source: popwin.c @ b343c2c

release-1.8release-1.9
Last change on this file since b343c2c was d427f08, checked in by Nelson Elhage <nelhage@mit.edu>, 10 years ago
Use G_GNUC_WARN_UNUSED_RESULT Have gcc warn us when we ignore the result of a function that requires the caller to free the result, or an initilization function that can fail. This might help (slightly) with preventing leaks and segfaults. Additionally changed some functions that should never fail to not return values. (The owl_list_* functions changed only fail if list->size < 0, which we assume is not the case elsewhere.)
  • Property mode set to 100644
File size: 2.7 KB
Line 
1#include "owl.h"
2
3G_GNUC_WARN_UNUSED_RESULT owl_popwin *owl_popwin_new(void)
4{
5  owl_popwin *pw = g_new0(owl_popwin, 1);
6
7  pw->border = owl_window_new(NULL);
8  pw->content = owl_window_new(pw->border);
9  /* To be thorough, we ensure each signal is disconnected when we close. */
10  pw->sig_redraw_id =
11    g_signal_connect(pw->border, "redraw", G_CALLBACK(owl_popwin_draw_border), 0);
12  pw->sig_resize_id =
13    g_signal_connect(pw->border, "resized", G_CALLBACK(owl_popwin_size_content), pw);
14  owl_signal_connect_object(owl_window_get_screen(), "resized", G_CALLBACK(owl_popwin_size_border), pw->border, 0);
15
16  /* bootstrap sizing */
17  owl_popwin_size_border(owl_window_get_screen(), pw->border);
18
19  owl_window_show(pw->content);
20
21  return pw;
22}
23
24int owl_popwin_up(owl_popwin *pw)
25{
26  if (owl_window_is_shown(pw->border))
27    return 1;
28  owl_window_show(pw->border);
29  return 0;
30}
31
32void owl_popwin_size_border(owl_window *parent, void *user_data)
33{
34  int lines, cols, startline, startcol;
35  int glines, gcols;
36  owl_window *border = user_data;
37
38  owl_window_get_position(parent, &glines, &gcols, 0, 0);
39
40  lines = MIN(glines, 24) * 3/4 + MAX(glines - 24, 0) / 2;
41  startline = (glines-lines)/2;
42  cols = MIN(gcols, 90) * 15 / 16 + MAX(gcols - 90, 0) / 2;
43  startcol = (gcols-cols)/2;
44
45  owl_window_set_position(border, lines, cols, startline, startcol);
46}
47
48void owl_popwin_size_content(owl_window *parent, void *user_data)
49{
50  int lines, cols;
51  owl_popwin *pw = user_data;
52  owl_window_get_position(parent, &lines, &cols, 0, 0);
53  owl_window_set_position(pw->content, lines-2, cols-2, 1, 1);
54}
55
56void owl_popwin_draw_border(owl_window *w, WINDOW *borderwin, void *user_data)
57{
58  int lines, cols;
59  owl_window_get_position(w, &lines, &cols, 0, 0);
60  if (owl_global_is_fancylines(&g)) {
61    box(borderwin, 0, 0);
62  } else {
63    box(borderwin, '|', '-');
64    wmove(borderwin, 0, 0);
65    waddch(borderwin, '+');
66    wmove(borderwin, lines-1, 0);
67    waddch(borderwin, '+');
68    wmove(borderwin, lines-1, cols-1);
69    waddch(borderwin, '+');
70    wmove(borderwin, 0, cols-1);
71    waddch(borderwin, '+');
72  }
73}
74
75int owl_popwin_close(owl_popwin *pw)
76{
77  if (!owl_window_is_shown(pw->border))
78    return 1;
79  owl_window_hide(pw->border);
80  return 0;
81}
82
83void owl_popwin_delete(owl_popwin *pw)
84{
85  owl_popwin_close(pw);
86
87  /* Remove everything that references us. */
88  g_signal_handler_disconnect(pw->border, pw->sig_resize_id);
89  g_signal_handler_disconnect(pw->border, pw->sig_redraw_id);
90  owl_window_unlink(pw->border);
91  g_object_unref(pw->border);
92  g_object_unref(pw->content);
93
94  g_free(pw);
95}
96
97int owl_popwin_is_active(const owl_popwin *pw)
98{
99  return owl_window_is_shown(pw->border);
100}
101
102owl_window *owl_popwin_get_content(const owl_popwin *pw)
103{
104  return pw->content;
105}
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