editdraw.c

来自「ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机」· C语言 代码 · 共 649 行 · 第 1/2 页

	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