| /* TUI display source window. |
| |
| Copyright (C) 1998-2019 Free Software Foundation, Inc. |
| |
| Contributed by Hewlett-Packard Company. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include <ctype.h> |
| #include "symtab.h" |
| #include "frame.h" |
| #include "breakpoint.h" |
| #include "source.h" |
| #include "objfiles.h" |
| #include "filenames.h" |
| #include "source-cache.h" |
| |
| #include "tui/tui.h" |
| #include "tui/tui-data.h" |
| #include "tui/tui-io.h" |
| #include "tui/tui-stack.h" |
| #include "tui/tui-winsource.h" |
| #include "tui/tui-source.h" |
| #include "gdb_curses.h" |
| |
| /* A helper function for tui_set_source_content that extracts some |
| source text from PTR. LINE_NO is the line number; FIRST_COL is the |
| first column to extract, and LINE_WIDTH is the number of characters |
| to display. Returns a string holding the desired text. */ |
| |
| static std::string |
| copy_source_line (const char **ptr, int line_no, int first_col, |
| int line_width) |
| { |
| const char *lineptr = *ptr; |
| |
| /* Init the line with the line number. */ |
| std::string result = string_printf ("%-6d", line_no); |
| int len = result.size (); |
| len = len - ((len / tui_tab_width) * tui_tab_width); |
| result.append (len, ' '); |
| |
| int column = 0; |
| char c; |
| do |
| { |
| int skip_bytes; |
| |
| c = *lineptr; |
| if (c == '\033' && skip_ansi_escape (lineptr, &skip_bytes)) |
| { |
| /* We always have to preserve escapes. */ |
| result.append (lineptr, lineptr + skip_bytes); |
| lineptr += skip_bytes; |
| continue; |
| } |
| |
| ++lineptr; |
| ++column; |
| |
| auto process_tab = [&] () |
| { |
| int max_tab_len = tui_tab_width; |
| |
| --column; |
| for (int j = column % max_tab_len; |
| j < max_tab_len && column < first_col + line_width; |
| column++, j++) |
| if (column >= first_col) |
| result.push_back (' '); |
| }; |
| |
| /* We have to process all the text in order to pick up all the |
| escapes. */ |
| if (column <= first_col || column > first_col + line_width) |
| { |
| if (c == '\t') |
| process_tab (); |
| continue; |
| } |
| |
| if (c == '\n' || c == '\r' || c == '\0') |
| { |
| /* Nothing. */ |
| } |
| else if (c < 040 && c != '\t') |
| { |
| result.push_back ('^'); |
| result.push_back (c + 0100); |
| } |
| else if (c == 0177) |
| { |
| result.push_back ('^'); |
| result.push_back ('?'); |
| } |
| else if (c == '\t') |
| process_tab (); |
| else |
| result.push_back (c); |
| } |
| while (c != '\0' && c != '\n' && c != '\r'); |
| |
| if (c == '\r' && *lineptr == '\n') |
| ++lineptr; |
| *ptr = lineptr; |
| |
| return result; |
| } |
| |
| /* Function to display source in the source window. */ |
| enum tui_status |
| tui_source_window::set_contents (struct gdbarch *arch, |
| struct symtab *s, |
| struct tui_line_or_address line_or_addr) |
| { |
| gdb_assert (line_or_addr.loa == LOA_LINE); |
| int line_no = line_or_addr.u.line_no; |
| |
| enum tui_status ret = TUI_FAILURE; |
| |
| if (s != NULL) |
| { |
| int line_width, nlines; |
| |
| ret = TUI_SUCCESS; |
| line_width = width - TUI_EXECINFO_SIZE - 1; |
| /* Take hilite (window border) into account, when |
| calculating the number of lines. */ |
| nlines = (line_no + (height - 2)) - line_no; |
| |
| std::string srclines; |
| if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines, |
| &srclines)) |
| ret = TUI_FAILURE; |
| else |
| { |
| int cur_line_no, cur_line; |
| struct tui_locator_window *locator |
| = tui_locator_win_info_ptr (); |
| const char *s_filename = symtab_to_filename_for_display (s); |
| |
| title = s_filename; |
| |
| m_fullname = make_unique_xstrdup (symtab_to_fullname (s)); |
| |
| cur_line = 0; |
| gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s)); |
| start_line_or_addr.loa = LOA_LINE; |
| cur_line_no = start_line_or_addr.u.line_no = line_no; |
| |
| const char *iter = srclines.c_str (); |
| content.resize (nlines); |
| while (cur_line < nlines) |
| { |
| struct tui_source_element *element |
| = &content[cur_line]; |
| |
| std::string text; |
| if (*iter != '\0') |
| text = copy_source_line (&iter, cur_line_no, horizontal_offset, |
| line_width); |
| |
| /* Set whether element is the execution point |
| and whether there is a break point on it. */ |
| element->line_or_addr.loa = LOA_LINE; |
| element->line_or_addr.u.line_no = cur_line_no; |
| element->is_exec_point |
| = (filename_cmp (locator->full_name.c_str (), |
| symtab_to_fullname (s)) == 0 |
| && cur_line_no == locator->line_no); |
| |
| content[cur_line].line = make_unique_xstrdup (text.c_str ()); |
| |
| cur_line++; |
| cur_line_no++; |
| } |
| ret = TUI_SUCCESS; |
| } |
| } |
| return ret; |
| } |
| |
| |
| /* Function to display source in the source window. This function |
| initializes the horizontal scroll to 0. */ |
| void |
| tui_source_window::show_symtab_source (struct gdbarch *gdbarch, |
| struct symtab *s, |
| struct tui_line_or_address line) |
| { |
| horizontal_offset = 0; |
| update_source_window_as_is (gdbarch, s, line); |
| } |
| |
| |
| /* Answer whether the source is currently displayed in the source |
| window. */ |
| bool |
| tui_source_window::showing_source_p (const char *fullname) const |
| { |
| return (!content.empty () |
| && (filename_cmp (tui_locator_win_info_ptr ()->full_name.c_str (), |
| fullname) == 0)); |
| } |
| |
| |
| /* Scroll the source forward or backward vertically. */ |
| void |
| tui_source_window::do_scroll_vertical (int num_to_scroll) |
| { |
| if (!content.empty ()) |
| { |
| struct tui_line_or_address l; |
| struct symtab *s; |
| struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
| |
| if (cursal.symtab == NULL) |
| s = find_pc_line_symtab (get_frame_pc (get_selected_frame (NULL))); |
| else |
| s = cursal.symtab; |
| |
| l.loa = LOA_LINE; |
| l.u.line_no = content[0].line_or_addr.u.line_no |
| + num_to_scroll; |
| const std::vector<off_t> *offsets; |
| if (g_source_cache.get_line_charpos (s, &offsets) |
| && l.u.line_no > offsets->size ()) |
| /* line = s->nlines - win_info->content_size + 1; */ |
| /* elz: fix for dts 23398. */ |
| l.u.line_no = content[0].line_or_addr.u.line_no; |
| if (l.u.line_no <= 0) |
| l.u.line_no = 1; |
| |
| print_source_lines (s, l.u.line_no, l.u.line_no + 1, 0); |
| } |
| } |
| |
| tui_source_window::tui_source_window () |
| : tui_source_window_base (SRC_WIN) |
| { |
| gdb::observers::source_styling_changed.attach |
| (std::bind (&tui_source_window::style_changed, this), |
| m_observable); |
| } |
| |
| tui_source_window::~tui_source_window () |
| { |
| gdb::observers::source_styling_changed.detach (m_observable); |
| } |
| |
| void |
| tui_source_window::style_changed () |
| { |
| if (tui_active && is_visible ()) |
| refill (); |
| } |
| |
| bool |
| tui_source_window::location_matches_p (struct bp_location *loc, int line_no) |
| { |
| return (content[line_no].line_or_addr.loa == LOA_LINE |
| && content[line_no].line_or_addr.u.line_no == loc->line_number |
| && loc->symtab != NULL |
| && filename_cmp (m_fullname.get (), |
| symtab_to_fullname (loc->symtab)) == 0); |
| } |
| |
| /* See tui-source.h. */ |
| |
| bool |
| tui_source_window::line_is_displayed (int line) const |
| { |
| bool is_displayed = false; |
| int threshold = SCROLL_THRESHOLD; |
| int i = 0; |
| while (i < content.size () - threshold && !is_displayed) |
| { |
| is_displayed |
| = (content[i].line_or_addr.loa == LOA_LINE |
| && content[i].line_or_addr.u.line_no == line); |
| i++; |
| } |
| |
| return is_displayed; |
| } |
| |
| void |
| tui_source_window::maybe_update (struct frame_info *fi, symtab_and_line sal, |
| int line_no, CORE_ADDR addr) |
| { |
| int start_line = (line_no - (viewport_height / 2)) + 1; |
| if (start_line <= 0) |
| start_line = 1; |
| |
| bool source_already_displayed = (sal.symtab != 0 |
| && showing_source_p (m_fullname.get ())); |
| |
| struct tui_line_or_address l; |
| |
| l.loa = LOA_LINE; |
| l.u.line_no = start_line; |
| if (!(source_already_displayed |
| && line_is_displayed (line_no))) |
| update_source_window (get_frame_arch (fi), sal.symtab, l); |
| else |
| { |
| l.u.line_no = line_no; |
| set_is_exec_point_at (l); |
| } |
| } |