_item = NULL;
- }
- break;
-
- case 'p':
- /* Previous node */
- new_item = currentpoint;
- while (new_item > data + 1 && *new_item != CHAR_NODE_END)
- new_item--;
- new_item--;
- while (new_item > data && *new_item != CHAR_NODE_END)
- new_item--;
- while (*new_item != ']')
- new_item++;
- currentpoint = new_item + 2;
- selected_item = NULL;
- break;
-
- case 'c':
- help_index_cmd (h);
- break;
-
- case ESC_CHAR:
- case XCTRL('g'):
- dlg_stop (h);
- break;
-
- default:
- return 0;
-
- }
- help_callback (h, 0, DLG_DRAW);
- return 1;
-}
-
-static int help_callback (struct Dlg_head *h, int id, int msg)
-{
- switch (msg){
- case DLG_DRAW:
- attrset (HELP_NORMAL_COLOR);
- dlg_erase (h);
- draw_box (h, 1, 1, help_lines+2, HELP_WINDOW_WIDTH+2);
- attrset (COLOR_HOT_NORMAL);
- dlg_move (h, 1, (HELP_WINDOW_WIDTH - 1) / 2);
- addstr (_(" Help "));
- attrset (HELP_NORMAL_COLOR);
- show (h, currentpoint);
- break;
-
- case DLG_KEY:
- return help_handle_key (h, id);
- }
- return 0;
-}
-
-void interactive_display_finish (void)
-{
- clear_link_areas ();
- free (data);
-}
-
-void interactive_display (char *filename, char *node)
-{
- WButtonBar *help_bar;
- Widget *md;
-
- if ((data = load_file (filename)) == 0){
- message (1, MSG_ERROR, _(" Can't open file %s \n %s "),
- filename, unix_error_string (errno));
- return;
- }
- if (!(main = search_string (data, node))){
- message (1, MSG_ERROR, _(" Can't find node %s in help file "), node);
- interactive_display_finish ();
- return;
- }
-
-#ifndef HAVE_X
- if (help_lines > LINES - 4)
- help_lines = LINES - 4;
-
- whelp = create_dlg (0, 0, help_lines+4, HELP_WINDOW_WIDTH+4, dialog_colors,
- help_callback, "[Help]", "help", DLG_TRYUP|DLG_CENTER);
-
- /* allow us to process the tab key */
- whelp->raw = 1;
-
-#endif
- selected_item = search_string_node (main, STRING_LINK_START) - 1;
- currentpoint = startpoint = main + 1;
-
- for (history_ptr = HISTORY_SIZE; history_ptr;){
- history_ptr--;
- history [history_ptr].page = currentpoint;
- history [history_ptr].link = selected_item;
- }
-
-#ifndef HAVE_X
- help_bar = buttonbar_new (keybar_visible);
- help_bar->widget.y -= whelp->y;
- help_bar->widget.x -= whelp->x;
-
- md = mousedispatch_new (1, 1, help_lines, HELP_WINDOW_WIDTH-2);
-
- add_widget (whelp, help_bar);
- add_widget (whelp, md);
-
- define_label_data (whelp, (Widget *)NULL, 1, _("Help"),
- (buttonbarfn) help_help_cmd, whelp);
- define_label_data (whelp, (Widget *)NULL, 2, _("Index"),
- (buttonbarfn) help_index_cmd,whelp);
- define_label_data (whelp, (Widget *)NULL, 3, _("Prev"),
- (buttonbarfn) prev_node_cmd, whelp);
- define_label (whelp, (Widget *) NULL, 4, "", 0);
- define_label (whelp, (Widget *) NULL, 5, "", 0);
- define_label (whelp, (Widget *) NULL, 6, "", 0);
- define_label (whelp, (Widget *) NULL, 7, "", 0);
- define_label (whelp, (Widget *) NULL, 8, "", 0);
- define_label (whelp, (Widget *) NULL, 9, "", 0);
- define_label_data (whelp, (Widget *) NULL, 10, _("Quit"), quit_cmd, whelp);
-
- run_dlg (whelp);
- interactive_display_finish ();
- destroy_dlg (whelp);
-#else
- x_interactive_display ();
-#endif
-}
-
projects / reactos.git / blobdiff