source: viewwin.c @ d6f2d21

release-1.7release-1.8release-1.9
Last change on this file since d6f2d21 was 0b9e607, checked in by David Benjamin <davidben@mit.edu>, 11 years ago
Rename redisplays to redraw Gives a target to grep for and matches the signal name.
  • Property mode set to 100644
File size: 4.6 KB
Line 
1#include <string.h>
2#include "owl.h"
3
4#define BOTTOM_OFFSET 1
5
6static void owl_viewwin_redraw(owl_window *w, WINDOW *curswin, void *user_data);
7
8/* initialize the viewwin e.  'win' is an already initialzed curses
9 * window that will be used by viewwin
10 */
11void owl_viewwin_init_text(owl_viewwin *v, owl_window *win, const char *text)
12{
13  owl_fmtext_init_null(&(v->fmtext));
14  if (text) {
15    owl_fmtext_append_normal(&(v->fmtext), text);
16    if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
17      owl_fmtext_append_normal(&(v->fmtext), "\n");
18    }
19    v->textlines=owl_fmtext_num_lines(&(v->fmtext));
20  }
21  v->topline=0;
22  v->rightshift=0;
23  v->onclose_hook = NULL;
24
25  owl_viewwin_set_window(v, win);
26}
27
28void owl_viewwin_append_text(owl_viewwin *v, const char *text) {
29    owl_fmtext_append_normal(&(v->fmtext), text);
30    v->textlines=owl_fmtext_num_lines(&(v->fmtext)); 
31    owl_window_dirty(v->window);
32}
33
34/* initialize the viewwin e.  'win' is an already initialzed curses
35 * window that will be used by viewwin
36 */
37void owl_viewwin_init_fmtext(owl_viewwin *v, owl_window *win, const owl_fmtext *fmtext)
38{
39  char *text;
40
41  owl_fmtext_copy(&(v->fmtext), fmtext);
42  text = owl_fmtext_print_plain(fmtext);
43  if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
44      owl_fmtext_append_normal(&(v->fmtext), "\n");
45  }
46  owl_free(text);
47  v->textlines=owl_fmtext_num_lines(&(v->fmtext));
48  v->topline=0;
49  v->rightshift=0;
50
51  owl_viewwin_set_window(v, win);
52}
53
54void owl_viewwin_set_window(owl_viewwin *v, owl_window *w)
55{
56  if (v->window) {
57    g_signal_handler_disconnect(v->window, v->sig_redraw_id);
58    g_object_unref(v->window);
59  }
60  v->window = w;
61  if (w) {
62    g_object_ref(v->window);
63    v->sig_redraw_id = g_signal_connect(w, "redraw", G_CALLBACK(owl_viewwin_redraw), v);
64  }
65}
66
67void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) {
68  v->onclose_hook = onclose_hook;
69  v->onclose_hook_data = onclose_hook_data;
70}
71
72/* regenerate text on the curses window. */
73static void owl_viewwin_redraw(owl_window *w, WINDOW *curswin, void *user_data)
74{
75  owl_fmtext fm1, fm2;
76  owl_viewwin *v = user_data;
77  int winlines, wincols;
78
79  owl_window_get_position(w, &winlines, &wincols, 0, 0);
80 
81  werase(curswin);
82  wmove(curswin, 0, 0);
83
84  owl_fmtext_init_null(&fm1);
85  owl_fmtext_init_null(&fm2);
86 
87  owl_fmtext_truncate_lines(&(v->fmtext), v->topline, winlines-BOTTOM_OFFSET, &fm1);
88  owl_fmtext_truncate_cols(&fm1, v->rightshift, wincols-1+v->rightshift, &fm2);
89
90  owl_fmtext_curs_waddstr_without_search(&fm2, curswin);
91
92  /* print the message at the bottom */
93  wmove(curswin, winlines-1, 0);
94  wattrset(curswin, A_REVERSE);
95  if (v->textlines - v->topline > winlines-BOTTOM_OFFSET) {
96    waddstr(curswin, "--More-- (Space to see more, 'q' to quit)");
97  } else {
98    waddstr(curswin, "--End-- (Press 'q' to quit)");
99  }
100  wattroff(curswin, A_REVERSE);
101
102  owl_fmtext_cleanup(&fm1);
103  owl_fmtext_cleanup(&fm2);
104}
105
106void owl_viewwin_pagedown(owl_viewwin *v)
107{
108  int winlines;
109  owl_window_get_position(v->window, &winlines, 0, 0, 0);
110  v->topline+=winlines - BOTTOM_OFFSET;
111  if ( (v->topline+winlines-BOTTOM_OFFSET) > v->textlines) {
112    v->topline = v->textlines - winlines + BOTTOM_OFFSET;
113  }
114  owl_window_dirty(v->window);
115}
116
117void owl_viewwin_linedown(owl_viewwin *v)
118{
119  int winlines;
120  owl_window_get_position(v->window, &winlines, 0, 0, 0);
121  v->topline++;
122  if ( (v->topline+winlines-BOTTOM_OFFSET) > v->textlines) {
123    v->topline = v->textlines - winlines + BOTTOM_OFFSET;
124  }
125  owl_window_dirty(v->window);
126}
127
128void owl_viewwin_pageup(owl_viewwin *v)
129{
130  int winlines;
131  owl_window_get_position(v->window, &winlines, 0, 0, 0);
132  v->topline-=winlines;
133  if (v->topline<0) v->topline=0;
134  owl_window_dirty(v->window);
135}
136
137void owl_viewwin_lineup(owl_viewwin *v)
138{
139  v->topline--;
140  if (v->topline<0) v->topline=0;
141  owl_window_dirty(v->window);
142}
143
144void owl_viewwin_right(owl_viewwin *v, int n)
145{
146  v->rightshift+=n;
147  owl_window_dirty(v->window);
148}
149
150void owl_viewwin_left(owl_viewwin *v, int n)
151{
152  v->rightshift-=n;
153  if (v->rightshift<0) v->rightshift=0;
154  owl_window_dirty(v->window);
155}
156
157void owl_viewwin_top(owl_viewwin *v)
158{
159  v->topline=0;
160  v->rightshift=0;
161  owl_window_dirty(v->window);
162}
163
164void owl_viewwin_bottom(owl_viewwin *v)
165{
166  int winlines;
167  owl_window_get_position(v->window, &winlines, 0, 0, 0);
168  v->topline = v->textlines - winlines + BOTTOM_OFFSET;
169  owl_window_dirty(v->window);
170}
171
172void owl_viewwin_cleanup(owl_viewwin *v)
173{
174  owl_viewwin_set_window(v, NULL);
175  if (v->onclose_hook) {
176    v->onclose_hook(v, v->onclose_hook_data);
177    v->onclose_hook = NULL;
178    v->onclose_hook_data = NULL;
179  }
180  owl_fmtext_cleanup(&(v->fmtext));
181}
Note: See TracBrowser for help on using the repository browser.