/* TUI display source window.
- Copyright (C) 1998-2019 Free Software Foundation, Inc.
+ Copyright (C) 1998-2020 Free Software Foundation, Inc.
Contributed by Hewlett-Packard Company.
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 "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"
-/* 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)
+/* Function to display source in the source window. */
+bool
+tui_source_window::set_contents (struct gdbarch *arch,
+ const struct symtab_and_line &sal)
{
- const char *lineptr = *ptr;
+ struct symtab *s = sal.symtab;
+ int line_no = sal.line;
- /* 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, ' ');
+ if (s == NULL)
+ return false;
- int column = 0;
- char c;
- do
- {
- int skip_bytes;
+ int line_width, nlines;
- 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;
- }
+ 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;
- ++lineptr;
- ++column;
+ 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;
- 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;
- }
+ 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);
- 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');
+ title = s_filename;
- if (c == '\r' && *lineptr == '\n')
- ++lineptr;
- *ptr = lineptr;
+ m_fullname = make_unique_xstrdup (symtab_to_fullname (s));
- return result;
-}
+ 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;
-/* Function to display source in the source window. */
-enum tui_status
-tui_set_source_content (struct symtab *s,
- int line_no,
- int noerror)
-{
- enum tui_status ret = TUI_FAILURE;
+ 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;
+ }
- if (s != NULL)
+ const char *iter = srclines.c_str ();
+ content.resize (nlines);
+ while (cur_line < nlines)
{
- int line_width, nlines;
-
- ret = TUI_SUCCESS;
- tui_alloc_source_buffer (TUI_SRC_WIN);
- line_width = TUI_SRC_WIN->width - 1;
- /* Take hilite (window border) into account, when
- calculating the number of lines. */
- nlines = (line_no + (TUI_SRC_WIN->height - 2)) - line_no;
-
- std::string srclines;
- if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines,
- &srclines))
- {
- if (!noerror)
- {
- const char *filename = symtab_to_filename_for_display (s);
- char *name = (char *) alloca (strlen (filename) + 100);
-
- sprintf (name, "%s:%d", filename, line_no);
- print_sys_errmsg (name, errno);
- }
- ret = TUI_FAILURE;
- }
- else
- {
- int cur_line_no, cur_line;
- struct tui_gen_win_info *locator
- = tui_locator_win_info_ptr ();
- struct tui_source_window_base *src
- = (struct tui_source_window_base *) TUI_SRC_WIN;
- const char *s_filename = symtab_to_filename_for_display (s);
-
- if (TUI_SRC_WIN->title)
- xfree (TUI_SRC_WIN->title);
- TUI_SRC_WIN->title = xstrdup (s_filename);
-
- xfree (src->fullname);
- src->fullname = xstrdup (symtab_to_fullname (s));
-
- cur_line = 0;
- src->gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s));
- src->start_line_or_addr.loa = LOA_LINE;
- cur_line_no = src->start_line_or_addr.u.line_no = line_no;
-
- const char *iter = srclines.c_str ();
- while (cur_line < nlines)
- {
- struct tui_win_element *element
- = TUI_SRC_WIN->content[cur_line];
-
- std::string text;
- if (*iter != '\0')
- text = copy_source_line (&iter, cur_line_no,
- src->horizontal_offset,
- line_width);
-
- /* Set whether element is the execution point
- and whether there is a break point on it. */
- element->which_element.source.line_or_addr.loa =
- LOA_LINE;
- element->which_element.source.line_or_addr.u.line_no =
- cur_line_no;
- element->which_element.source.is_exec_point =
- (filename_cmp (locator->content[0]
- ->which_element.locator.full_name,
- symtab_to_fullname (s)) == 0
- && cur_line_no
- == locator->content[0]
- ->which_element.locator.line_no);
-
- xfree (TUI_SRC_WIN->content[cur_line]
- ->which_element.source.line);
- TUI_SRC_WIN->content[cur_line]
- ->which_element.source.line
- = xstrdup (text.c_str ());
-
- cur_line++;
- cur_line_no++;
- }
- TUI_SRC_WIN->content_size = nlines;
- ret = TUI_SUCCESS;
- }
+ 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 ret;
-}
+ return true;
+}
-/* elz: This function sets the contents of the source window to empty
- except for a line in the middle with a warning message about the
- source not being available. This function is called by
- tui_erase_source_contents(), which in turn is invoked when the
- source files cannot be accessed. */
-void
-tui_set_source_content_nil (struct tui_win_info *win_info,
- const char *warning_string)
+/* Answer whether the source is currently displayed in the source
+ window. */
+bool
+tui_source_window::showing_source_p (const char *fullname) const
{
- int line_width;
- int n_lines;
- int curr_line = 0;
+ return (!content.empty ()
+ && (filename_cmp (tui_locator_win_info_ptr ()->full_name.c_str (),
+ fullname) == 0));
+}
- line_width = win_info->width - 1;
- n_lines = win_info->height - 2;
- /* Set to empty each line in the window, except for the one which
- contains the message. */
- while (curr_line < win_info->content_size)
+/* Scroll the source forward or backward vertically. */
+void
+tui_source_window::do_scroll_vertical (int num_to_scroll)
+{
+ if (!content.empty ())
{
- /* Set the information related to each displayed line to null:
- i.e. the line number is 0, there is no bp, it is not where
- the program is stopped. */
-
- struct tui_win_element *element = win_info->content[curr_line];
-
- element->which_element.source.line_or_addr.loa = LOA_LINE;
- element->which_element.source.line_or_addr.u.line_no = 0;
- element->which_element.source.is_exec_point = FALSE;
- element->which_element.source.has_break = FALSE;
-
- /* Set the contents of the line to blank. */
- element->which_element.source.line[0] = (char) 0;
-
- /* If the current line is in the middle of the screen, then we
- want to display the 'no source available' message in it.
- Note: the 'weird' arithmetic with the line width and height
- comes from the function tui_erase_source_content(). We need
- to keep the screen and the window's actual contents in
- synch. */
+ struct symtab *s;
+ struct symtab_and_line cursal = get_current_source_symtab_and_line ();
+ struct gdbarch *arch = gdbarch;
- if (curr_line == (n_lines / 2 + 1))
+ if (cursal.symtab == NULL)
{
- int xpos;
- int warning_length = strlen (warning_string);
- char *src_line;
-
- if (warning_length >= ((line_width - 1) / 2))
- xpos = 1;
- else
- xpos = (line_width - 1) / 2 - warning_length;
-
- src_line = xstrprintf ("%s%s", n_spaces (xpos), warning_string);
- xfree (element->which_element.source.line);
- element->which_element.source.line = src_line;
+ struct frame_info *fi = get_selected_frame (NULL);
+ s = find_pc_line_symtab (get_frame_pc (fi));
+ arch = get_frame_arch (fi);
}
+ else
+ s = cursal.symtab;
- curr_line++;
+ int 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)
+ && line_no > offsets->size ())
+ line_no = start_line_or_addr.u.line_no;
+ if (line_no <= 0)
+ line_no = 1;
+
+ cursal.line = line_no;
+ find_line_pc (cursal.symtab, cursal.line, &cursal.pc);
+ for (struct tui_source_window_base *win_info : tui_source_windows ())
+ win_info->update_source_window_as_is (arch, cursal);
}
}
-
-/* Function to display source in the source window. This function
- initializes the horizontal scroll to 0. */
-void
-tui_show_symtab_source (struct gdbarch *gdbarch, struct symtab *s,
- struct tui_line_or_address line,
- int noerror)
+bool
+tui_source_window::location_matches_p (struct bp_location *loc, int line_no)
{
- TUI_SRC_WIN->horizontal_offset = 0;
- tui_update_source_window_as_is (TUI_SRC_WIN, gdbarch, s, line, noerror);
+ 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. */
-/* Answer whether the source is currently displayed in the source
- window. */
-int
-tui_source_is_displayed (const char *fullname)
+bool
+tui_source_window::line_is_displayed (int line) const
{
- return (TUI_SRC_WIN != NULL
- && TUI_SRC_WIN->content_in_use
- && (filename_cmp (tui_locator_win_info_ptr ()->content[0]
- ->which_element.locator.full_name,
- fullname) == 0));
-}
+ if (content.size () < SCROLL_THRESHOLD)
+ return false;
+ for (size_t i = 0; i < content.size () - SCROLL_THRESHOLD; ++i)
+ {
+ if (content[i].line_or_addr.loa == LOA_LINE
+ && content[i].line_or_addr.u.line_no == line)
+ return true;
+ }
+
+ return false;
+}
-/* Scroll the source forward or backward vertically. */
void
-tui_source_window::do_scroll_vertical
- (enum tui_scroll_direction scroll_direction, int num_to_scroll)
+tui_source_window::maybe_update (struct frame_info *fi, symtab_and_line sal)
{
- if (content != NULL)
+ 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;
- 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;
- if (scroll_direction == FORWARD_SCROLL)
- {
- l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no
- + num_to_scroll;
- if (l.u.line_no > s->nlines)
- /* line = s->nlines - win_info->content_size + 1; */
- /* elz: fix for dts 23398. */
- l.u.line_no
- = content[0]->which_element.source.line_or_addr.u.line_no;
- }
- else
- {
- l.u.line_no = content[0]->which_element.source.line_or_addr.u.line_no
- - num_to_scroll;
- 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);
+ l.u.line_no = sal.line;
+ set_is_exec_point_at (l);
}
}
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