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reactos/rosapps/mc/edit/editdraw.c
Steven Edwards e5c0c7185e Midnight Commander for Win32 
svn path=/trunk/; revision=2456
2001-12-30 10:02:14 +00:00

649 lines
17 KiB
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/* editor text drawing.
Copyright (C) 1996, 1997 the Free Software Foundation
Authors: 1996, 1997 Paul Sheer
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <config.h>
#include "edit.h"
#define MAX_LINE_LEN 1024
#ifndef MIDNIGHT
#include "app_glob.c"
#include "coollocal.h"
#else
#include "../src/mad.h"
#endif
static void status_string (WEdit * edit, char *s, int w, int fill, int font_width)
{
int i;
char t[160]; /* 160 just to be sure */
/* The field lengths just prevents the status line from shortening to much */
sprintf (t, "[%c%c%c%c] %2ld:%3ld+%2ld=%3ld/%3ld - *%-4ld/%4ldb=%3d",
edit->mark1 != edit->mark2 ? 'B' : '-',
edit->modified ? 'M' : '-', edit->macro_i < 0 ? '-' : 'R',
edit->overwrite == 0 ? '-' : 'O',
edit->curs_col / font_width, edit->start_line + 1, edit->curs_row,
edit->curs_line + 1, edit->total_lines + 1, edit->curs1,
edit->last_byte, edit->curs1 < edit->last_byte
? edit_get_byte (edit, edit->curs1) : -1);
sprintf (s, "%.*s", w + 1, t);
i = strlen (s);
s[i] = ' ';
i = w;
do {
if (strchr (" +-*=/:b", s[i])) /* chop off the last word/number */
break;
s[i] = fill;
} while (i--);
s[i] = fill;
s[w] = 0;
}
#ifdef MIDNIGHT
/* how to get as much onto the status line as is numerically possible :) */
void edit_status (WEdit * edit)
{
int w, i, t;
char *s;
w = edit->widget.cols - (edit->have_frame * 2);
s = malloc (w + 15);
if (w < 4)
w = 4;
memset (s, ' ', w);
attrset (SELECTED_COLOR);
if (w > 4) {
widget_move (edit, edit->have_frame, edit->have_frame);
i = w > 24 ? 18 : w - 6;
i = i < 13 ? 13 : i;
sprintf (s, "%s", name_trunc (edit->filename ? edit->filename : "", i));
i += strlen (s);
s[strlen (s)] = ' ';
t = w - 20;
if (t < 0)
t = 0;
status_string (edit, s + 20, t, ' ', 1);
} else {
s[w] = 0;
}
printw ("%.*s", w, s);
attrset (NORMAL_COLOR);
free (s);
}
#else
extern int fixed_font;
void rerender_text (CWidget * wdt);
void edit_status (WEdit * edit)
{
if ((edit->widget->options & EDITOR_NO_TEXT)) {
return;
} else {
int w, i, t;
CWidget *wdt;
char id[33];
char s[160];
w = edit->num_widget_columns - 1;
if (w > 150)
w = 150;
if (w < 0)
w = 0;
memset (s, 0, w);
if (w > 1) {
i = w > 24 ? 18 : w - 6;
i = i < 13 ? 13 : i;
sprintf (s, "%s", name_trunc (edit->filename ? edit->filename : "", i));
i = strlen (s);
s[i] = ' ';
s[i+1] = ' ';
t = w - i - 2;
if (t < 0)
t = 0;
status_string (edit, s + i + 2, t, 0, FONT_MEAN_WIDTH);
}
s[w] = 0;
strcpy (id, edit->widget->ident);
strcat (id, ".text");
wdt = CIdent (id);
free (wdt->text);
wdt->text = strdup (s);
CSetWidgetSize (id, edit->widget->width, wdt->height);
rerender_text (wdt);
}
}
#endif
/* boolean */
int cursor_in_screen (WEdit * edit, long row)
{
if (row < 0 || row >= edit->num_widget_lines)
return 0;
else
return 1;
}
/* returns rows from the first displayed line to the cursor */
int cursor_from_display_top (WEdit * edit)
{
if (edit->curs1 < edit->start_display)
return -edit_move_forward (edit, edit->curs1, 0, edit->start_display);
else
return edit_move_forward (edit, edit->start_display, 0, edit->curs1);
}
/* returns how far the cursor is out of the screen */
int cursor_out_of_screen (WEdit * edit)
{
int row = cursor_from_display_top (edit);
if (row >= edit->num_widget_lines)
return row - edit->num_widget_lines + 1;
if (row < 0)
return row;
return 0;
}
#ifndef MIDNIGHT
extern unsigned char per_char[256];
int edit_width_of_long_printable (int c);
#endif
/* this scrolls the text so that cursor is on the screen */
void edit_scroll_screen_over_cursor (WEdit * edit)
{
int p, l;
int outby;
p = edit_get_col (edit);
edit_update_curs_row (edit);
#ifdef MIDNIGHT
outby = p + edit->start_col - edit->num_widget_columns + 1 + (EDIT_RIGHT_EXTREME + edit->found_len);
#else
outby = p + edit->start_col - edit->widget->width + 7 + (EDIT_RIGHT_EXTREME + edit->found_len) * FONT_MEAN_WIDTH + edit_width_of_long_printable (edit_get_byte (edit, edit->curs1));
#endif
if (outby > 0)
edit_scroll_right (edit, outby);
#ifdef MIDNIGHT
outby = EDIT_LEFT_EXTREME - p - edit->start_col;
#else
outby = EDIT_LEFT_EXTREME * FONT_MEAN_WIDTH - p - edit->start_col;
#endif
if (outby > 0)
edit_scroll_left (edit, outby);
p = edit->curs_row;
l = 0;
if (edit->found_len != 0)
l = edit->num_widget_lines / 5;
outby = p - edit->num_widget_lines + 1 + EDIT_BOTTOM_EXTREME + l;
if (outby > 0)
edit_scroll_downward (edit, outby);
outby = EDIT_TOP_EXTREME - p + l;
if (outby > 0)
edit_scroll_upward (edit, outby);
edit_update_curs_row (edit);
}
#ifndef MIDNIGHT
#define CACHE_WIDTH 256
#define CACHE_HEIGHT 128
int EditExposeRedraw = 0;
int EditClear = 0;
/* background colors: marked is refers to mouse highlighting, highlighted refers to a found string. */
unsigned long edit_abnormal_color, edit_marked_abnormal_color;
unsigned long edit_highlighted_color, edit_marked_color;
unsigned long edit_normal_background_color;
/* foreground colors */
unsigned long edit_normal_foreground_color, edit_bold_color;
unsigned long edit_italic_color;
/* cursor color */
unsigned long edit_cursor_color;
void edit_set_foreground_colors (unsigned long normal, unsigned long bold, unsigned long italic)
{
edit_normal_foreground_color = normal;
edit_bold_color = bold;
edit_italic_color = italic;
}
void edit_set_background_colors (unsigned long normal, unsigned long abnormal, unsigned long marked, unsigned long marked_abnormal, unsigned long highlighted)
{
edit_abnormal_color = abnormal;
edit_marked_abnormal_color = marked_abnormal;
edit_marked_color = marked;
edit_highlighted_color = highlighted;
edit_normal_background_color = normal;
}
void edit_set_cursor_color (unsigned long c)
{
edit_cursor_color = c;
}
#else
#define BOLD_COLOR MARKED_COLOR
#define UNDERLINE_COLOR VIEW_UNDERLINED_COLOR
#define MARK_COLOR SELECTED_COLOR
#define DEF_COLOR NORMAL_COLOR
static void set_color (int font)
{
attrset (font);
}
#define edit_move(x,y) widget_move(edit, y, x);
static void print_to_widget (WEdit * edit, long row, int start_col, float start_col_real, long end_col, unsigned int line[])
{
int x = (float) start_col_real + EDIT_TEXT_HORIZONTAL_OFFSET;
int x1 = start_col + EDIT_TEXT_HORIZONTAL_OFFSET;
int y = row + EDIT_TEXT_VERTICAL_OFFSET;
set_color (DEF_COLOR);
edit_move (x1, y);
hline (' ', end_col + 1 - EDIT_TEXT_HORIZONTAL_OFFSET - x1);
edit_move (x + FONT_OFFSET_X, y + FONT_OFFSET_Y);
{
unsigned int *p = line;
int textchar = ' ';
long style;
while (*p) {
style = *p >> 8;
textchar = *p & 0xFF;
#ifdef HAVE_SYNTAXH
if (!(style & (0xFF - MOD_ABNORMAL - MOD_CURSOR)))
SLsmg_set_color ((*p & 0x007F0000) >> 16);
#endif
if (style & MOD_ABNORMAL)
textchar = '.';
if (style & MOD_HIGHLIGHTED) {
set_color (BOLD_COLOR);
} else if (style & MOD_MARKED) {
set_color (MARK_COLOR);
}
if (style & MOD_UNDERLINED) {
set_color (UNDERLINE_COLOR);
}
if (style & MOD_BOLD) {
set_color (BOLD_COLOR);
}
addch (textchar);
p++;
}
}
}
/* b pointer to begining of line */
static void edit_draw_this_line (WEdit * edit, long b, long row, long start_col, long end_col)
{
static unsigned int line[MAX_LINE_LEN];
unsigned int *p = line;
long m1 = 0, m2 = 0, q;
int col, start_col_real;
unsigned int c;
int fg, bg;
int i;
edit_get_syntax_color (edit, b - 1, &fg, &bg);
q = edit_move_forward3 (edit, b, start_col - edit->start_col, 0);
start_col_real = (col = (int) edit_move_forward3 (edit, b, 0, q)) + edit->start_col;
if (col + 16 > -edit->start_col) {
eval_marks (edit, &m1, &m2);
if (row <= edit->total_lines - edit->start_line) {
while (col <= end_col - edit->start_col) {
*p = 0;
if (q == edit->curs1)
*p |= MOD_CURSOR * 256;
if (q >= m1 && q < m2)
*p |= MOD_MARKED * 256;
if (q == edit->bracket)
*p |= MOD_BOLD * 256;
if (q >= edit->found_start && q < edit->found_start + edit->found_len)
*p |= MOD_HIGHLIGHTED * 256;
c = edit_get_byte (edit, q);
edit_get_syntax_color (edit, q, &fg, &bg);
/* we don't use bg for mc - fg contains both */
*p |= fg << 16;
q++;
switch (c) {
case '\n':
col = end_col - edit->start_col + 1; /* quit */
*(p++) |= ' ';
break;
case '\t':
i = TAB_SIZE - ((int) col % TAB_SIZE);
*p |= ' ';
c = *(p++) & (0xFFFFFFFF - MOD_CURSOR * 256);
col += i;
while (--i)
*(p++) = c;
break;
case '\r':
break;
default:
if (is_printable (c)) {
*(p++) |= c;
} else {
*(p++) = '.';
*p |= (256 * MOD_ABNORMAL);
}
col++;
break;
}
}
}
} else {
start_col_real = start_col = 0;
}
*p = 0;
print_to_widget (edit, row, start_col, start_col_real, end_col, line);
}
#endif
#ifdef MIDNIGHT
#define key_pending(x) (!is_idle())
#else
int edit_mouse_pending (Window win);
#define edit_draw_this_line edit_draw_this_line_proportional
static int key_pending (WEdit * edit)
{
if (!(edit->force & REDRAW_COMPLETELY) && !EditExposeRedraw)
return CKeyPending ();
return 0;
}
#endif
/* b for pointer to begining of line */
static void edit_draw_this_char (WEdit * edit, long curs, long row)
{
int b = edit_bol (edit, curs);
#ifdef MIDNIGHT
edit_draw_this_line (edit, b, row, 0, edit->num_widget_columns - 1);
#else
edit_draw_this_line (edit, b, row, 0, edit->widget->width);
#endif
}
/* cursor must be in screen for other than REDRAW_PAGE passed in force */
void render_edit_text (WEdit * edit, long start_row, long start_column, long end_row, long end_column)
{
long row = 0, curs_row;
static int prev_curs_row = 0;
static long prev_start_display = 0;
static int prev_start_col = 0;
static long prev_curs = 0;
#ifndef MIDNIGHT
static Window prev_win = 0;
#endif
int fg, bg;
int force = edit->force;
long b;
/*
if the position of the page has not moved then we can draw the cursor character only.
This will prevent line flicker when using arrow keys.
*/
if ((!(force & REDRAW_CHAR_ONLY)) || (force & REDRAW_PAGE)
#ifndef MIDNIGHT
|| prev_win != edit->widget->winid
#endif
) {
if (!(force & REDRAW_IN_BOUNDS)) { /* !REDRAW_IN_BOUNDS means to ignore bounds and redraw whole rows */
start_row = 0;
end_row = edit->num_widget_lines - 1;
start_column = 0;
#ifdef MIDNIGHT
end_column = edit->num_widget_columns - 1;
#else
end_column = edit->widget->width;
#endif
}
if (force & REDRAW_PAGE) {
row = start_row;
b = edit_move_forward (edit, edit->start_display, start_row, 0);
while (row <= end_row) {
if (key_pending (edit))
goto exit_render;
edit_draw_this_line (edit, b, row, start_column, end_column);
b = edit_move_forward (edit, b, 1, 0);
row++;
}
} else {
curs_row = edit->curs_row;
if (force & REDRAW_BEFORE_CURSOR) {
if (start_row < curs_row) {
long upto = curs_row - 1 <= end_row ? curs_row - 1 : end_row;
row = start_row;
b = edit->start_display;
while (row <= upto) {
if (key_pending (edit))
goto exit_render;
edit_draw_this_line (edit, b, row, start_column, end_column);
b = edit_move_forward (edit, b, 1, 0);
}
}
}
/* if (force & REDRAW_LINE) { ---> default */
b = edit_bol (edit, edit->curs1);
if (curs_row >= start_row && curs_row <= end_row) {
if (key_pending (edit))
goto exit_render;
edit_draw_this_line (edit, b, curs_row, start_column, end_column);
}
if (force & REDRAW_AFTER_CURSOR) {
if (end_row > curs_row) {
row = curs_row + 1 < start_row ? start_row : curs_row + 1;
b = edit_move_forward (edit, b, 1, 0);
while (row <= end_row) {
if (key_pending (edit))
goto exit_render;
edit_draw_this_line (edit, b, row, start_column, end_column);
b = edit_move_forward (edit, b, 1, 0);
row++;
}
}
}
if (force & REDRAW_LINE_ABOVE && curs_row >= 1) {
row = curs_row - 1;
b = edit_move_backward (edit, edit_bol (edit, edit->curs1), 1);
if (row >= start_row && row <= end_row) {
if (key_pending (edit))
goto exit_render;
edit_draw_this_line (edit, b, row, start_column, end_column);
}
}
if (force & REDRAW_LINE_BELOW && row < edit->num_widget_lines - 1) {
row = curs_row + 1;
b = edit_bol (edit, edit->curs1);
b = edit_move_forward (edit, b, 1, 0);
if (row >= start_row && row <= end_row) {
if (key_pending (edit))
goto exit_render;
edit_draw_this_line (edit, b, row, start_column, end_column);
}
}
}
} else {
if (prev_curs_row < edit->curs_row) { /* with the new text highlighting, we must draw from the top down */
edit_draw_this_char (edit, prev_curs, prev_curs_row);
edit_draw_this_char (edit, edit->curs1, edit->curs_row);
} else {
edit_draw_this_char (edit, edit->curs1, edit->curs_row);
edit_draw_this_char (edit, prev_curs, prev_curs_row);
}
}
edit->force = 0;
prev_curs_row = edit->curs_row;
prev_curs = edit->curs1;
prev_start_display = edit->start_display;
prev_start_col = edit->start_col;
#ifndef MIDNIGHT
prev_win = edit->widget->winid;
#endif
exit_render:
edit_get_syntax_color (edit, edit->start_display - 1, &fg, &bg);
}
#ifndef MIDNIGHT
void edit_convert_expose_to_area (XExposeEvent * xexpose, int *row1, int *col1, int *row2, int *col2)
{
*col1 = xexpose->x - EDIT_TEXT_HORIZONTAL_OFFSET;
*row1 = (xexpose->y - EDIT_TEXT_VERTICAL_OFFSET) / FONT_PIX_PER_LINE;
*col2 = xexpose->x + xexpose->width + EDIT_TEXT_HORIZONTAL_OFFSET + 3;
*row2 = (xexpose->y + xexpose->height - EDIT_TEXT_VERTICAL_OFFSET) / FONT_PIX_PER_LINE;
}
void edit_render_tidbits (CWidget * wdt)
{
int isfocussed;
int w = wdt->width, h = wdt->height;
Window win;
win = wdt->winid;
isfocussed = (win == CGetFocus ());
CSetColor (COLOR_FLAT);
if (isfocussed) {
render_bevel (win, 0, 0, w - 1, h - 1, 3, 1); /*most outer border bevel */
} else {
render_bevel (win, 2, 2, w - 3, h - 3, 1, 1); /*border bevel */
render_bevel (win, 0, 0, w - 1, h - 1, 2, 0); /*most outer border bevel */
}
}
void edit_set_space_width (int s);
extern int option_long_whitespace;
#endif
void edit_render (WEdit * edit, int page, int row_start, int col_start, int row_end, int col_end)
{
int f = 0;
if (page) /* if it was an expose event, 'page' would be set */
edit->force |= REDRAW_PAGE | REDRAW_IN_BOUNDS;
f = edit->force & (REDRAW_PAGE | REDRAW_COMPLETELY);
#ifdef MIDNIGHT
if (edit->force & REDRAW_COMPLETELY)
redraw_labels (edit->widget.parent, (Widget *) edit);
#else
if (option_long_whitespace)
edit_set_space_width (per_char[' '] * 2);
else
edit_set_space_width (per_char[' ']);
edit_set_foreground_colors (
color_palette (option_editor_fg_normal),
color_palette (option_editor_fg_bold),
color_palette (option_editor_fg_italic)
);
edit_set_background_colors (
color_palette (option_editor_bg_normal),
color_palette (option_editor_bg_abnormal),
color_palette (option_editor_bg_marked),
color_palette (option_editor_bg_marked_abnormal),
color_palette (option_editor_bg_highlighted)
);
edit_set_cursor_color (
color_palette (option_editor_fg_cursor)
);
if (!EditExposeRedraw)
set_cursor_position (0, 0, 0, 0, 0, 0, 0, 0, 0);
#endif
render_edit_text (edit, row_start, col_start, row_end, col_end);
if (edit->force) /* edit->force != 0 means a key was pending and the redraw
was halted, so next time we must redraw everything in case stuff
was left undrawn from a previous key press */
edit->force |= REDRAW_PAGE;
#ifndef MIDNIGHT
if (f) {
edit_render_tidbits (edit->widget);
CSetColor (edit_normal_background_color);
CLine (edit->widget->winid, 3, 3, 3, edit->widget->height - 4);
}
#endif
}
#ifndef MIDNIGHT
void edit_render_expose (WEdit * edit, XExposeEvent * xexpose)
{
int row_start, col_start, row_end, col_end;
EditExposeRedraw = 1;
edit->num_widget_lines = (edit->widget->height - 6) / FONT_PIX_PER_LINE;
edit->num_widget_columns = (edit->widget->width - 7) / FONT_MEAN_WIDTH;
if (edit->force & (REDRAW_PAGE | REDRAW_COMPLETELY)) {
edit->force |= REDRAW_PAGE | REDRAW_COMPLETELY;
edit_render_keypress (edit);
} else {
edit_convert_expose_to_area (xexpose, &row_start, &col_start, &row_end, &col_end);
edit_render (edit, 1, row_start, col_start, row_end, col_end);
}
EditExposeRedraw = 0;
}
void edit_render_keypress (WEdit * edit)
{
edit_render (edit, 0, 0, 0, 0, 0);
}
#else
void edit_render_keypress (WEdit * edit)
{
edit_render (edit, 0, 0, 0, 0, 0);
}
#endif
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