mirror of
https://gitlab.gnome.org/GNOME/gitg
synced 2024-10-02 14:13:48 +00:00
333 lines
8.1 KiB
Vala
333 lines
8.1 KiB
Vala
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namespace GitgGtk
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{
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public class LabelRenderer
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{
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private static const int margin = 3;
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private static const int padding = 4;
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private static string label_text(Gitg.Ref r)
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{
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var escaped = Markup.escape_text(r.parsed_name.shortname);
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return "<span size='smaller'>%s</span>".printf(escaped);
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}
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private static int get_label_width(Pango.Layout layout,
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Gitg.Ref r)
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{
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var smaller = label_text(r);
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int w;
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layout.set_markup(smaller, -1);
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layout.get_pixel_size(out w, null);
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return w + padding * 2;
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}
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public static int width(Gtk.Widget widget,
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Pango.FontDescription *font,
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SList<Gitg.Ref> labels)
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{
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if (labels == null)
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{
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return 0;
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}
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int ret = 0;
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var ctx = widget.get_pango_context();
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var layout = new Pango.Layout(ctx);
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layout.set_font_description(font);
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foreach (Gitg.Ref r in labels)
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{
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ret += get_label_width(layout, r) + margin;
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}
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return ret + margin;
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}
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private static void
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rounded_rectangle(Cairo.Context context,
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double x,
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double y,
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double width,
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double height,
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double radius)
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{
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context.move_to(x + radius, y);
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context.rel_line_to(width - 2 * radius, 0);
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context.arc(x + width - radius, y + radius, radius, 1.5 * Math.PI, 0.0);
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context.rel_line_to(0, height - 2 * radius);
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context.arc(x + width - radius, y + height - radius, radius, 0.0, 0.5 * Math.PI);
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context.rel_line_to(-(width - radius * 2), 0);
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context.arc(x + radius, y + height - radius, radius, 0.5 * Math.PI, Math.PI);
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context.rel_line_to(0, -(height - radius * 2));
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context.arc(x + radius, y + radius, radius, Math.PI, 1.5 * Math.PI);
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}
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private static void get_type_color(Gitg.RefType type,
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out double r,
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out double g,
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out double b)
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{
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switch (type)
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{
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case Gitg.RefType.NONE:
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r = 1;
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g = 1;
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b = 0.8;
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break;
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case Gitg.RefType.BRANCH:
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r = 0.8;
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g = 1;
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b = 0.5;
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break;
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case Gitg.RefType.REMOTE:
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r = 0.5;
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g = 0.8;
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b = 1;
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break;
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case Gitg.RefType.TAG:
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r = 1;
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g = 1;
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b = 0;
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break;
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case Gitg.RefType.STASH:
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r = 1;
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g = 0.8;
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b = 0.5;
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break;
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default:
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r = 1;
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g = 1;
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b = 1;
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break;
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}
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}
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private static void get_ref_color(Gitg.Ref rref,
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out double r,
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out double g,
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out double b)
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{
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if (rref.working)
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{
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r = 1;
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g = 0.7;
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b = 0;
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}
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else
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{
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get_type_color(rref.parsed_name.rtype, out r, out g, out b);
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}
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}
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private static void set_source_for_ref_type(Cairo.Context context,
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Gitg.Ref rref,
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bool use_state)
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{
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if (use_state)
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{
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switch (rref.state)
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{
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case Gitg.RefState.SELECTED:
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context.set_source_rgb(1, 1, 1);
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return;
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case Gitg.RefState.PRELIGHT:
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{
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double r, g, b;
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get_ref_color(rref, out r, out g, out b);
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context.set_source_rgba(r, g, b, 0.3);
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return;
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}
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}
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}
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double r, g, b;
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get_ref_color(rref, out r, out g, out b);
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context.set_source_rgb(r, g, b);
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}
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private static int render_label(Cairo.Context context,
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Pango.Layout layout,
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Gitg.Ref r,
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int x,
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int y,
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int height,
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bool use_state)
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{
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var smaller = label_text(r);
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layout.set_markup(smaller, -1);
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int w;
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int h;
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layout.get_pixel_size(out w, out h);
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rounded_rectangle(context,
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x + 0.5,
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y + margin + 0.5,
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w + padding * 2,
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height - margin * 2,
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5);
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set_source_for_ref_type(context, r, use_state);
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context.fill_preserve();
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context.set_source_rgb(0, 0, 0);
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context.stroke();
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context.save();
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context.translate(x + padding, y + (height - h) / 2.0 + 0.5);
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Pango.cairo_show_layout(context, layout);
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context.restore();
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return w;
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}
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public static void draw(Gtk.Widget widget,
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Pango.FontDescription font,
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Cairo.Context context,
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SList<Gitg.Ref> labels,
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Gdk.Rectangle area)
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{
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double pos = margin + 0.5;
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context.save();
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context.set_line_width(1.0);
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var ctx = widget.get_pango_context();
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var layout = new Pango.Layout(ctx);
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layout.set_font_description(font);
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foreach (Gitg.Ref r in labels)
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{
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var w = render_label(context,
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layout,
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r,
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(int)pos,
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area.y,
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area.height,
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true);
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pos += w + padding * 2 + margin;
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}
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context.restore();
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}
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public static Gitg.Ref? get_ref_at_pos(Gtk.Widget widget,
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Pango.FontDescription font,
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SList<Gitg.Ref> labels,
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int x,
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out int hot_x)
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{
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hot_x = 0;
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if (labels == null)
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{
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return null;
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}
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var ctx = widget.get_pango_context();
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var layout = new Pango.Layout(ctx);
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layout.set_font_description(font);
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int start = margin;
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Gitg.Ref? ret = null;
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foreach (Gitg.Ref r in labels)
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{
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int width = get_label_width(layout, r);
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if (x >= start && x <= start + width)
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{
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ret = r;
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hot_x = x - start;
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break;
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}
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start += width + margin;
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}
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return ret;
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}
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private static uchar convert_color_channel(uchar color,
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uchar alpha)
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{
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return (uchar)((alpha != 0) ? (color / (alpha / 255.0)) : 0);
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}
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private static void convert_bgra_to_rgba(uchar[] src,
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uchar[] dst,
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int width,
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int height)
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{
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int i = 0;
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for (int y = 0; y < height; ++y)
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{
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for (int x = 0; x < width; ++x)
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{
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dst[i] = convert_color_channel(src[i + 2], src[i + 3]);
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dst[i + 1] = convert_color_channel(src[i + 1], src[i + 3]);
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dst[i + 2] = convert_color_channel(src[i], src[i + 3]);
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dst[i + 3] = src[i + 3];
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i += 4;
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}
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}
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}
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public static Gdk.Pixbuf render_ref(Gtk.Widget widget,
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Pango.FontDescription font,
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Gitg.Ref r,
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int height,
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int minwidth)
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{
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var ctx = widget.get_pango_context();
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var layout = new Pango.Layout(ctx);
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layout.set_font_description(font);
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int width = int.max(get_label_width(layout, r), minwidth);
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var surface = new Cairo.ImageSurface(Cairo.Format.ARGB32,
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width + 2,
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height + 2);
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var context = new Cairo.Context(surface);
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context.set_line_width(1);
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render_label(context, layout, r, 1, 1, height, false);
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var data = surface.get_data();
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Gdk.Pixbuf ret = new Gdk.Pixbuf(Gdk.Colorspace.RGB,
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true,
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8,
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width + 2,
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height + 2);
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var pixdata = ret.get_pixels();
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convert_bgra_to_rgba(data, pixdata, width + 2, height + 2);
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return ret;
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}
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}
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}
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// vi:ts=4
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