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/* TUI display source window.
Copyright (C) 1998-2020 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 <math.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-win.h"
#include "tui/tui-winsource.h"
#include "tui/tui-source.h"
#include "gdb_curses.h"
/* Function to display source in the source window. */
bool
tui_source_window::set_contents (struct gdbarch *arch,
const struct symtab_and_line &sal)
{
struct symtab *s = sal.symtab;
int line_no = sal.line;
if (s == NULL)
return false;
int line_width, nlines;
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;
const std::vector<off_t> *offsets;
if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines,
&srclines)
|| !g_source_cache.get_line_charpos (s, &offsets))
return false;
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;
int digits = 0;
if (compact_source)
{
/* Solaris 11+gcc 5.5 has ambiguous overloads of log10, so we
cast to double to get the right one. */
double l = log10 ((double) offsets->size ());
digits = 1 + (int) l;
}
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 = tui_copy_source_line (&iter, cur_line_no,
horizontal_offset,
line_width, digits);
/* 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 = std::move (text);
cur_line++;
cur_line_no++;
}
return true;
}
/* 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 = start_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 ())
l.u.line_no = start_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);
}
}
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 start_line = (sal.line - ((height - 2) / 2)) + 1;
if (start_line <= 0)
start_line = 1;
bool source_already_displayed = (sal.symtab != 0
&& showing_source_p (m_fullname.get ()));
if (!(source_already_displayed && line_is_displayed (sal.line)))
{
sal.line = start_line;
update_source_window (get_frame_arch (fi), sal);
}
else
{
struct tui_line_or_address l;
l.loa = LOA_LINE;
l.u.line_no = sal.line;
set_is_exec_point_at (l);
}
}
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