Commit | Line | Data |
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f377b406 | 1 | /* TUI display source window. |
f33c6cbf | 2 | |
42a4f53d | 3 | Copyright (C) 1998-2019 Free Software Foundation, Inc. |
f33c6cbf | 4 | |
f377b406 SC |
5 | Contributed by Hewlett-Packard Company. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
f377b406 SC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include <ctype.h> | |
24 | #include "symtab.h" | |
25 | #include "frame.h" | |
26 | #include "breakpoint.h" | |
c2c6d25f | 27 | #include "source.h" |
13274fc3 | 28 | #include "objfiles.h" |
a7417d46 | 29 | #include "filenames.h" |
62f29fda | 30 | #include "source-cache.h" |
c906108c | 31 | |
d7b2e967 AC |
32 | #include "tui/tui.h" |
33 | #include "tui/tui-data.h" | |
62f29fda | 34 | #include "tui/tui-io.h" |
d7b2e967 AC |
35 | #include "tui/tui-stack.h" |
36 | #include "tui/tui-winsource.h" | |
37 | #include "tui/tui-source.h" | |
6a83354a | 38 | #include "gdb_curses.h" |
c906108c | 39 | |
62f29fda TT |
40 | /* A helper function for tui_set_source_content that extracts some |
41 | source text from PTR. LINE_NO is the line number; FIRST_COL is the | |
42 | first column to extract, and LINE_WIDTH is the number of characters | |
43 | to display. Returns a string holding the desired text. */ | |
44 | ||
45 | static std::string | |
46 | copy_source_line (const char **ptr, int line_no, int first_col, | |
47 | int line_width) | |
48 | { | |
49 | const char *lineptr = *ptr; | |
50 | ||
51 | /* Init the line with the line number. */ | |
52 | std::string result = string_printf ("%-6d", line_no); | |
53 | int len = result.size (); | |
54 | len = len - ((len / tui_tab_width) * tui_tab_width); | |
55 | result.append (len, ' '); | |
56 | ||
57 | int column = 0; | |
58 | char c; | |
59 | do | |
60 | { | |
61 | int skip_bytes; | |
62 | ||
63 | c = *lineptr; | |
64 | if (c == '\033' && skip_ansi_escape (lineptr, &skip_bytes)) | |
65 | { | |
66 | /* We always have to preserve escapes. */ | |
67 | result.append (lineptr, lineptr + skip_bytes); | |
68 | lineptr += skip_bytes; | |
69 | continue; | |
70 | } | |
71 | ||
72 | ++lineptr; | |
73 | ++column; | |
647bb750 HD |
74 | |
75 | auto process_tab = [&] () | |
76 | { | |
77 | int max_tab_len = tui_tab_width; | |
78 | ||
79 | --column; | |
80 | for (int j = column % max_tab_len; | |
81 | j < max_tab_len && column < first_col + line_width; | |
82 | column++, j++) | |
83 | if (column >= first_col) | |
84 | result.push_back (' '); | |
85 | }; | |
86 | ||
62f29fda TT |
87 | /* We have to process all the text in order to pick up all the |
88 | escapes. */ | |
647bb750 HD |
89 | if (column <= first_col || column > first_col + line_width) |
90 | { | |
91 | if (c == '\t') | |
92 | process_tab (); | |
93 | continue; | |
94 | } | |
62f29fda TT |
95 | |
96 | if (c == '\n' || c == '\r' || c == '\0') | |
97 | { | |
98 | /* Nothing. */ | |
99 | } | |
100 | else if (c < 040 && c != '\t') | |
101 | { | |
102 | result.push_back ('^'); | |
103 | result.push_back (c + 0100); | |
104 | } | |
105 | else if (c == 0177) | |
106 | { | |
107 | result.push_back ('^'); | |
108 | result.push_back ('?'); | |
109 | } | |
110 | else if (c == '\t') | |
647bb750 | 111 | process_tab (); |
62f29fda TT |
112 | else |
113 | result.push_back (c); | |
114 | } | |
115 | while (c != '\0' && c != '\n' && c != '\r'); | |
116 | ||
117 | if (c == '\r' && *lineptr == '\n') | |
118 | ++lineptr; | |
119 | *ptr = lineptr; | |
120 | ||
121 | return result; | |
122 | } | |
123 | ||
98427f35 | 124 | /* Function to display source in the source window. */ |
a358af15 | 125 | enum tui_status |
08ef48c5 MS |
126 | tui_set_source_content (struct symtab *s, |
127 | int line_no, | |
128 | int noerror) | |
c906108c | 129 | { |
22940a24 | 130 | enum tui_status ret = TUI_FAILURE; |
c906108c | 131 | |
cafb3438 | 132 | if (s != NULL) |
c906108c | 133 | { |
62f29fda | 134 | int line_width, nlines; |
c906108c | 135 | |
6d012f14 | 136 | if ((ret = tui_alloc_source_buffer (TUI_SRC_WIN)) == TUI_SUCCESS) |
c906108c | 137 | { |
6ba8e26f | 138 | line_width = TUI_SRC_WIN->generic.width - 1; |
1cc6d956 MS |
139 | /* Take hilite (window border) into account, when |
140 | calculating the number of lines. */ | |
6d012f14 | 141 | nlines = (line_no + (TUI_SRC_WIN->generic.height - 2)) - line_no; |
62f29fda TT |
142 | |
143 | std::string srclines; | |
144 | if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines, | |
145 | &srclines)) | |
c906108c SS |
146 | { |
147 | if (!noerror) | |
148 | { | |
05cba821 | 149 | const char *filename = symtab_to_filename_for_display (s); |
224c3ddb | 150 | char *name = (char *) alloca (strlen (filename) + 100); |
1c5313c5 | 151 | |
05cba821 | 152 | sprintf (name, "%s:%d", filename, line_no); |
c906108c SS |
153 | print_sys_errmsg (name, errno); |
154 | } | |
155 | ret = TUI_FAILURE; | |
156 | } | |
157 | else | |
158 | { | |
62f29fda TT |
159 | int cur_line_no, cur_line; |
160 | struct tui_gen_win_info *locator | |
161 | = tui_locator_win_info_ptr (); | |
162 | struct tui_source_info *src | |
163 | = &TUI_SRC_WIN->detail.source_info; | |
164 | const char *s_filename = symtab_to_filename_for_display (s); | |
165 | ||
166 | if (TUI_SRC_WIN->generic.title) | |
167 | xfree (TUI_SRC_WIN->generic.title); | |
168 | TUI_SRC_WIN->generic.title = xstrdup (s_filename); | |
169 | ||
170 | xfree (src->fullname); | |
171 | src->fullname = xstrdup (symtab_to_fullname (s)); | |
172 | ||
173 | cur_line = 0; | |
174 | src->gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s)); | |
175 | src->start_line_or_addr.loa = LOA_LINE; | |
176 | cur_line_no = src->start_line_or_addr.u.line_no = line_no; | |
177 | ||
178 | const char *iter = srclines.c_str (); | |
179 | while (cur_line < nlines) | |
c906108c | 180 | { |
62f29fda TT |
181 | struct tui_win_element *element |
182 | = TUI_SRC_WIN->generic.content[cur_line]; | |
183 | ||
184 | std::string text; | |
185 | if (*iter != '\0') | |
186 | text = copy_source_line (&iter, cur_line_no, | |
187 | src->horizontal_offset, | |
188 | line_width); | |
189 | ||
190 | /* Set whether element is the execution point | |
191 | and whether there is a break point on it. */ | |
192 | element->which_element.source.line_or_addr.loa = | |
193 | LOA_LINE; | |
194 | element->which_element.source.line_or_addr.u.line_no = | |
195 | cur_line_no; | |
196 | element->which_element.source.is_exec_point = | |
197 | (filename_cmp (locator->content[0] | |
198 | ->which_element.locator.full_name, | |
199 | symtab_to_fullname (s)) == 0 | |
200 | && cur_line_no | |
201 | == locator->content[0] | |
202 | ->which_element.locator.line_no); | |
203 | ||
204 | xfree (TUI_SRC_WIN->generic.content[cur_line] | |
205 | ->which_element.source.line); | |
62f29fda TT |
206 | TUI_SRC_WIN->generic.content[cur_line] |
207 | ->which_element.source.line | |
986041cd | 208 | = xstrdup (text.c_str ()); |
62f29fda TT |
209 | |
210 | cur_line++; | |
211 | cur_line_no++; | |
c906108c | 212 | } |
62f29fda TT |
213 | TUI_SRC_WIN->generic.content_size = nlines; |
214 | ret = TUI_SUCCESS; | |
c906108c SS |
215 | } |
216 | } | |
217 | } | |
218 | return ret; | |
98427f35 | 219 | } |
c906108c SS |
220 | |
221 | ||
1cc6d956 | 222 | /* elz: This function sets the contents of the source window to empty |
c906108c | 223 | except for a line in the middle with a warning message about the |
1cc6d956 | 224 | source not being available. This function is called by |
6ba8e26f AC |
225 | tui_erase_source_contents(), which in turn is invoked when the |
226 | source files cannot be accessed. */ | |
c906108c SS |
227 | |
228 | void | |
08ef48c5 | 229 | tui_set_source_content_nil (struct tui_win_info *win_info, |
a121b7c1 | 230 | const char *warning_string) |
c906108c | 231 | { |
6ba8e26f AC |
232 | int line_width; |
233 | int n_lines; | |
c906108c SS |
234 | int curr_line = 0; |
235 | ||
6ba8e26f AC |
236 | line_width = win_info->generic.width - 1; |
237 | n_lines = win_info->generic.height - 2; | |
c906108c | 238 | |
1cc6d956 MS |
239 | /* Set to empty each line in the window, except for the one which |
240 | contains the message. */ | |
6ba8e26f | 241 | while (curr_line < win_info->generic.content_size) |
c906108c | 242 | { |
1cc6d956 MS |
243 | /* Set the information related to each displayed line to null: |
244 | i.e. the line number is 0, there is no bp, it is not where | |
245 | the program is stopped. */ | |
c906108c | 246 | |
63ed8182 | 247 | struct tui_win_element *element = win_info->generic.content[curr_line]; |
1c5313c5 | 248 | |
362c05fe AS |
249 | element->which_element.source.line_or_addr.loa = LOA_LINE; |
250 | element->which_element.source.line_or_addr.u.line_no = 0; | |
6d012f14 AC |
251 | element->which_element.source.is_exec_point = FALSE; |
252 | element->which_element.source.has_break = FALSE; | |
c906108c | 253 | |
1cc6d956 | 254 | /* Set the contents of the line to blank. */ |
6d012f14 | 255 | element->which_element.source.line[0] = (char) 0; |
c906108c | 256 | |
1cc6d956 | 257 | /* If the current line is in the middle of the screen, then we |
6ba8e26f AC |
258 | want to display the 'no source available' message in it. |
259 | Note: the 'weird' arithmetic with the line width and height | |
1cc6d956 MS |
260 | comes from the function tui_erase_source_content(). We need |
261 | to keep the screen and the window's actual contents in | |
262 | synch. */ | |
c906108c | 263 | |
6ba8e26f | 264 | if (curr_line == (n_lines / 2 + 1)) |
c906108c | 265 | { |
c906108c SS |
266 | int xpos; |
267 | int warning_length = strlen (warning_string); | |
6ba8e26f | 268 | char *src_line; |
c906108c | 269 | |
6ba8e26f | 270 | if (warning_length >= ((line_width - 1) / 2)) |
c906108c SS |
271 | xpos = 1; |
272 | else | |
6ba8e26f | 273 | xpos = (line_width - 1) / 2 - warning_length; |
c906108c | 274 | |
0c820d67 TT |
275 | src_line = xstrprintf ("%s%s", n_spaces (xpos), warning_string); |
276 | xfree (element->which_element.source.line); | |
277 | element->which_element.source.line = src_line; | |
278 | } | |
c906108c SS |
279 | |
280 | curr_line++; | |
0c820d67 | 281 | } |
98427f35 | 282 | } |
c906108c SS |
283 | |
284 | ||
98427f35 SC |
285 | /* Function to display source in the source window. This function |
286 | initializes the horizontal scroll to 0. */ | |
c906108c | 287 | void |
13274fc3 | 288 | tui_show_symtab_source (struct gdbarch *gdbarch, struct symtab *s, |
08ef48c5 MS |
289 | struct tui_line_or_address line, |
290 | int noerror) | |
c906108c | 291 | { |
6d012f14 | 292 | TUI_SRC_WIN->detail.source_info.horizontal_offset = 0; |
13274fc3 | 293 | tui_update_source_window_as_is (TUI_SRC_WIN, gdbarch, s, line, noerror); |
98427f35 | 294 | } |
c906108c | 295 | |
c906108c | 296 | |
a358af15 AC |
297 | /* Answer whether the source is currently displayed in the source |
298 | window. */ | |
c906108c | 299 | int |
56d397a3 | 300 | tui_source_is_displayed (const char *fullname) |
c906108c | 301 | { |
f629cd75 L |
302 | return (TUI_SRC_WIN != NULL |
303 | && TUI_SRC_WIN->generic.content_in_use | |
63ed8182 PP |
304 | && (filename_cmp (tui_locator_win_info_ptr ()->content[0] |
305 | ->which_element.locator.full_name, | |
56d397a3 | 306 | fullname) == 0)); |
98427f35 | 307 | } |
c906108c SS |
308 | |
309 | ||
98427f35 | 310 | /* Scroll the source forward or backward vertically. */ |
c906108c | 311 | void |
6ba8e26f AC |
312 | tui_vertical_source_scroll (enum tui_scroll_direction scroll_direction, |
313 | int num_to_scroll) | |
c906108c | 314 | { |
6d012f14 | 315 | if (TUI_SRC_WIN->generic.content != NULL) |
c906108c | 316 | { |
362c05fe | 317 | struct tui_line_or_address l; |
c906108c | 318 | struct symtab *s; |
63a33118 | 319 | tui_win_content content = TUI_SRC_WIN->generic.content; |
52575520 | 320 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
c906108c | 321 | |
cafb3438 | 322 | if (cursal.symtab == NULL) |
34248c3a | 323 | s = find_pc_line_symtab (get_frame_pc (get_selected_frame (NULL))); |
c906108c | 324 | else |
52575520 | 325 | s = cursal.symtab; |
c906108c | 326 | |
362c05fe | 327 | l.loa = LOA_LINE; |
6ba8e26f | 328 | if (scroll_direction == FORWARD_SCROLL) |
c906108c | 329 | { |
362c05fe AS |
330 | l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no |
331 | + num_to_scroll; | |
332 | if (l.u.line_no > s->nlines) | |
1cc6d956 MS |
333 | /* line = s->nlines - win_info->generic.content_size + 1; */ |
334 | /* elz: fix for dts 23398. */ | |
9a2b4c1b MS |
335 | l.u.line_no |
336 | = content[0]->which_element.source.line_or_addr.u.line_no; | |
c906108c SS |
337 | } |
338 | else | |
339 | { | |
362c05fe AS |
340 | l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no |
341 | - num_to_scroll; | |
342 | if (l.u.line_no <= 0) | |
343 | l.u.line_no = 1; | |
c906108c | 344 | } |
27229e99 | 345 | |
362c05fe | 346 | print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0); |
c906108c | 347 | } |
98427f35 | 348 | } |