screen_text: new library for displaying large texts

Took a lot of code from screen_lyrics.

3 files changed, 216 insertions, 0 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 00783807f..085396db1 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -39,6 +39,7 @@ ncmpc_headers = \
 	defaults.h \
 	i18n.h \
 	screen_browser.h \
+	screen_text.h \
 	plugin.h \
 	lyrics.h \
 	str_pool.h \
@@ -105,6 +106,10 @@ if ENABLE_PLUGIN_LIBRARY
 ncmpc_SOURCES += plugin.c
 endif
 
+if ENABLE_SCREEN_TEXT
+ncmpc_SOURCES += screen_text.c
+endif
+
 if ENABLE_LYRICS_SCREEN
 ncmpc_SOURCES += screen_lyrics.c lyrics.c
 endif
diff --git a/src/screen_text.c b/src/screen_text.c
new file mode 100644
index 000000000..13bc58d6b
--- /dev/null
+++ b/src/screen_text.c
@@ -0,0 +1,117 @@
+/*
+ * (c) 2004-2008 The Music Player Daemon Project
+ * http://www.musicpd.org/
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include "screen_text.h"
+#include "screen_utils.h"
+#include "charset.h"
+
+#include <assert.h>
+#include <string.h>
+
+void
+screen_text_clear(struct screen_text *text)
+{
+	list_window_reset(text->lw);
+
+	for (guint i = 0; i < text->lines->len; ++i)
+		g_free(g_ptr_array_index(text->lines, i));
+
+	g_ptr_array_set_size(text->lines, 0);
+}
+
+void
+screen_text_set(struct screen_text *text, const GString *str)
+{
+	const char *p, *eol, *next;
+
+	assert(str != NULL);
+
+	screen_text_clear(text);
+
+	p = str->str;
+	while ((eol = strchr(p, '\n')) != NULL) {
+		char *line;
+
+		next = eol + 1;
+
+		/* strip whitespace at end */
+
+		while (eol > p && (unsigned char)eol[-1] <= 0x20)
+			--eol;
+
+		/* create copy and append it to text->lines */
+
+		line = g_malloc(eol - p + 1);
+		memcpy(line, p, eol - p);
+		line[eol - p] = 0;
+
+		g_ptr_array_add(text->lines, line);
+
+		/* reset control characters */
+
+		for (eol = line + (eol - p); line < eol; ++line)
+			if ((unsigned char)*line < 0x20)
+				*line = ' ';
+
+		p = next;
+	}
+
+	if (*p != 0)
+		g_ptr_array_add(text->lines, g_strdup(p));
+}
+
+const char *
+screen_text_list_callback(unsigned idx, G_GNUC_UNUSED bool *highlight,
+			  void *data)
+{
+	const struct screen_text *text = data;
+	static char buffer[256];
+	char *value;
+
+	if (idx >= text->lines->len)
+		return NULL;
+
+	value = utf8_to_locale(g_ptr_array_index(text->lines, idx));
+	g_strlcpy(buffer, value, sizeof(buffer));
+	g_free(value);
+
+	return buffer;
+}
+
+bool
+screen_text_cmd(struct screen_text *text,
+		G_GNUC_UNUSED struct mpdclient *c, command_t cmd)
+{
+	if (list_window_scroll_cmd(text->lw, text->lines->len, cmd)) {
+		screen_text_repaint(text);
+		return true;
+	}
+
+	text->lw->selected = text->lw->start + text->lw->rows;
+	if (screen_find(text->lw, text->lines->len,
+			cmd, screen_text_list_callback, text)) {
+		/* center the row */
+		list_window_center(text->lw, text->lines->len,
+				   text->lw->selected);
+		screen_text_repaint(text);
+		return true;
+	}
+
+	return false;
+}
diff --git a/src/screen_text.h b/src/screen_text.h
new file mode 100644
index 000000000..031c29f4b
--- /dev/null
+++ b/src/screen_text.h
@@ -0,0 +1,94 @@
+/*
+ * (c) 2004-2008 The Music Player Daemon Project
+ * http://www.musicpd.org/
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#ifndef SCREEN_TEXT_H
+#define SCREEN_TEXT_H
+
+#include "list_window.h"
+
+#include <glib.h>
+
+struct mpdclient;
+
+struct screen_text {
+	GPtrArray *lines;
+
+	struct list_window *lw;
+};
+
+static inline void
+screen_text_init(struct screen_text *text, WINDOW *w, int cols, int rows)
+{
+	text->lines = g_ptr_array_new();
+
+	text->lw = list_window_init(w, cols, rows);
+	text->lw->hide_cursor = true;
+}
+
+void
+screen_text_clear(struct screen_text *text);
+
+static inline void
+screen_text_deinit(struct screen_text *text)
+{
+	screen_text_clear(text);
+	g_ptr_array_free(text->lines, TRUE);
+
+	list_window_free(text->lw);
+}
+
+static inline void
+screen_text_resize(struct screen_text *text, int cols, int rows)
+{
+	text->lw->cols = cols;
+	text->lw->rows = rows;
+}
+
+static inline bool
+screen_text_is_empty(const struct screen_text *text)
+{
+	return text->lines->len == 0;
+}
+
+void
+screen_text_set(struct screen_text *text, const GString *str);
+
+const char *
+screen_text_list_callback(unsigned idx, bool *highlight, void *data);
+
+static inline void
+screen_text_paint(struct screen_text *text)
+{
+	list_window_paint(text->lw, screen_text_list_callback, text);
+}
+
+/**
+ * Repaint and update the screen.
+ */
+static inline void
+screen_text_repaint(struct screen_text *text)
+{
+	screen_text_paint(text);
+	wrefresh(text->lw->w);
+}
+
+bool
+screen_text_cmd(struct screen_text *text, struct mpdclient *c, command_t cmd);
+
+#endif