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using Cairo;
using Gee;
using Gdk;
using Gtk;
using Xmpp.Util;
namespace Dino.Ui {
public class AvatarDrawer {
public const string GRAY = "555753";
private Gee.List<AvatarTile> tiles = new ArrayList<AvatarTile>();
private int height = 35;
private int width = 35;
private bool gray;
private int base_factor = 1;
private string font_family = "Sans";
public AvatarDrawer size(int height, int width = height) {
this.height = height;
this.width = width;
return this;
}
public AvatarDrawer grayscale() {
this.gray = true;
return this;
}
public AvatarDrawer tile(Pixbuf? image, string? name, string? hex_color) {
tiles.add(new AvatarTile(image, name, hex_color));
return this;
}
public AvatarDrawer plus() {
tiles.add(new AvatarTile(null, "…", GRAY));
return this;
}
public AvatarDrawer scale(int base_factor) {
this.base_factor = base_factor;
return this;
}
public AvatarDrawer font(string font_family) {
this.font_family = font_family;
return this;
}
public ImageSurface draw_image_surface() {
ImageSurface surface = new ImageSurface(Format.ARGB32, width, height);
draw_on_context(new Context(surface));
return surface;
}
public void draw_on_context(Cairo.Context ctx) {
double radius = 3 * base_factor;
double degrees = Math.PI / 180.0;
ctx.new_sub_path();
ctx.arc(width - radius, radius, radius, -90 * degrees, 0 * degrees);
ctx.arc(width - radius, height - radius, radius, 0 * degrees, 90 * degrees);
ctx.arc(radius, height - radius, radius, 90 * degrees, 180 * degrees);
ctx.arc(radius, radius, radius, 180 * degrees, 270 * degrees);
ctx.close_path();
ctx.clip();
if (this.tiles.size == 4) {
Cairo.Surface buffer = new Cairo.Surface.similar(ctx.get_target(), Cairo.Content.COLOR_ALPHA, width, height);
Cairo.Context bufctx = new Cairo.Context(buffer);
bufctx.scale(0.5, 0.5);
bufctx.set_source_surface(sub_surface_idx(ctx, 0, width - 1, height - 1, 2 * base_factor), 0, 0);
bufctx.paint();
bufctx.set_source_surface(sub_surface_idx(ctx, 1, width - 1, height - 1, 2 * base_factor), width + 1, 0);
bufctx.paint();
bufctx.set_source_surface(sub_surface_idx(ctx, 2, width - 1, height - 1, 2 * base_factor), 0, height + 1);
bufctx.paint();
bufctx.set_source_surface(sub_surface_idx(ctx, 3, width - 1, height - 1, 2 * base_factor), width + 1, height + 1);
bufctx.paint();
ctx.set_source_surface(buffer, 0, 0);
ctx.paint();
} else if (this.tiles.size == 3) {
Cairo.Surface buffer = new Cairo.Surface.similar(ctx.get_target(), Cairo.Content.COLOR_ALPHA, width, height);
Cairo.Context bufctx = new Cairo.Context(buffer);
bufctx.scale(0.5, 0.5);
bufctx.set_source_surface(sub_surface_idx(ctx, 0, width - 1, height - 1, 2 * base_factor), 0, 0);
bufctx.paint();
bufctx.set_source_surface(sub_surface_idx(ctx, 1, width - 1, height * 2, 2 * base_factor), width + 1, 0);
bufctx.paint();
bufctx.set_source_surface(sub_surface_idx(ctx, 2, width - 1, height - 1, 2 * base_factor), 0, height + 1);
bufctx.paint();
ctx.set_source_surface(buffer, 0, 0);
ctx.paint();
} else if (this.tiles.size == 2) {
Cairo.Surface buffer = new Cairo.Surface.similar(ctx.get_target(), Cairo.Content.COLOR_ALPHA, width, height);
Cairo.Context bufctx = new Cairo.Context(buffer);
bufctx.scale(0.5, 0.5);
bufctx.set_source_surface(sub_surface_idx(ctx, 0, width - 1, height * 2, 2 * base_factor), 0, 0);
bufctx.paint();
bufctx.set_source_surface(sub_surface_idx(ctx, 1, width - 1, height * 2, 2 * base_factor), width + 1, 0);
bufctx.paint();
ctx.set_source_surface(buffer, 0, 0);
ctx.paint();
} else if (this.tiles.size == 1) {
ctx.set_source_surface(sub_surface_idx(ctx, 0, width, height, base_factor), 0, 0);
ctx.paint();
} else if (this.tiles.size == 0) {
ctx.set_source_surface(sub_surface_idx(ctx, -1, width, height, base_factor), 0, 0);
ctx.paint();
}
if (gray) {
// convert to greyscale
ctx.set_operator(Cairo.Operator.HSL_COLOR);
ctx.set_source_rgb(1, 1, 1);
ctx.rectangle(0, 0, width, height);
ctx.fill();
// make the visible part more light
ctx.set_operator(Cairo.Operator.ATOP);
ctx.set_source_rgba(1, 1, 1, 0.7);
ctx.rectangle(0, 0, width, height);
ctx.fill();
}
ctx.set_source_rgb(0, 0, 0);
}
private Cairo.Surface sub_surface_idx(Cairo.Context ctx, int idx, int width, int height, int font_factor = 1) {
Gdk.Pixbuf? avatar = idx >= 0 ? tiles[idx].image : null;
string? name = idx >= 0 ? tiles[idx].name : "";
string hex_color = !gray && idx >= 0 ? tiles[idx].hex_color : GRAY;
return sub_surface(ctx, font_family, avatar, name, hex_color, width, height, font_factor);
}
private static Cairo.Surface sub_surface(Cairo.Context ctx, string font_family, Gdk.Pixbuf? avatar, string? name, string? hex_color, int width, int height, int font_factor = 1) {
Cairo.Surface buffer = new Cairo.Surface.similar(ctx.get_target(), Cairo.Content.COLOR_ALPHA, width, height);
Cairo.Context bufctx = new Cairo.Context(buffer);
if (avatar == null) {
set_source_hex_color(bufctx, hex_color ?? GRAY);
bufctx.rectangle(0, 0, width, height);
bufctx.fill();
string text = name == null ? "…" : name.get_char(0).toupper().to_string();
bufctx.select_font_face(font_family, Cairo.FontSlant.NORMAL, Cairo.FontWeight.NORMAL);
bufctx.set_font_size(width / font_factor < 40 ? font_factor * 17 : font_factor * 25);
Cairo.TextExtents extents;
bufctx.text_extents(text, out extents);
double x_pos = width/2 - (extents.width/2 + extents.x_bearing);
double y_pos = height/2 - (extents.height/2 + extents.y_bearing);
bufctx.move_to(x_pos, y_pos);
bufctx.set_source_rgba(1, 1, 1, 1);
bufctx.show_text(text);
} else {
double w_scale = (double) width / avatar.width;
double h_scale = (double) height / avatar.height;
double scale = double.max(w_scale, h_scale);
bufctx.scale(scale, scale);
double x_off = 0, y_off = 0;
if (scale == h_scale) {
x_off = (width / scale - avatar.width) / 2.0;
} else {
y_off = (height / scale - avatar.height) / 2.0;
}
Gdk.cairo_set_source_pixbuf(bufctx, avatar, x_off, y_off);
bufctx.get_source().set_filter(Cairo.Filter.BEST);
bufctx.paint();
}
return buffer;
}
private static void set_source_hex_color(Cairo.Context ctx, string hex_color) {
ctx.set_source_rgba((double) from_hex(hex_color.substring(0, 2)) / 255,
(double) from_hex(hex_color.substring(2, 2)) / 255,
(double) from_hex(hex_color.substring(4, 2)) / 255,
hex_color.length > 6 ? (double) from_hex(hex_color.substring(6, 2)) / 255 : 1);
}
}
private class AvatarTile {
public Pixbuf? image { get; private set; }
public string? name { get; private set; }
public string? hex_color { get; private set; }
public AvatarTile(Pixbuf? image, string? name, string? hex_color) {
this.image = image;
this.name = name;
this.hex_color = hex_color;
}
}
}
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