CursesInfoPopup: separated the Curses popup widget from the rest of the UI code

 * this has been prepared a long time ago
 * the popup widget does not in any way depend on the InterfaceCurses
   class and could be used elsewhere.
 * common and generic Curses drawing functions required by both the
   Curses UI and the CursesInfoPopup widget have been factored out
   into curses-utils.cpp (namespace Curses)
 * this improved the UI-logic separation and helped in making
   interface-curses.cpp smaller

1 files changed, 152 insertions, 0 deletions

diff --git a/src/interface-curses/curses-utils.cpp b/src/interface-curses/curses-utils.cpp
new file mode 100644
index 0000000..add9a69
--- /dev/null
+++ b/src/interface-curses/curses-utils.cpp
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2012-2016 Robin Haberkorn
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+
+#include <glib.h>
+
+#include <curses.h>
+
+#include "sciteco.h"
+#include "string-utils.h"
+#include "curses-utils.h"
+
+namespace SciTECO {
+
+gsize
+Curses::format_str(WINDOW *win, const gchar *str,
+                   gssize len, gint max_width)
+{
+	int old_x, old_y;
+	gint chars_added = 0;
+
+	getyx(win, old_y, old_x);
+
+	if (len < 0)
+		len = strlen(str);
+	if (max_width < 0)
+		max_width = getmaxx(win) - old_x;
+
+	while (len > 0) {
+		/*
+		 * NOTE: This mapping is similar to
+		 * View::set_representations()
+		 */
+		switch (*str) {
+		case CTL_KEY_ESC:
+			chars_added++;
+			if (chars_added > max_width)
+				goto truncate;
+			waddch(win, '$' | A_REVERSE);
+			break;
+		case '\r':
+			chars_added += 2;
+			if (chars_added > max_width)
+				goto truncate;
+			waddch(win, 'C' | A_REVERSE);
+			waddch(win, 'R' | A_REVERSE);
+			break;
+		case '\n':
+			chars_added += 2;
+			if (chars_added > max_width)
+				goto truncate;
+			waddch(win, 'L' | A_REVERSE);
+			waddch(win, 'F' | A_REVERSE);
+			break;
+		case '\t':
+			chars_added += 3;
+			if (chars_added > max_width)
+				goto truncate;
+			waddch(win, 'T' | A_REVERSE);
+			waddch(win, 'A' | A_REVERSE);
+			waddch(win, 'B' | A_REVERSE);
+			break;
+		default:
+			if (IS_CTL(*str)) {
+				chars_added += 2;
+				if (chars_added > max_width)
+					goto truncate;
+				waddch(win, '^' | A_REVERSE);
+				waddch(win, CTL_ECHO(*str) | A_REVERSE);
+			} else {
+				chars_added++;
+				if (chars_added > max_width)
+					goto truncate;
+				waddch(win, *str);
+			}
+		}
+
+		str++;
+		len--;
+	}
+
+	return getcurx(win) - old_x;
+
+truncate:
+	if (max_width >= 3) {
+		/*
+		 * Truncate string
+		 */
+		wattron(win, A_UNDERLINE | A_BOLD);
+		mvwaddstr(win, old_y, old_x + max_width - 3, "...");
+		wattroff(win, A_UNDERLINE | A_BOLD);
+	}
+
+	return getcurx(win) - old_x;
+}
+
+gsize
+Curses::format_filename(WINDOW *win, const gchar *filename,
+                        gint max_width)
+{
+	int old_x = getcurx(win);
+
+	gchar *filename_canon = String::canonicalize_ctl(filename);
+	size_t filename_len = strlen(filename_canon);
+
+	if (max_width < 0)
+		max_width = getmaxx(win) - old_x;
+
+	if (filename_len <= (size_t)max_width) {
+		waddstr(win, filename_canon);
+	} else {
+		const gchar *keep_post = filename_canon + filename_len -
+		                         max_width + 3;
+
+#ifdef G_OS_WIN32
+		const gchar *keep_pre = g_path_skip_root(filename_canon);
+		if (keep_pre) {
+			waddnstr(win, filename_canon,
+			         keep_pre - filename_canon);
+			keep_post += keep_pre - filename_canon;
+		}
+#endif
+		wattron(win, A_UNDERLINE | A_BOLD);
+		waddstr(win, "...");
+		wattroff(win, A_UNDERLINE | A_BOLD);
+		waddstr(win, keep_post);
+	}
+
+	g_free(filename_canon);
+	return getcurx(win) - old_x;
+}
+
+} /* namespace SciTECO */