source: viewwin.c @ 1383b58

release-1.7release-1.8release-1.9
Last change on this file since 1383b58 was 68f63a2, checked in by David Benjamin <davidben@mit.edu>, 11 years ago
Port owl_viewwin to owl_window A number of hacks. This is just a test run of the API.
  • Property mode set to 100644
File size: 4.4 KB
Line 
1#include <string.h>
2#include "owl.h"
3
4#define BOTTOM_OFFSET 1
5
6/* initialize the viewwin e.  'win' is an already initialzed curses
7 * window that will be used by viewwin
8 */
9void owl_viewwin_init_text(owl_viewwin *v, owl_window *win, const char *text)
10{
11  owl_fmtext_init_null(&(v->fmtext));
12  if (text) {
13    owl_fmtext_append_normal(&(v->fmtext), text);
14    if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
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;
21  v->onclose_hook = NULL;
22
23  owl_viewwin_set_window(v, win);
24}
25
26void owl_viewwin_append_text(owl_viewwin *v, const char *text) {
27    owl_fmtext_append_normal(&(v->fmtext), text);
28    v->textlines=owl_fmtext_num_lines(&(v->fmtext)); 
29    owl_window_dirty(v->window);
30}
31
32/* initialize the viewwin e.  'win' is an already initialzed curses
33 * window that will be used by viewwin
34 */
35void owl_viewwin_init_fmtext(owl_viewwin *v, owl_window *win, const owl_fmtext *fmtext)
36{
37  char *text;
38
39  owl_fmtext_copy(&(v->fmtext), fmtext);
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  }
44  owl_free(text);
45  v->textlines=owl_fmtext_num_lines(&(v->fmtext));
46  v->topline=0;
47  v->rightshift=0;
48
49  owl_viewwin_set_window(v, win);
50}
51
52void owl_viewwin_set_window(owl_viewwin *v, owl_window *w)
53{
54  if (v->window) {
55    owl_window_set_redraw_cb(v->window, 0, 0, 0);
56    owl_window_set_resize_cb(v->window, 0, 0, 0);
57  }
58  v->window = w;
59  if (w) {
60    owl_window_get_position(w, &v->winlines, &v->wincols, 0, 0);
61    owl_window_set_redraw_cb(w, owl_viewwin_redisplay, v, 0);
62    owl_window_set_resize_cb(w, owl_viewwin_resize_hook, v, 0);
63  }
64}
65
66void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) {
67  v->onclose_hook = onclose_hook;
68  v->onclose_hook_data = onclose_hook_data;
69}
70
71void owl_viewwin_resize_hook(owl_window *w, void *user_data)
72{
73  owl_viewwin *v = user_data;
74  owl_window_get_position(w, &v->winlines, &v->wincols, 0, 0);
75}
76
77/* regenerate text on the curses window. */
78void owl_viewwin_redisplay(owl_window *w, WINDOW *curswin, void *user_data)
79{
80  owl_fmtext fm1, fm2;
81  owl_viewwin *v = user_data;
82 
83  werase(curswin);
84  wmove(curswin, 0, 0);
85
86  owl_fmtext_init_null(&fm1);
87  owl_fmtext_init_null(&fm2);
88 
89  owl_fmtext_truncate_lines(&(v->fmtext), v->topline, v->winlines-BOTTOM_OFFSET, &fm1);
90  owl_fmtext_truncate_cols(&fm1, v->rightshift, v->wincols-1+v->rightshift, &fm2);
91
92  owl_fmtext_curs_waddstr_without_search(&fm2, curswin);
93
94  /* print the message at the bottom */
95  wmove(curswin, v->winlines-1, 0);
96  wattrset(curswin, A_REVERSE);
97  if (v->textlines - v->topline > v->winlines-BOTTOM_OFFSET) {
98    waddstr(curswin, "--More-- (Space to see more, 'q' to quit)");
99  } else {
100    waddstr(curswin, "--End-- (Press 'q' to quit)");
101  }
102  wattroff(curswin, A_REVERSE);
103
104  owl_fmtext_cleanup(&fm1);
105  owl_fmtext_cleanup(&fm2);
106}
107
108void owl_viewwin_pagedown(owl_viewwin *v)
109{
110  v->topline+=v->winlines - BOTTOM_OFFSET;
111  if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) {
112    v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
113  }
114  owl_window_dirty(v->window);
115}
116
117void owl_viewwin_linedown(owl_viewwin *v)
118{
119  v->topline++;
120  if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) {
121    v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
122  }
123  owl_window_dirty(v->window);
124}
125
126void owl_viewwin_pageup(owl_viewwin *v)
127{
128  v->topline-=v->winlines;
129  if (v->topline<0) v->topline=0;
130  owl_window_dirty(v->window);
131}
132
133void owl_viewwin_lineup(owl_viewwin *v)
134{
135  v->topline--;
136  if (v->topline<0) v->topline=0;
137  owl_window_dirty(v->window);
138}
139
140void owl_viewwin_right(owl_viewwin *v, int n)
141{
142  v->rightshift+=n;
143  owl_window_dirty(v->window);
144}
145
146void owl_viewwin_left(owl_viewwin *v, int n)
147{
148  v->rightshift-=n;
149  if (v->rightshift<0) v->rightshift=0;
150  owl_window_dirty(v->window);
151}
152
153void owl_viewwin_top(owl_viewwin *v)
154{
155  v->topline=0;
156  v->rightshift=0;
157  owl_window_dirty(v->window);
158}
159
160void owl_viewwin_bottom(owl_viewwin *v)
161{
162  v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
163  owl_window_dirty(v->window);
164}
165
166void owl_viewwin_cleanup(owl_viewwin *v)
167{
168  if (v->onclose_hook) {
169    v->onclose_hook(v, v->onclose_hook_data);
170    v->onclose_hook = NULL;
171    v->onclose_hook_data = NULL;
172  }
173  owl_fmtext_cleanup(&(v->fmtext));
174}
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