1 /* TUI display source window.
3 Copyright (C) 1998-2019 Free Software Foundation, Inc.
5 Contributed by Hewlett-Packard Company.
7 This file is part of GDB.
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
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
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.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "breakpoint.h"
29 #include "filenames.h"
30 #include "source-cache.h"
33 #include "tui/tui-data.h"
34 #include "tui/tui-io.h"
35 #include "tui/tui-stack.h"
36 #include "tui/tui-winsource.h"
37 #include "tui/tui-source.h"
38 #include "gdb_curses.h"
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. */
46 copy_source_line (const char **ptr, int line_no, int first_col,
49 const char *lineptr = *ptr;
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, ' ');
64 if (c == '\033' && skip_ansi_escape (lineptr, &skip_bytes))
66 /* We always have to preserve escapes. */
67 result.append (lineptr, lineptr + skip_bytes);
68 lineptr += skip_bytes;
75 auto process_tab = [&] ()
77 int max_tab_len = tui_tab_width;
80 for (int j = column % max_tab_len;
81 j < max_tab_len && column < first_col + line_width;
83 if (column >= first_col)
84 result.push_back (' ');
87 /* We have to process all the text in order to pick up all the
89 if (column <= first_col || column > first_col + line_width)
96 if (c == '\n' || c == '\r' || c == '\0')
100 else if (c < 040 && c != '\t')
102 result.push_back ('^');
103 result.push_back (c + 0100);
107 result.push_back ('^');
108 result.push_back ('?');
113 result.push_back (c);
115 while (c != '\0' && c != '\n' && c != '\r');
117 if (c == '\r' && *lineptr == '\n')
124 /* Function to display source in the source window. */
126 tui_set_source_content (tui_source_window_base *win_info,
131 enum tui_status ret = TUI_FAILURE;
135 int line_width, nlines;
138 tui_alloc_source_buffer (win_info);
139 line_width = win_info->width - 1;
140 /* Take hilite (window border) into account, when
141 calculating the number of lines. */
142 nlines = (line_no + (win_info->height - 2)) - line_no;
144 std::string srclines;
145 if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines,
150 const char *filename = symtab_to_filename_for_display (s);
151 char *name = (char *) alloca (strlen (filename) + 100);
153 sprintf (name, "%s:%d", filename, line_no);
154 print_sys_errmsg (name, errno);
160 int cur_line_no, cur_line;
161 struct tui_locator_window *locator
162 = tui_locator_win_info_ptr ();
163 const char *s_filename = symtab_to_filename_for_display (s);
165 xfree (win_info->title);
166 win_info->title = xstrdup (s_filename);
168 xfree (win_info->fullname);
169 win_info->fullname = xstrdup (symtab_to_fullname (s));
172 win_info->gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s));
173 win_info->start_line_or_addr.loa = LOA_LINE;
174 cur_line_no = win_info->start_line_or_addr.u.line_no = line_no;
176 const char *iter = srclines.c_str ();
177 win_info->content.resize (nlines);
178 while (cur_line < nlines)
180 struct tui_source_element *element
181 = &win_info->content[cur_line];
185 text = copy_source_line (&iter, cur_line_no,
186 win_info->horizontal_offset,
189 /* Set whether element is the execution point
190 and whether there is a break point on it. */
191 element->line_or_addr.loa = LOA_LINE;
192 element->line_or_addr.u.line_no = cur_line_no;
193 element->is_exec_point
194 = (filename_cmp (locator->full_name,
195 symtab_to_fullname (s)) == 0
196 && cur_line_no == locator->line_no);
198 xfree (win_info->content[cur_line].line);
199 win_info->content[cur_line].line
200 = xstrdup (text.c_str ());
212 /* Function to display source in the source window. This function
213 initializes the horizontal scroll to 0. */
215 tui_show_symtab_source (tui_source_window_base *win_info,
216 struct gdbarch *gdbarch, struct symtab *s,
217 struct tui_line_or_address line,
220 win_info->horizontal_offset = 0;
221 tui_update_source_window_as_is (win_info, gdbarch, s, line, noerror);
225 /* Answer whether the source is currently displayed in the source
228 tui_source_window::showing_source_p (const char *fullname) const
230 return (!content.empty ()
231 && (filename_cmp (tui_locator_win_info_ptr ()->full_name,
236 /* Scroll the source forward or backward vertically. */
238 tui_source_window::do_scroll_vertical (int num_to_scroll)
240 if (!content.empty ())
242 struct tui_line_or_address l;
244 struct symtab_and_line cursal = get_current_source_symtab_and_line ();
246 if (cursal.symtab == NULL)
247 s = find_pc_line_symtab (get_frame_pc (get_selected_frame (NULL)));
252 l.u.line_no = content[0].line_or_addr.u.line_no
254 if (l.u.line_no > s->nlines)
255 /* line = s->nlines - win_info->content_size + 1; */
256 /* elz: fix for dts 23398. */
257 l.u.line_no = content[0].line_or_addr.u.line_no;
258 if (l.u.line_no <= 0)
261 print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0);
265 tui_source_window::tui_source_window ()
266 : tui_source_window_base (SRC_WIN)
268 gdb::observers::source_styling_changed.attach
269 (std::bind (&tui_source_window::style_changed, this),
273 tui_source_window::~tui_source_window ()
275 gdb::observers::source_styling_changed.detach (m_observable);
279 tui_source_window::style_changed ()
281 if (tui_active && is_visible)
286 tui_source_window::location_matches_p (struct bp_location *loc, int line_no)
288 return (content[line_no].line_or_addr.loa == LOA_LINE
289 && content[line_no].line_or_addr.u.line_no == loc->line_number
290 && loc->symtab != NULL
291 && filename_cmp (fullname,
292 symtab_to_fullname (loc->symtab)) == 0);
296 tui_source_window_base::reset (enum tui_win_type win_type,
297 int height, int width,
298 int origin_x, int origin_y)
300 tui_gen_win_info::reset (win_type, height, width - 3,
301 origin_x + 3, origin_y);
302 execution_info->reset (EXEC_INFO_WIN, height, 3, origin_x, origin_y);