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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5 | |
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6 | static void owl_viewwin_redraw_content(owl_window *w, WINDOW *curswin, void *user_data); |
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7 | static void owl_viewwin_redraw_status(owl_window *w, WINDOW *curswin, void *user_data); |
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8 | static void owl_viewwin_layout(owl_viewwin *v); |
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9 | static void owl_viewwin_set_window(owl_viewwin *v, owl_window *w); |
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10 | |
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11 | /* Create a viewwin. 'win' is an already initialized owl_window that |
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12 | * will be used by the viewwin |
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13 | */ |
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14 | owl_viewwin *owl_viewwin_new_text(owl_window *win, const char *text) |
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15 | { |
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16 | owl_viewwin *v = g_new0(owl_viewwin, 1); |
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17 | owl_fmtext_init_null(&(v->fmtext)); |
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18 | if (text) { |
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19 | owl_fmtext_append_normal(&(v->fmtext), text); |
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20 | if (text[0] != '\0' && text[strlen(text) - 1] != '\n') { |
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21 | owl_fmtext_append_normal(&(v->fmtext), "\n"); |
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22 | } |
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23 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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24 | } |
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25 | v->topline=0; |
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26 | v->rightshift=0; |
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27 | v->onclose_hook = NULL; |
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28 | |
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29 | owl_viewwin_set_window(v, win); |
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30 | return v; |
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31 | } |
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32 | |
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33 | /* Create a viewwin. 'win' is an already initialized owl_window that |
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34 | * will be used by the viewwin |
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35 | */ |
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36 | owl_viewwin *owl_viewwin_new_fmtext(owl_window *win, const owl_fmtext *fmtext) |
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37 | { |
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38 | char *text; |
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39 | owl_viewwin *v = g_new0(owl_viewwin, 1); |
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40 | |
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41 | owl_fmtext_copy(&(v->fmtext), fmtext); |
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42 | text = owl_fmtext_print_plain(fmtext); |
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43 | if (text[0] != '\0' && text[strlen(text) - 1] != '\n') { |
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44 | owl_fmtext_append_normal(&(v->fmtext), "\n"); |
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45 | } |
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46 | g_free(text); |
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47 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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48 | v->topline=0; |
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49 | v->rightshift=0; |
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50 | |
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51 | owl_viewwin_set_window(v, win); |
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52 | return v; |
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53 | } |
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54 | |
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55 | static void owl_viewwin_set_window(owl_viewwin *v, owl_window *w) |
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56 | { |
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57 | v->window = g_object_ref(w); |
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58 | v->content = owl_window_new(v->window); |
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59 | v->status = owl_window_new(v->window); |
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60 | v->cmdwin = NULL; |
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61 | |
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62 | v->sig_content_redraw_id = |
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63 | g_signal_connect(v->content, "redraw", G_CALLBACK(owl_viewwin_redraw_content), v); |
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64 | v->sig_status_redraw_id = |
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65 | g_signal_connect(v->status, "redraw", G_CALLBACK(owl_viewwin_redraw_status), v); |
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66 | v->sig_resize_id = |
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67 | g_signal_connect_swapped(v->window, "resized", G_CALLBACK(owl_viewwin_layout), v); |
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68 | owl_viewwin_layout(v); |
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69 | |
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70 | owl_window_show(v->content); |
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71 | owl_window_show(v->status); |
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72 | } |
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73 | |
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74 | 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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75 | v->onclose_hook = onclose_hook; |
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76 | v->onclose_hook_data = onclose_hook_data; |
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77 | } |
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78 | |
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79 | static void owl_viewwin_layout(owl_viewwin *v) |
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80 | { |
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81 | int lines, cols; |
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82 | owl_window_get_position(v->window, &lines, &cols, NULL, NULL); |
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83 | owl_window_set_position(v->content, lines - BOTTOM_OFFSET, cols, 0, 0); |
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84 | /* Only one of these will be visible at a time: */ |
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85 | owl_window_set_position(v->status, BOTTOM_OFFSET, cols, lines - BOTTOM_OFFSET, 0); |
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86 | if (v->cmdwin) |
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87 | owl_window_set_position(v->cmdwin, BOTTOM_OFFSET, cols, lines - BOTTOM_OFFSET, 0); |
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88 | } |
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89 | |
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90 | /* regenerate text on the curses window. */ |
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91 | static void owl_viewwin_redraw_content(owl_window *w, WINDOW *curswin, void *user_data) |
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92 | { |
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93 | owl_fmtext fm1, fm2; |
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94 | owl_viewwin *v = user_data; |
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95 | int winlines, wincols; |
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96 | |
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97 | owl_window_get_position(w, &winlines, &wincols, 0, 0); |
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98 | |
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99 | werase(curswin); |
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100 | wmove(curswin, 0, 0); |
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101 | |
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102 | owl_fmtext_init_null(&fm1); |
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103 | owl_fmtext_init_null(&fm2); |
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104 | |
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105 | owl_fmtext_truncate_lines(&(v->fmtext), v->topline, winlines, &fm1); |
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106 | owl_fmtext_truncate_cols(&fm1, v->rightshift, wincols-1+v->rightshift, &fm2); |
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107 | |
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108 | owl_fmtext_curs_waddstr(&fm2, curswin, OWL_FMTEXT_ATTR_NONE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT); |
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109 | |
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110 | owl_fmtext_cleanup(&fm1); |
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111 | owl_fmtext_cleanup(&fm2); |
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112 | } |
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113 | |
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114 | static void owl_viewwin_redraw_status(owl_window *w, WINDOW *curswin, void *user_data) |
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115 | { |
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116 | owl_viewwin *v = user_data; |
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117 | int winlines, wincols; |
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118 | |
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119 | owl_window_get_position(v->content, &winlines, &wincols, 0, 0); |
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120 | |
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121 | werase(curswin); |
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122 | wmove(curswin, 0, 0); |
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123 | wattrset(curswin, A_REVERSE); |
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124 | if (v->textlines - v->topline > winlines) { |
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125 | waddstr(curswin, "--More-- (Space to see more, 'q' to quit)"); |
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126 | } else { |
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127 | waddstr(curswin, "--End-- (Press 'q' to quit)"); |
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128 | } |
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129 | wattroff(curswin, A_REVERSE); |
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130 | } |
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131 | |
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132 | char *owl_viewwin_command_search(owl_viewwin *v, int argc, const char *const *argv, const char *buff) |
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133 | { |
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134 | int direction, consider_current; |
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135 | const char *buffstart; |
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136 | |
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137 | direction=OWL_DIRECTION_DOWNWARDS; |
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138 | buffstart=skiptokens(buff, 1); |
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139 | if (argc>1 && !strcmp(argv[1], "-r")) { |
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140 | direction=OWL_DIRECTION_UPWARDS; |
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141 | buffstart=skiptokens(buff, 2); |
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142 | } |
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143 | |
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144 | if (argc==1 || (argc==2 && !strcmp(argv[1], "-r"))) { |
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145 | consider_current = false; |
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146 | } else { |
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147 | owl_function_set_search(buffstart); |
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148 | consider_current = true; |
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149 | } |
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150 | |
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151 | if (!owl_viewwin_search(v, owl_global_get_search_re(&g), consider_current, direction)) |
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152 | owl_function_error("No more matches"); |
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153 | return NULL; |
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154 | } |
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155 | |
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156 | typedef struct _owl_viewwin_search_data { /*noproto*/ |
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157 | owl_viewwin *v; |
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158 | int direction; |
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159 | } owl_viewwin_search_data; |
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160 | |
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161 | static void owl_viewwin_callback_search(owl_editwin *e) |
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162 | { |
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163 | int consider_current = false; |
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164 | const char *line = owl_editwin_get_text(e); |
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165 | owl_viewwin_search_data *data = owl_editwin_get_cbdata(e); |
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166 | |
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167 | /* Given an empty string, just continue the current search. */ |
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168 | if (line && *line) { |
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169 | owl_function_set_search(line); |
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170 | consider_current = true; |
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171 | } |
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172 | if (!owl_viewwin_search(data->v, owl_global_get_search_re(&g), |
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173 | consider_current, data->direction)) |
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174 | owl_function_error("No matches"); |
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175 | } |
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176 | |
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177 | char *owl_viewwin_command_start_search(owl_viewwin *v, int argc, const char *const *argv, const char *buff) |
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178 | { |
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179 | int direction; |
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180 | const char *buffstart; |
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181 | owl_editwin *tw; |
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182 | owl_context *ctx; |
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183 | owl_viewwin_search_data *data; |
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184 | |
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185 | direction=OWL_DIRECTION_DOWNWARDS; |
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186 | buffstart=skiptokens(buff, 1); |
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187 | if (argc>1 && !strcmp(argv[1], "-r")) { |
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188 | direction=OWL_DIRECTION_UPWARDS; |
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189 | buffstart=skiptokens(buff, 2); |
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190 | } |
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191 | |
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192 | /* TODO: Add a search history? */ |
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193 | tw = owl_viewwin_set_typwin_active(v, NULL); |
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194 | owl_editwin_set_locktext(tw, (direction == OWL_DIRECTION_DOWNWARDS) ? "/" : "?"); |
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195 | owl_editwin_insert_string(tw, buffstart); |
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196 | |
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197 | data = g_new(owl_viewwin_search_data, 1); |
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198 | data->v = v; |
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199 | data->direction = direction; |
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200 | |
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201 | ctx = owl_editcontext_new(OWL_CTX_EDITLINE, tw, "editline", |
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202 | owl_viewwin_deactivate_editcontext, v); |
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203 | ctx->cbdata = v; |
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204 | owl_global_push_context_obj(&g, ctx); |
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205 | owl_editwin_set_callback(tw, owl_viewwin_callback_search); |
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206 | owl_editwin_set_cbdata(tw, data, g_free); |
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207 | /* We aren't saving tw, so release the reference we were given. */ |
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208 | owl_editwin_unref(tw); |
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209 | return NULL; |
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210 | } |
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211 | |
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212 | char *owl_viewwin_start_command(owl_viewwin *v, int argc, const char *const *argv, const char *buff) |
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213 | { |
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214 | owl_editwin *tw; |
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215 | owl_context *ctx; |
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216 | |
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217 | buff = skiptokens(buff, 1); |
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218 | |
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219 | tw = owl_viewwin_set_typwin_active(v, owl_global_get_cmd_history(&g)); |
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220 | owl_editwin_set_locktext(tw, ":"); |
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221 | |
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222 | owl_editwin_insert_string(tw, buff); |
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223 | |
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224 | ctx = owl_editcontext_new(OWL_CTX_EDITLINE, tw, "editline", |
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225 | owl_viewwin_deactivate_editcontext, v); |
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226 | owl_global_push_context_obj(&g, ctx); |
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227 | owl_editwin_set_callback(tw, owl_callback_command); |
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228 | /* We aren't saving tw, so release the reference we were given. */ |
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229 | owl_editwin_unref(tw); |
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230 | |
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231 | return NULL; |
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232 | } |
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233 | |
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234 | void owl_viewwin_deactivate_editcontext(owl_context *ctx) { |
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235 | owl_viewwin *v = ctx->cbdata; |
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236 | owl_viewwin_set_typwin_inactive(v); |
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237 | } |
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238 | |
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239 | owl_editwin *owl_viewwin_set_typwin_active(owl_viewwin *v, owl_history *hist) { |
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240 | int lines, cols; |
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241 | owl_editwin *cmdline; |
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242 | if (v->cmdwin) |
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243 | return NULL; |
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244 | /* Create the command line. */ |
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245 | v->cmdwin = owl_window_new(v->window); |
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246 | owl_viewwin_layout(v); |
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247 | owl_window_get_position(v->cmdwin, &lines, &cols, NULL, NULL); |
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248 | cmdline = owl_editwin_new(v->cmdwin, lines, cols, OWL_EDITWIN_STYLE_ONELINE, hist); |
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249 | /* Swap out the bottom window. */ |
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250 | owl_window_hide(v->status); |
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251 | owl_window_show(v->cmdwin); |
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252 | return cmdline; |
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253 | } |
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254 | |
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255 | void owl_viewwin_set_typwin_inactive(owl_viewwin *v) { |
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256 | if (v->cmdwin) { |
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257 | /* Swap out the bottom window. */ |
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258 | owl_window_hide(v->cmdwin); |
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259 | owl_window_show(v->status); |
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260 | /* Destroy the window itself. */ |
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261 | owl_window_unlink(v->cmdwin); |
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262 | g_object_unref(v->cmdwin); |
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263 | v->cmdwin = NULL; |
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264 | } |
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265 | } |
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266 | |
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267 | void owl_viewwin_append_text(owl_viewwin *v, const char *text) { |
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268 | owl_fmtext_append_normal(&(v->fmtext), text); |
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269 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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270 | owl_viewwin_dirty(v); |
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271 | } |
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272 | |
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273 | /* Schedule a redraw of 'v'. Exported for hooking into the search |
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274 | string; when we have some way of listening for changes, this can be |
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275 | removed. */ |
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276 | void owl_viewwin_dirty(owl_viewwin *v) |
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277 | { |
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278 | owl_window_dirty(v->content); |
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279 | owl_window_dirty(v->status); |
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280 | } |
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281 | |
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282 | void owl_viewwin_down(owl_viewwin *v, int amount) { |
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283 | int winlines; |
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284 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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285 | /* Don't scroll past the bottom. */ |
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286 | amount = MIN(amount, v->textlines - (v->topline + winlines)); |
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287 | /* But if we're already past the bottom, don't back up either. */ |
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288 | if (amount > 0) { |
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289 | v->topline += amount; |
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290 | owl_viewwin_dirty(v); |
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291 | } |
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292 | } |
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293 | |
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294 | void owl_viewwin_up(owl_viewwin *v, int amount) |
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295 | { |
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296 | v->topline -= amount; |
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297 | if (v->topline<0) v->topline=0; |
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298 | owl_viewwin_dirty(v); |
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299 | } |
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300 | |
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301 | void owl_viewwin_pagedown(owl_viewwin *v) |
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302 | { |
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303 | int winlines; |
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304 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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305 | owl_viewwin_down(v, winlines); |
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306 | } |
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307 | |
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308 | void owl_viewwin_linedown(owl_viewwin *v) |
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309 | { |
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310 | owl_viewwin_down(v, 1); |
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311 | } |
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312 | |
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313 | void owl_viewwin_pageup(owl_viewwin *v) |
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314 | { |
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315 | int winlines; |
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316 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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317 | owl_viewwin_up(v, winlines); |
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318 | } |
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319 | |
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320 | void owl_viewwin_lineup(owl_viewwin *v) |
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321 | { |
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322 | owl_viewwin_up(v, 1); |
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323 | } |
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324 | |
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325 | void owl_viewwin_right(owl_viewwin *v, int n) |
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326 | { |
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327 | v->rightshift+=n; |
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328 | owl_viewwin_dirty(v); |
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329 | } |
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330 | |
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331 | void owl_viewwin_left(owl_viewwin *v, int n) |
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332 | { |
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333 | v->rightshift-=n; |
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334 | if (v->rightshift<0) v->rightshift=0; |
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335 | owl_viewwin_dirty(v); |
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336 | } |
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337 | |
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338 | void owl_viewwin_top(owl_viewwin *v) |
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339 | { |
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340 | v->topline=0; |
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341 | v->rightshift=0; |
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342 | owl_viewwin_dirty(v); |
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343 | } |
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344 | |
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345 | void owl_viewwin_bottom(owl_viewwin *v) |
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346 | { |
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347 | int winlines; |
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348 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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349 | v->topline = v->textlines - winlines; |
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350 | owl_viewwin_dirty(v); |
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351 | } |
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352 | |
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353 | /* This is a bit of a hack, because regexec doesn't have an 'n' |
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354 | * version. */ |
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355 | static int _re_memcompare(const owl_regex *re, const char *string, int start, int end) |
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356 | { |
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357 | int ans; |
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358 | char *tmp = g_strndup(string + start, end - start); |
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359 | ans = owl_regex_compare(re, tmp, NULL, NULL); |
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360 | g_free(tmp); |
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361 | return !ans; |
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362 | } |
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363 | |
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364 | /* Scroll in 'direction' to the next line containing 're' in 'v', |
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365 | * starting from the current line. Returns 0 if no occurrence is |
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366 | * found. |
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367 | * |
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368 | * If consider_current is true then stay on the current line |
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369 | * if it matches. |
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370 | */ |
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371 | int owl_viewwin_search(owl_viewwin *v, const owl_regex *re, int consider_current, int direction) |
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372 | { |
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373 | int start, end, offset; |
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374 | int lineend, linestart; |
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375 | const char *buf, *linestartp; |
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376 | owl_fmtext_line_extents(&v->fmtext, v->topline, &start, &end); |
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377 | if (direction == OWL_DIRECTION_DOWNWARDS) { |
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378 | offset = owl_fmtext_search(&v->fmtext, re, |
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379 | consider_current ? start : end); |
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380 | if (offset < 0) |
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381 | return 0; |
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382 | v->topline = owl_fmtext_line_number(&v->fmtext, offset); |
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383 | owl_viewwin_dirty(v); |
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384 | return 1; |
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385 | } else { |
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386 | /* TODO: This is a hack. Really, we should have an owl_fmlines or |
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387 | * something containing an array of owl_fmtext split into |
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388 | * lines. Also, it cannot handle multi-line regex, if we ever care about |
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389 | * them. */ |
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390 | buf = owl_fmtext_get_text(&v->fmtext); |
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391 | lineend = consider_current ? end : start; |
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392 | while (lineend > 0) { |
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393 | linestartp = memrchr(buf, '\n', lineend - 1); |
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394 | linestart = linestartp ? linestartp - buf + 1 : 0; |
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395 | if (_re_memcompare(re, buf, linestart, lineend)) { |
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396 | v->topline = owl_fmtext_line_number(&v->fmtext, linestart); |
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397 | owl_viewwin_dirty(v); |
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398 | return 1; |
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399 | } |
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400 | lineend = linestart; |
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401 | } |
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402 | return 0; |
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403 | } |
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404 | } |
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405 | |
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406 | void owl_viewwin_delete(owl_viewwin *v) |
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407 | { |
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408 | if (v->onclose_hook) { |
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409 | v->onclose_hook(v, v->onclose_hook_data); |
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410 | v->onclose_hook = NULL; |
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411 | v->onclose_hook_data = NULL; |
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412 | } |
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413 | owl_viewwin_set_typwin_inactive(v); |
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414 | /* TODO: This is far too tedious. owl_viewwin should own v->window |
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415 | * and just unlink it in one go. Signals should also go away for |
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416 | * free. */ |
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417 | g_signal_handler_disconnect(v->window, v->sig_resize_id); |
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418 | g_signal_handler_disconnect(v->content, v->sig_content_redraw_id); |
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419 | g_signal_handler_disconnect(v->status, v->sig_status_redraw_id); |
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420 | owl_window_unlink(v->content); |
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421 | owl_window_unlink(v->status); |
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422 | g_object_unref(v->window); |
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423 | g_object_unref(v->content); |
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424 | g_object_unref(v->status); |
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425 | owl_fmtext_cleanup(&(v->fmtext)); |
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426 | g_free(v); |
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427 | } |
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