editdraw.c

具有IDE功能的编辑器

	    while (col <= end_col - edit->start_col) {
		*p = 0;
		if (q == edit->curs1)
		    *p |= MOD_CURSOR * 256;
		if (q >= m1 && q < m2) {
		    if (column_highlighting) {
			int x;
			x = edit_move_forward3 (edit, b, 0, q);
			if (x >= c1 && x < c2)
			    *p |= MOD_MARKED * 256;
		    } else
			*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);
/* we don't use bg for mc - fg contains both */
		if (book_mark == -1) {
		    edit_get_syntax_color (edit, q, &fg, &bg);
		    *p |= fg << 16;
		} else {
		    *p |= book_mark << 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

#define edit_draw_this_line edit_draw_this_line_proportional

int option_smooth_scrolling = 0;

static int key_pending (WEdit * edit)
{
    static int flush = 0, line = 0;
#ifdef GTK
    /* ******* */
#else
    if (!edit) {
	flush = line = 0;
    } else if (!(edit->force & REDRAW_COMPLETELY) && !EditExposeRedraw && !option_smooth_scrolling) {
/* this flushes the display in logarithmic intervals - so both fast and
   slow machines will get good performance vs nice-refreshing */
	if ((1 << flush) == ++line) {
	    flush++;
	    return CKeyPending ();
	}
    }
#endif
    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, CWidthOf (edit->widget));
#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 int prev_start_col = 0;
    static long prev_curs = 0;
    static long prev_start = -1;

#ifndef MIDNIGHT
    static unsigned long prev_win = 0;
#endif

    int force = edit->force;
    long b;

    CPushFont ("editor", 0);

#ifndef MIDNIGHT
    key_pending (0);
#endif

/*
   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
#ifdef GTK
	|| prev_win != ((GdkWindowPrivate *) CWindowOf (edit->widget)->text_area)->xwindow
#else
	|| prev_win != CWindowOf (edit->widget)
#endif
#endif
	) {
	int time_division = 5;
#if 0
	if (CPending ())
	    time_division--;
#endif
#ifndef MIDNIGHT
	if (prev_start < 0)
	    prev_start = edit->start_line;
	if (option_smooth_scrolling && prev_win == CWindowOf (edit->widget) && !edit->screen_modified) {
	    int i, t;
	    int pos1, pos2;
	    i = edit->start_line - prev_start;
	    if (i <= time_division && i > 0) {
		edit_draw_proportional (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
		for (pos2 = 0, t = 0; t < time_division; t++) {
		    int move;
		    pos1 = FONT_PIX_PER_LINE * i * (t + 1) / time_division;
		    move = pos1 - pos2;
		    pos2 += move;
		    XCopyArea (CDisplay, edit->widget->winid, edit->widget->winid, CGC,
			       EDIT_TEXT_HORIZONTAL_OFFSET,
			       EDIT_TEXT_VERTICAL_OFFSET + move,
			       edit->widget->width - EDIT_FRAME_W,
			       edit->widget->height - EDIT_FRAME_H - move,
			       EDIT_TEXT_HORIZONTAL_OFFSET, EDIT_TEXT_VERTICAL_OFFSET);
		    XClearArea (CDisplay, edit->widget->winid, EDIT_TEXT_HORIZONTAL_OFFSET,
				edit->widget->height - EDIT_FRAME_H +
				EDIT_TEXT_VERTICAL_OFFSET - move,
				edit->widget->width - EDIT_FRAME_W, move, 0);
		    XFlush (CDisplay);
		    pause ();
		}
	    } else if (i >= -time_division && i < 0) {
		edit_draw_proportional (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
		i = -i;
		for (pos2 = 0, t = 0; t < time_division; t++) {
		    int move;
		    pos1 = FONT_PIX_PER_LINE * i * (t + 1) / time_division;
		    move = pos1 - pos2;
		    pos2 += move;
		    XCopyArea (CDisplay, edit->widget->winid, edit->widget->winid, CGC,
			       EDIT_TEXT_HORIZONTAL_OFFSET, EDIT_TEXT_VERTICAL_OFFSET,
			       edit->widget->width - EDIT_FRAME_W,
			       edit->widget->height - EDIT_FRAME_H -
			       move, EDIT_TEXT_HORIZONTAL_OFFSET, EDIT_TEXT_VERTICAL_OFFSET + move);
		    XClearArea (CDisplay, edit->widget->winid, EDIT_TEXT_HORIZONTAL_OFFSET,
				EDIT_TEXT_VERTICAL_OFFSET,
				edit->widget->width - EDIT_FRAME_W, move, 0);
		    XFlush (CDisplay);
		    pause ();
		}
	    }
	}
#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 = CWidthOf (edit->widget);
#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_col = edit->start_col;
#ifndef MIDNIGHT
#ifdef GTK
    prev_win = ((GdkWindowPrivate *) CWindowOf (edit->widget)->text_area)->xwindow;
#else
    prev_win = CWindowOf (edit->widget);
#endif
#endif
  exit_render:
    edit->screen_modified = 0;
    prev_start = edit->start_line;
    CPopFont ();
    return;
}



#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;
}

#ifdef GTK

void edit_render_tidbits (GtkEdit * edit)
{
    gtk_widget_draw_focus (GTK_WIDGET (edit));
}

#else

void edit_render_tidbits (CWidget * wdt)
{
    (*look->edit_render_tidbits) (wdt);
}

#endif

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 (row_start < 0)
	row_start = 0;
    if (row_end < row_start)
	return;
    if (col_start < 0)
	col_start = 0;
    if (col_end < col_start)
	return;
    if (row_end > edit->num_widget_lines)
	row_end = edit->num_widget_lines;
    if (col_end > edit->widget->width)
	col_end = edit->widget->width;
#ifdef GTK
    GtkEdit *win;
#endif
    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 (FONT_PER_CHAR(' ') * 2);
    else
	edit_set_space_width (FONT_PER_CHAR(' '));
#ifdef GTK
    win = (GtkEdit *) edit->widget;
#endif
    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_normal == option_editor_bg_abnormal) ? (option_editor_bg_normal ? 0 : 1) : 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)
	);

#ifdef GTK
    /* *********** */
#else
    if (!EditExposeRedraw)
	set_cursor_position (0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
#endif
#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);
#endif
}

#ifndef MIDNIGHT
void edit_render_expose (WEdit * edit, XExposeEvent * xexpose)
{
    int row_start, col_start, row_end, col_end;
    CPushFont ("editor", 0);
    EditExposeRedraw = 1;
    edit->num_widget_lines = (CHeightOf (edit->widget) - EDIT_FRAME_H) / FONT_PIX_PER_LINE;
    edit->num_widget_columns = (CWidthOf (edit->widget) - EDIT_FRAME_W) / 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);
    }
    CPopFont ();
    EditExposeRedraw = 0;
}

void edit_render_keypress (WEdit * edit)
{
    CPushFont ("editor", 0);
    edit_render (edit, 0, 0, 0, 0, 0);
    CPopFont ();
}

#else

void edit_render_keypress (WEdit * edit)
{
    edit_render (edit, 0, 0, 0, 0, 0);
}

#endif