source: viewwin.c @ 69873f7

release-1.10release-1.7release-1.8release-1.9
Last change on this file since 69873f7 was 69873f7, checked in by David Benjamin <davidben@mit.edu>, 14 years ago
The viewwin should take references to its window
  • Property mode set to 100644
File size: 4.6 KB
RevLine 
[7d4fbcd]1#include <string.h>
2#include "owl.h"
3
4#define BOTTOM_OFFSET 1
5
[b2b0773]6/* initialize the viewwin e.  'win' is an already initialzed curses
7 * window that will be used by viewwin
8 */
[68f63a2]9void owl_viewwin_init_text(owl_viewwin *v, owl_window *win, const char *text)
[b2b0773]10{
[7d4fbcd]11  owl_fmtext_init_null(&(v->fmtext));
12  if (text) {
13    owl_fmtext_append_normal(&(v->fmtext), text);
[4083c49]14    if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
[7d4fbcd]15      owl_fmtext_append_normal(&(v->fmtext), "\n");
16    }
17    v->textlines=owl_fmtext_num_lines(&(v->fmtext));
18  }
19  v->topline=0;
20  v->rightshift=0;
[afbf668]21  v->onclose_hook = NULL;
[68f63a2]22
23  owl_viewwin_set_window(v, win);
[afbf668]24}
25
[e19eb97]26void owl_viewwin_append_text(owl_viewwin *v, const char *text) {
[afbf668]27    owl_fmtext_append_normal(&(v->fmtext), text);
28    v->textlines=owl_fmtext_num_lines(&(v->fmtext)); 
[68f63a2]29    owl_window_dirty(v->window);
[7d4fbcd]30}
31
[b2b0773]32/* initialize the viewwin e.  'win' is an already initialzed curses
33 * window that will be used by viewwin
34 */
[68f63a2]35void owl_viewwin_init_fmtext(owl_viewwin *v, owl_window *win, const owl_fmtext *fmtext)
[b2b0773]36{
[dd6af02]37  char *text;
38
[7d4fbcd]39  owl_fmtext_copy(&(v->fmtext), fmtext);
[dd6af02]40  text = owl_fmtext_print_plain(fmtext);
41  if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
42      owl_fmtext_append_normal(&(v->fmtext), "\n");
43  }
[3e55268]44  owl_free(text);
[7d4fbcd]45  v->textlines=owl_fmtext_num_lines(&(v->fmtext));
46  v->topline=0;
47  v->rightshift=0;
[68f63a2]48
49  owl_viewwin_set_window(v, win);
[7d4fbcd]50}
51
[68f63a2]52void owl_viewwin_set_window(owl_viewwin *v, owl_window *w)
[b2b0773]53{
[68f63a2]54  if (v->window) {
[7a6e6c7]55    g_signal_handler_disconnect(v->window, v->sig_redraw_id);
[69873f7]56    g_object_unref(v->window);
[68f63a2]57  }
58  v->window = w;
59  if (w) {
[69873f7]60    g_object_ref(v->window);
[7a6e6c7]61    v->sig_redraw_id = g_signal_connect(w, "redraw", G_CALLBACK(owl_viewwin_redisplay), v);
[68f63a2]62  }
[7d4fbcd]63}
64
[afbf668]65void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) {
66  v->onclose_hook = onclose_hook;
67  v->onclose_hook_data = onclose_hook_data;
68}
69
[b2b0773]70/* regenerate text on the curses window. */
[68f63a2]71void owl_viewwin_redisplay(owl_window *w, WINDOW *curswin, void *user_data)
[b2b0773]72{
[7d4fbcd]73  owl_fmtext fm1, fm2;
[68f63a2]74  owl_viewwin *v = user_data;
[c447d9c]75  int winlines, wincols;
76
77  owl_window_get_position(w, &winlines, &wincols, 0, 0);
[7d4fbcd]78 
[68f63a2]79  werase(curswin);
80  wmove(curswin, 0, 0);
[7d4fbcd]81
[af2ca19]82  owl_fmtext_init_null(&fm1);
83  owl_fmtext_init_null(&fm2);
84 
[c447d9c]85  owl_fmtext_truncate_lines(&(v->fmtext), v->topline, winlines-BOTTOM_OFFSET, &fm1);
86  owl_fmtext_truncate_cols(&fm1, v->rightshift, wincols-1+v->rightshift, &fm2);
[7d4fbcd]87
[68f63a2]88  owl_fmtext_curs_waddstr_without_search(&fm2, curswin);
[7d4fbcd]89
90  /* print the message at the bottom */
[c447d9c]91  wmove(curswin, winlines-1, 0);
[68f63a2]92  wattrset(curswin, A_REVERSE);
[c447d9c]93  if (v->textlines - v->topline > winlines-BOTTOM_OFFSET) {
[68f63a2]94    waddstr(curswin, "--More-- (Space to see more, 'q' to quit)");
[7d4fbcd]95  } else {
[68f63a2]96    waddstr(curswin, "--End-- (Press 'q' to quit)");
[7d4fbcd]97  }
[68f63a2]98  wattroff(curswin, A_REVERSE);
[7d4fbcd]99
[7ab0020]100  owl_fmtext_cleanup(&fm1);
101  owl_fmtext_cleanup(&fm2);
[7d4fbcd]102}
103
[b2b0773]104void owl_viewwin_pagedown(owl_viewwin *v)
105{
[c447d9c]106  int winlines;
107  owl_window_get_position(v->window, &winlines, 0, 0, 0);
108  v->topline+=winlines - BOTTOM_OFFSET;
109  if ( (v->topline+winlines-BOTTOM_OFFSET) > v->textlines) {
110    v->topline = v->textlines - winlines + BOTTOM_OFFSET;
[7d4fbcd]111  }
[68f63a2]112  owl_window_dirty(v->window);
[7d4fbcd]113}
114
[b2b0773]115void owl_viewwin_linedown(owl_viewwin *v)
116{
[c447d9c]117  int winlines;
118  owl_window_get_position(v->window, &winlines, 0, 0, 0);
[7d4fbcd]119  v->topline++;
[c447d9c]120  if ( (v->topline+winlines-BOTTOM_OFFSET) > v->textlines) {
121    v->topline = v->textlines - winlines + BOTTOM_OFFSET;
[7d4fbcd]122  }
[68f63a2]123  owl_window_dirty(v->window);
[7d4fbcd]124}
125
[b2b0773]126void owl_viewwin_pageup(owl_viewwin *v)
127{
[c447d9c]128  int winlines;
129  owl_window_get_position(v->window, &winlines, 0, 0, 0);
130  v->topline-=winlines;
[7d4fbcd]131  if (v->topline<0) v->topline=0;
[68f63a2]132  owl_window_dirty(v->window);
[7d4fbcd]133}
134
[b2b0773]135void owl_viewwin_lineup(owl_viewwin *v)
136{
[7d4fbcd]137  v->topline--;
138  if (v->topline<0) v->topline=0;
[68f63a2]139  owl_window_dirty(v->window);
[7d4fbcd]140}
141
[b2b0773]142void owl_viewwin_right(owl_viewwin *v, int n)
143{
[7d4fbcd]144  v->rightshift+=n;
[68f63a2]145  owl_window_dirty(v->window);
[7d4fbcd]146}
147
[b2b0773]148void owl_viewwin_left(owl_viewwin *v, int n)
149{
[7d4fbcd]150  v->rightshift-=n;
151  if (v->rightshift<0) v->rightshift=0;
[68f63a2]152  owl_window_dirty(v->window);
[7d4fbcd]153}
154
[b2b0773]155void owl_viewwin_top(owl_viewwin *v)
156{
[7d4fbcd]157  v->topline=0;
158  v->rightshift=0;
[68f63a2]159  owl_window_dirty(v->window);
[7d4fbcd]160}
161
[b2b0773]162void owl_viewwin_bottom(owl_viewwin *v)
163{
[c447d9c]164  int winlines;
165  owl_window_get_position(v->window, &winlines, 0, 0, 0);
166  v->topline = v->textlines - winlines + BOTTOM_OFFSET;
[68f63a2]167  owl_window_dirty(v->window);
[7d4fbcd]168}
169
[963b471]170void owl_viewwin_cleanup(owl_viewwin *v)
[b2b0773]171{
[5f7eadf]172  owl_viewwin_set_window(v, NULL);
[afbf668]173  if (v->onclose_hook) {
174    v->onclose_hook(v, v->onclose_hook_data);
[8721756]175    v->onclose_hook = NULL;
176    v->onclose_hook_data = NULL;
[afbf668]177  }
[7ab0020]178  owl_fmtext_cleanup(&(v->fmtext));
[7d4fbcd]179}
Note: See TracBrowser for help on using the repository browser.