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/* Copyright 2016 Software Freedom Conservancy Inc.
*
* This software is licensed under the GNU LGPL (version 2.1 or later).
* See the COPYING file in this distribution.
*/
private class CheckerboardItemText {
private static int one_line_height = 0;
private string text;
private bool marked_up;
private Pango.Alignment alignment;
private Pango.Layout layout = null;
private bool single_line = true;
private int height = 0;
public Gdk.Rectangle allocation = Gdk.Rectangle();
public CheckerboardItemText(string text, Pango.Alignment alignment = Pango.Alignment.LEFT,
bool marked_up = false) {
this.text = text;
this.marked_up = marked_up;
this.alignment = alignment;
single_line = is_single_line();
}
private bool is_single_line() {
return !String.contains_char(text, '\n');
}
public bool is_marked_up() {
return marked_up;
}
public bool is_set_to(string text, bool marked_up, Pango.Alignment alignment) {
return (this.marked_up == marked_up && this.alignment == alignment && this.text == text);
}
public string get_text() {
return text;
}
public int get_height() {
if (height == 0)
update_height();
return height;
}
public Pango.Layout get_pango_layout(int max_width = 0) {
if (layout == null)
create_pango();
if (max_width > 0)
layout.set_width(max_width * Pango.SCALE);
return layout;
}
public void clear_pango_layout() {
layout = null;
}
private void update_height() {
if (one_line_height != 0 && single_line)
height = one_line_height;
else
create_pango();
}
private void create_pango() {
// create layout for this string and ellipsize so it never extends past its laid-down width
layout = AppWindow.get_instance().create_pango_layout(null);
if (!marked_up)
layout.set_text(text, -1);
else
layout.set_markup(text, -1);
layout.set_ellipsize(Pango.EllipsizeMode.END);
layout.set_alignment(alignment);
// getting pixel size is expensive, and we only need the height, so use cached values
// whenever possible
if (one_line_height != 0 && single_line) {
height = one_line_height;
} else {
int width;
layout.get_pixel_size(out width, out height);
// cache first one-line height discovered
if (one_line_height == 0 && single_line)
one_line_height = height;
}
}
}
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