crown-engine/tools/widgets/console_view.vala

/*
 * Copyright(c) 2012-2015 Daniele Bartolini and individual contributors.
 * License: https://github.com/dbartolini/crown/blob/master/LICENSE-GPLv2
 */

using Gtk;

namespace Crown
{
	public class EntryHistory
	{
		public uint _capacity;
		public uint _size;
		public uint _index;
		public string[] _data;

		// Creates a new history with room for capacity records.
		public EntryHistory(uint capacity)
		{
			_capacity = capacity;
			_size = 0;
			_index = 0;
			_data = new string[capacity];
		}

		// Push a new string into the history.
		public void push(string text)
		{
			// Add command to history
			_data[_index] = text;
			_index = (_index + 1) % _capacity;

			if (_size < _capacity)
				++_size;
		}

		public void clear()
		{
			_size = 0;
			_index = 0;
		}

		// Returns the element at @a distance slots from the current index.
		// Distance must be in the [1; _size] range.
		public string element(uint distance)
		{
			if (distance < 1 || distance > _size)
				return "ERROR";

			if (_index >= distance)
				return _data[_index - distance];
			else
				return _data[_capacity - (distance - _index)];
		}
	}

	public class ConsoleView : Gtk.Box
	{
		// Data
		public EntryHistory _entry_history;
		public uint _distance;
		public Project _project;

		// Widgets
		public Gtk.ScrolledWindow _scrolled_window;
		public Gtk.TextView _text_view;
		public Gtk.Entry _entry;
		public Gtk.Box _entry_hbox;

		public ConsoleView(Project project, Gtk.ComboBoxText combo)
		{
			Object(orientation: Gtk.Orientation.VERTICAL, spacing: 0);

			// Data
			_entry_history = new EntryHistory(256);
			_distance = 0;
			_project = project;

			// Widgets
			_text_view = new Gtk.TextView();
			_text_view.editable = false;
			_text_view.can_focus = false;

			// // Create tags for color-formatted text
			Gtk.TextTag tag_info = new Gtk.TextTag("info");
			tag_info.foreground_rgba = { 0.7, 0.7, 0.7, 1.0 };
			Gtk.TextTag tag_warning = new Gtk.TextTag("warning");
			tag_warning.foreground_rgba = { 1.0, 1.0, 0.4, 1.0 };
			Gtk.TextTag tag_error = new Gtk.TextTag("error");
			tag_error.foreground_rgba = { 1.0, 0.4, 0.4, 1.0 };

			Gtk.TextBuffer tb = _text_view.buffer;
			tb.tag_table.add(tag_info);
			tb.tag_table.add(tag_warning);
			tb.tag_table.add(tag_error);

			_scrolled_window = new Gtk.ScrolledWindow(null, null);
			_scrolled_window.add(_text_view);

			_entry = new Gtk.Entry();
			_entry.key_press_event.connect(on_entry_key_pressed);
			_entry.activate.connect(on_entry_activated);

			_entry_hbox = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 0);
			_entry_hbox.pack_start(_entry, true, true);
			_entry_hbox.pack_end(combo, false, false);

			this.pack_start(_scrolled_window, true, true, 0);
			this.pack_start(_entry_hbox, false, true, 0);

			this.show.connect(on_show);

			this.get_style_context().add_class("console-view");
			this.show_all();
		}

		private void on_entry_activated()
		{
			string text = _entry.text;
			text = text.strip();

			if (text.length > 0)
			{
				_entry_history.push(text);
				_distance = 0;

				Gtk.Application app = ((Gtk.Window)this.get_toplevel()).application;
				ConsoleClient? client = ((LevelEditorApplication)app).current_selected_client();

				if (text[0] == ':')
				{
					string[] args = text[1:text.length].split(" ");
					if (args.length > 0)
					{
						if (client != null)
							client.send(DeviceApi.command(args));
					}
				}
				else
				{
					if (client != null)
						client.send_script(text);
				}
			}

			_entry.text = "";
		}

		private bool on_entry_key_pressed(Gdk.EventKey ev)
		{
			if (ev.keyval == Gdk.Key.Down)
			{
				if (_distance > 1)
				{
					--_distance;
					_entry.text = _entry_history.element(_distance);
				}
				else
				{
					_entry.text = "";
				}
			}
			else if (ev.keyval == Gdk.Key.Up)
			{
				if (_distance < _entry_history._size)
				{
					++_distance;
					_entry.text = _entry_history.element(_distance);
				}
			}
			else
				return false;

			_entry.set_position(_entry.text.length);

			return true;
		}

		private void on_show()
		{
			_entry.grab_focus_without_selecting();
		}

		public void log(string severity, string message)
		{
			string line = message;

			// Replace IDs with human-readable names
			int id_index = message.index_of("#ID(");
			if (id_index != -1)
			{
				string id = message.substring(id_index + 4, 16);
				string name = _project.id_to_name(id);
				line = message.replace("#ID(%s)".printf(id), "'%s'".printf(name));
			}

			Gtk.TextBuffer buffer = _text_view.buffer;
			Gtk.TextIter end_iter;
			buffer.get_end_iter(out end_iter);
			buffer.insert(ref end_iter, line, line.length);
			end_iter.backward_chars(line.length);
			Gtk.TextIter start_iter = end_iter;
			buffer.get_end_iter(out end_iter);
			buffer.apply_tag(buffer.tag_table.lookup(severity), start_iter, end_iter);
			_text_view.scroll_to_mark(buffer.create_mark("bottom", end_iter, false), 0, true, 0.0, 1.0);
		}
	}
}