[7d4fbcd] | 1 | #include <string.h> |
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| 2 | #include "owl.h" |
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| 3 | |
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| 4 | #define BOTTOM_OFFSET 1 |
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[9116936] | 5 | #define EMPTY_INDICATOR "~" |
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[7d4fbcd] | 6 | |
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[60c1386] | 7 | static void owl_viewwin_redraw_content(owl_window *w, WINDOW *curswin, void *user_data); |
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| 8 | static void owl_viewwin_redraw_status(owl_window *w, WINDOW *curswin, void *user_data); |
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| 9 | static void owl_viewwin_layout(owl_viewwin *v); |
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[61c1f19] | 10 | static void owl_viewwin_set_window(owl_viewwin *v, owl_window *w); |
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[0b9e607] | 11 | |
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[9eb38bb] | 12 | /* Create a viewwin. 'win' is an already initialized owl_window that |
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| 13 | * will be used by the viewwin |
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[b2b0773] | 14 | */ |
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[9eb38bb] | 15 | owl_viewwin *owl_viewwin_new_text(owl_window *win, const char *text) |
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[b2b0773] | 16 | { |
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[9eb38bb] | 17 | owl_viewwin *v = owl_malloc(sizeof(owl_viewwin)); |
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| 18 | memset(v, 0, sizeof(*v)); |
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[7d4fbcd] | 19 | owl_fmtext_init_null(&(v->fmtext)); |
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| 20 | if (text) { |
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| 21 | owl_fmtext_append_normal(&(v->fmtext), text); |
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[4083c49] | 22 | if (text[0] != '\0' && text[strlen(text) - 1] != '\n') { |
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[7d4fbcd] | 23 | owl_fmtext_append_normal(&(v->fmtext), "\n"); |
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| 24 | } |
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| 25 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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| 26 | } |
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| 27 | v->topline=0; |
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| 28 | v->rightshift=0; |
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[afbf668] | 29 | v->onclose_hook = NULL; |
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[68f63a2] | 30 | |
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| 31 | owl_viewwin_set_window(v, win); |
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[9eb38bb] | 32 | return v; |
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[afbf668] | 33 | } |
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| 34 | |
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[9eb38bb] | 35 | /* Create a viewwin. 'win' is an already initialized owl_window that |
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| 36 | * will be used by the viewwin |
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[b2b0773] | 37 | */ |
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[9eb38bb] | 38 | owl_viewwin *owl_viewwin_new_fmtext(owl_window *win, const owl_fmtext *fmtext) |
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[b2b0773] | 39 | { |
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[dd6af02] | 40 | char *text; |
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[9eb38bb] | 41 | owl_viewwin *v = owl_malloc(sizeof(owl_viewwin)); |
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| 42 | memset(v, 0, sizeof(*v)); |
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[dd6af02] | 43 | |
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[7d4fbcd] | 44 | owl_fmtext_copy(&(v->fmtext), fmtext); |
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[dd6af02] | 45 | text = owl_fmtext_print_plain(fmtext); |
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| 46 | if (text[0] != '\0' && text[strlen(text) - 1] != '\n') { |
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| 47 | owl_fmtext_append_normal(&(v->fmtext), "\n"); |
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| 48 | } |
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[3e55268] | 49 | owl_free(text); |
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[7d4fbcd] | 50 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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| 51 | v->topline=0; |
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| 52 | v->rightshift=0; |
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[68f63a2] | 53 | |
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| 54 | owl_viewwin_set_window(v, win); |
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[9eb38bb] | 55 | return v; |
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[7d4fbcd] | 56 | } |
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| 57 | |
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[61c1f19] | 58 | static void owl_viewwin_set_window(owl_viewwin *v, owl_window *w) |
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[b2b0773] | 59 | { |
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[60c1386] | 60 | v->window = g_object_ref(w); |
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| 61 | v->content = owl_window_new(v->window); |
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| 62 | v->status = owl_window_new(v->window); |
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| 63 | |
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| 64 | v->sig_content_redraw_id = |
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| 65 | g_signal_connect(v->content, "redraw", G_CALLBACK(owl_viewwin_redraw_content), v); |
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| 66 | v->sig_status_redraw_id = |
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| 67 | g_signal_connect(v->status, "redraw", G_CALLBACK(owl_viewwin_redraw_status), v); |
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| 68 | v->sig_resize_id = |
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| 69 | g_signal_connect_swapped(v->window, "resized", G_CALLBACK(owl_viewwin_layout), v); |
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| 70 | owl_viewwin_layout(v); |
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| 71 | |
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| 72 | owl_window_show(v->content); |
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| 73 | owl_window_show(v->status); |
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[7d4fbcd] | 74 | } |
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| 75 | |
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[afbf668] | 76 | void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) { |
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| 77 | v->onclose_hook = onclose_hook; |
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| 78 | v->onclose_hook_data = onclose_hook_data; |
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| 79 | } |
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| 80 | |
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[60c1386] | 81 | static void owl_viewwin_layout(owl_viewwin *v) |
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| 82 | { |
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| 83 | int lines, cols; |
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| 84 | owl_window_get_position(v->window, &lines, &cols, NULL, NULL); |
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| 85 | owl_window_set_position(v->content, lines - BOTTOM_OFFSET, cols, 0, 0); |
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| 86 | owl_window_set_position(v->status, BOTTOM_OFFSET, cols, lines - BOTTOM_OFFSET, 0); |
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| 87 | } |
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| 88 | |
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[b2b0773] | 89 | /* regenerate text on the curses window. */ |
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[60c1386] | 90 | static void owl_viewwin_redraw_content(owl_window *w, WINDOW *curswin, void *user_data) |
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[b2b0773] | 91 | { |
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[7d4fbcd] | 92 | owl_fmtext fm1, fm2; |
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[68f63a2] | 93 | owl_viewwin *v = user_data; |
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[c447d9c] | 94 | int winlines, wincols; |
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[9116936] | 95 | int y; |
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[c447d9c] | 96 | |
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| 97 | owl_window_get_position(w, &winlines, &wincols, 0, 0); |
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[60c1386] | 98 | |
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[68f63a2] | 99 | werase(curswin); |
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| 100 | wmove(curswin, 0, 0); |
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[7d4fbcd] | 101 | |
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[af2ca19] | 102 | owl_fmtext_init_null(&fm1); |
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| 103 | owl_fmtext_init_null(&fm2); |
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[60c1386] | 104 | |
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| 105 | owl_fmtext_truncate_lines(&(v->fmtext), v->topline, winlines, &fm1); |
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[c447d9c] | 106 | owl_fmtext_truncate_cols(&fm1, v->rightshift, wincols-1+v->rightshift, &fm2); |
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[7d4fbcd] | 107 | |
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[449c682] | 108 | owl_fmtext_curs_waddstr(&fm2, curswin); |
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[7d4fbcd] | 109 | |
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[9116936] | 110 | /* Fill remaining lines with tildes. */ |
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| 111 | y = v->textlines - v->topline; |
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| 112 | wmove(curswin, y, 0); |
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[60c1386] | 113 | for (; y < winlines; y++) { |
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[9116936] | 114 | waddstr(curswin, EMPTY_INDICATOR); |
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| 115 | waddstr(curswin, "\n"); |
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| 116 | } |
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| 117 | |
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[60c1386] | 118 | owl_fmtext_cleanup(&fm1); |
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| 119 | owl_fmtext_cleanup(&fm2); |
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| 120 | } |
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| 121 | |
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| 122 | static void owl_viewwin_redraw_status(owl_window *w, WINDOW *curswin, void *user_data) |
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| 123 | { |
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| 124 | owl_viewwin *v = user_data; |
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| 125 | int winlines, wincols; |
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| 126 | |
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| 127 | owl_window_get_position(v->content, &winlines, &wincols, 0, 0); |
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| 128 | |
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| 129 | werase(curswin); |
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| 130 | wmove(curswin, 0, 0); |
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[68f63a2] | 131 | wattrset(curswin, A_REVERSE); |
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[60c1386] | 132 | if (v->textlines - v->topline > winlines) { |
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[68f63a2] | 133 | waddstr(curswin, "--More-- (Space to see more, 'q' to quit)"); |
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[7d4fbcd] | 134 | } else { |
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[68f63a2] | 135 | waddstr(curswin, "--End-- (Press 'q' to quit)"); |
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[7d4fbcd] | 136 | } |
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[68f63a2] | 137 | wattroff(curswin, A_REVERSE); |
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[7d4fbcd] | 138 | } |
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| 139 | |
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[2640b63] | 140 | void owl_viewwin_append_text(owl_viewwin *v, const char *text) { |
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| 141 | owl_fmtext_append_normal(&(v->fmtext), text); |
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| 142 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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| 143 | owl_viewwin_dirty(v); |
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| 144 | } |
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| 145 | |
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| 146 | /* Schedule a redraw of 'v'. Exported for hooking into the search |
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| 147 | string; when we have some way of listening for changes, this can be |
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| 148 | removed. */ |
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| 149 | void owl_viewwin_dirty(owl_viewwin *v) |
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| 150 | { |
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[60c1386] | 151 | owl_window_dirty(v->content); |
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| 152 | owl_window_dirty(v->status); |
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[2640b63] | 153 | } |
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| 154 | |
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[d574d61] | 155 | void owl_viewwin_down(owl_viewwin *v, int amount) { |
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[c447d9c] | 156 | int winlines; |
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[60c1386] | 157 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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[fa23002] | 158 | /* Don't scroll past the bottom. */ |
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[60c1386] | 159 | amount = MIN(amount, v->textlines - (v->topline + winlines)); |
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[fa23002] | 160 | /* But if we're already past the bottom, don't back up either. */ |
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| 161 | if (amount > 0) { |
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| 162 | v->topline += amount; |
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| 163 | owl_viewwin_dirty(v); |
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[7d4fbcd] | 164 | } |
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| 165 | } |
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| 166 | |
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[d574d61] | 167 | void owl_viewwin_up(owl_viewwin *v, int amount) |
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| 168 | { |
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| 169 | v->topline -= amount; |
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| 170 | if (v->topline<0) v->topline=0; |
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| 171 | owl_viewwin_dirty(v); |
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| 172 | } |
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| 173 | |
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| 174 | void owl_viewwin_pagedown(owl_viewwin *v) |
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[b2b0773] | 175 | { |
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[c447d9c] | 176 | int winlines; |
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[60c1386] | 177 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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| 178 | owl_viewwin_down(v, winlines); |
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[d574d61] | 179 | } |
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| 180 | |
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| 181 | void owl_viewwin_linedown(owl_viewwin *v) |
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| 182 | { |
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| 183 | owl_viewwin_down(v, 1); |
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[7d4fbcd] | 184 | } |
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| 185 | |
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[b2b0773] | 186 | void owl_viewwin_pageup(owl_viewwin *v) |
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| 187 | { |
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[c447d9c] | 188 | int winlines; |
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[60c1386] | 189 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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| 190 | owl_viewwin_up(v, winlines); |
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[7d4fbcd] | 191 | } |
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| 192 | |
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[b2b0773] | 193 | void owl_viewwin_lineup(owl_viewwin *v) |
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| 194 | { |
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[d574d61] | 195 | owl_viewwin_up(v, 1); |
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[7d4fbcd] | 196 | } |
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| 197 | |
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[b2b0773] | 198 | void owl_viewwin_right(owl_viewwin *v, int n) |
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| 199 | { |
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[7d4fbcd] | 200 | v->rightshift+=n; |
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[5b68c05] | 201 | owl_viewwin_dirty(v); |
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[7d4fbcd] | 202 | } |
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| 203 | |
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[b2b0773] | 204 | void owl_viewwin_left(owl_viewwin *v, int n) |
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| 205 | { |
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[7d4fbcd] | 206 | v->rightshift-=n; |
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| 207 | if (v->rightshift<0) v->rightshift=0; |
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[5b68c05] | 208 | owl_viewwin_dirty(v); |
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[7d4fbcd] | 209 | } |
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| 210 | |
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[b2b0773] | 211 | void owl_viewwin_top(owl_viewwin *v) |
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| 212 | { |
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[7d4fbcd] | 213 | v->topline=0; |
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| 214 | v->rightshift=0; |
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[5b68c05] | 215 | owl_viewwin_dirty(v); |
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[7d4fbcd] | 216 | } |
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| 217 | |
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[b2b0773] | 218 | void owl_viewwin_bottom(owl_viewwin *v) |
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| 219 | { |
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[c447d9c] | 220 | int winlines; |
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[60c1386] | 221 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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| 222 | v->topline = v->textlines - winlines; |
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[5b68c05] | 223 | owl_viewwin_dirty(v); |
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[7d4fbcd] | 224 | } |
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| 225 | |
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[b8742ba] | 226 | /* Scroll in 'direction' to the next line containing 're' in 'v', |
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| 227 | * starting from the current line. Returns 0 if no occurrence is |
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| 228 | * found. |
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| 229 | * |
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| 230 | * If mode==0 then stay on the current line if it matches. |
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| 231 | */ |
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| 232 | int owl_viewwin_search(owl_viewwin *v, const owl_regex *re, int mode, int direction) |
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| 233 | { |
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| 234 | int start, end, offset; |
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| 235 | owl_fmtext_line_extents(&v->fmtext, v->topline, &start, &end); |
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| 236 | if (direction == OWL_DIRECTION_DOWNWARDS) { |
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| 237 | offset = owl_fmtext_search(&v->fmtext, re, mode ? end : start); |
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| 238 | if (offset < 0) |
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| 239 | return 0; |
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| 240 | v->topline = owl_fmtext_line_number(&v->fmtext, offset); |
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| 241 | owl_viewwin_dirty(v); |
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| 242 | return 1; |
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| 243 | } else { |
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| 244 | /* FIXME */ |
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| 245 | owl_function_error("Upwards searching is not implemented in viewwin."); |
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| 246 | return 1; |
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| 247 | } |
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| 248 | } |
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| 249 | |
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[9eb38bb] | 250 | void owl_viewwin_delete(owl_viewwin *v) |
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[b2b0773] | 251 | { |
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[afbf668] | 252 | if (v->onclose_hook) { |
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| 253 | v->onclose_hook(v, v->onclose_hook_data); |
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[8721756] | 254 | v->onclose_hook = NULL; |
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| 255 | v->onclose_hook_data = NULL; |
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[afbf668] | 256 | } |
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[60c1386] | 257 | /* TODO: This is far too tedious. owl_viewwin should own v->window |
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| 258 | * and just unlink it in one go. Signals should also go away for |
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| 259 | * free. */ |
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| 260 | g_signal_handler_disconnect(v->window, v->sig_resize_id); |
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| 261 | g_signal_handler_disconnect(v->content, v->sig_content_redraw_id); |
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| 262 | g_signal_handler_disconnect(v->status, v->sig_status_redraw_id); |
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| 263 | owl_window_unlink(v->content); |
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| 264 | owl_window_unlink(v->status); |
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| 265 | g_object_unref(v->window); |
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| 266 | g_object_unref(v->content); |
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| 267 | g_object_unref(v->status); |
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[7ab0020] | 268 | owl_fmtext_cleanup(&(v->fmtext)); |
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[9eb38bb] | 269 | owl_free(v); |
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[7d4fbcd] | 270 | } |
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