ui_bookmark.c

Gqview,Linux下基于GTK+库写成的轻量级而能丰富的图像浏览程序。

	if (!bm->editable) return;

	switch (info)
		{
		case TARGET_URI_LIST:
		case TARGET_X_URL:
			list = uri_list_from_text(selection_data->data, FALSE);
			break;
		}

	work = list;
	while (work)
		{
		gchar *path = work->data;
		gchar *buf;

		buf = bookmark_string(filename_from_path(path), path, NULL);
		history_list_add_to_key(bm->key, buf, 0);
		g_free(buf);

		work = work->next;
		}

	path_list_free(list);

	bookmark_populate_all(bm->key);
}

static void bookmark_list_destroy(GtkWidget *widget, gpointer data)
{
	BookMarkData *bm = data;

	bookmark_widget_list = g_list_remove(bookmark_widget_list, bm);

	g_free(bm->key);
	g_free(bm);
}

GtkWidget *bookmark_list_new(const gchar *key,
			     void (*select_func)(const gchar *path, gpointer data), gpointer select_data)
{
	GtkWidget *scrolled;
	BookMarkData *bm;
	
	if (!key) key = "bookmarks";

	bm = g_new0(BookMarkData, 1);
	bm->key = g_strdup(key);

	bm->select_func = select_func;
	bm->select_data = select_data;

	bm->no_defaults = FALSE;
	bm->editable = TRUE;

	scrolled = gtk_scrolled_window_new(NULL, NULL);
	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled),
				       GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);

	bm->box = gtk_vbox_new(FALSE, 0);
	gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(scrolled), bm->box);
	gtk_widget_show(bm->box);

	bookmark_populate(bm);

	g_signal_connect(G_OBJECT(bm->box), "destroy",
			 G_CALLBACK(bookmark_list_destroy), bm);
	g_object_set_data(G_OBJECT(bm->box), BOOKMARK_DATA_KEY, bm);
	g_object_set_data(G_OBJECT(scrolled), BOOKMARK_DATA_KEY, bm);
	bm->widget = scrolled;

	gtk_drag_dest_set(scrolled,
			  GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_DROP,
			  bookmark_drop_types, bookmark_drop_types_n,
			  GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_LINK);
	g_signal_connect(G_OBJECT(scrolled), "drag_data_received",
			 G_CALLBACK(bookmark_dnd_get_data), bm);

	bookmark_widget_list = g_list_append(bookmark_widget_list, bm);

	return scrolled;
}

void bookmark_list_set_key(GtkWidget *list, const gchar *key)
{
	BookMarkData *bm;

	if (!list || !key) return;

	bm = g_object_get_data(G_OBJECT(list), BOOKMARK_DATA_KEY);
	if (!bm) return;

	if (bm->key && strcmp(bm->key, key) == 0) return;

	g_free(bm->key);
	bm->key = g_strdup(key);

	bookmark_populate(bm);
}

void bookmark_list_set_no_defaults(GtkWidget *list, gint no_defaults)
{
	BookMarkData *bm;

	bm = g_object_get_data(G_OBJECT(list), BOOKMARK_DATA_KEY);
	if (!bm) return;

	bm->no_defaults = no_defaults;
}

void bookmark_list_set_editable(GtkWidget *list, gint editable)
{
	BookMarkData *bm;

	bm = g_object_get_data(G_OBJECT(list), BOOKMARK_DATA_KEY);
	if (!bm) return;

	bm->editable = editable;
}

void bookmark_list_add(GtkWidget *list, const gchar *name, const gchar *path)
{
	BookMarkData *bm;
	gchar *buf;

	bm = g_object_get_data(G_OBJECT(list), BOOKMARK_DATA_KEY);
	if (!bm) return;

	buf = bookmark_string(name, path, NULL);
	history_list_add_to_key(bm->key, buf, 0);
	g_free(buf);

	bookmark_populate_all(bm->key);
}

void bookmark_add_default(const gchar *name, const gchar *path)
{
	if (!name || !path) return;
	bookmark_default_list = g_list_append(bookmark_default_list, g_strdup(name));
	bookmark_default_list = g_list_append(bookmark_default_list, g_strdup(path));
}

/*
 *-----------------------------------------------------------------------------
 * combo with history key
 *-----------------------------------------------------------------------------
 */

typedef struct _HistoryComboData HistoryComboData;
struct _HistoryComboData
{
	GtkWidget *combo;
	GtkWidget *entry;
	gchar *history_key;
	gint history_levels;
};

static void history_combo_destroy(GtkWidget *widget, gpointer data)
{
	HistoryComboData *hc = data;

	g_free(hc->history_key);
	g_free(data);
}

/* if text is NULL, entry is set to the most recent item */
GtkWidget *history_combo_new(GtkWidget **entry, const gchar *text,
			     const gchar *history_key, gint max_levels)
{
	HistoryComboData *hc;
	GList *work;
	gint n = 0;

	hc = g_new0(HistoryComboData, 1);
	hc->history_key = g_strdup(history_key);
	hc->history_levels = max_levels;

	hc->combo = gtk_combo_box_entry_new_text();
#if 0
	gtk_combo_set_case_sensitive(GTK_COMBO(hc->combo), TRUE);
	gtk_combo_set_use_arrows(GTK_COMBO(hc->combo), FALSE);
#endif

	hc->entry = GTK_BIN(hc->combo)->child;

	g_object_set_data(G_OBJECT(hc->combo), "history_combo_data", hc);
	g_object_set_data(G_OBJECT(hc->entry), "history_combo_data", hc);
	g_signal_connect(G_OBJECT(hc->combo), "destroy",
			 G_CALLBACK(history_combo_destroy), hc);

	work = history_list_get_by_key(hc->history_key);
	while (work)
		{
		gtk_combo_box_append_text(GTK_COMBO_BOX(hc->combo), (gchar *)work->data);
		work = work->next;
		n++;
		}

	if (text)
		{
		gtk_entry_set_text(GTK_ENTRY(hc->entry), text);
		}
	else if (n > 0)
		{
		gtk_combo_box_set_active(GTK_COMBO_BOX(hc->combo), 0);
		}

	if (entry) *entry = hc->entry;
	return hc->combo;
}

/* if text is NULL, current entry text is used
 * widget can be the combo or entry widget
 */
void history_combo_append_history(GtkWidget *widget, const gchar *text)
{
	HistoryComboData *hc;
	gchar *new_text;

	hc = g_object_get_data(G_OBJECT(widget), "history_combo_data");
	if (!hc)
		{
		printf("widget is not a history combo\n");
		return;
		}

	if (text)
		{
		new_text = g_strdup(text);
		}
	else
		{
		new_text = g_strdup(gtk_entry_get_text(GTK_ENTRY(hc->entry)));
		}

	if (new_text && strlen(new_text) > 0)
		{
		GtkTreeModel *store;
		GList *work;

		history_list_add_to_key(hc->history_key, new_text, hc->history_levels);

		gtk_combo_box_set_active(GTK_COMBO_BOX(hc->combo), -1);

		store = gtk_combo_box_get_model(GTK_COMBO_BOX(hc->combo));
		gtk_list_store_clear(GTK_LIST_STORE(store));

		work = history_list_get_by_key(hc->history_key);
		while (work)
			{
			gtk_combo_box_append_text(GTK_COMBO_BOX(hc->combo), (gchar *)work->data);
			work = work->next;
			}
		}

	g_free(new_text);
}

/*
 *-----------------------------------------------------------------------------
 * drag and drop uri utils
 *-----------------------------------------------------------------------------
 */

/* the following characters are allowed to be unencoded for pathnames:
 *     $ & + , / : = @
 */
static gint escape_char_list[] = {
	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/*   0 */
	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/*  10 */ 
	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/*  20 */
/*	     spc !  "  #  $  %  &  '	       */
	1, 1, 0, 0, 1, 1, 0, 1, 0, 0,	/*  30 */
/*	(  )  *  +  ,  -  .  /  0  1	       */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/*  40 */
/*	2  3  4  5  6  7  8  9  :  ;	       */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 1,	/*  50 */
/*	<  =  >  ?  @  A  B  C  D  E	       */
	1, 0, 1, 1, 0, 0, 0, 0, 0, 0,	/*  60 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/*  70 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/*  80 */
/*	Z  [  \  ]  ^  _  `  a  b  c	       */
	0, 1, 1, 1, 1, 0, 1, 0, 0, 0,	/*  90 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 100 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 110 */
/*	x  y  z  {  |  }  ~ del      	       */
	0, 0, 0, 1, 1, 1, 0, 0		/* 120, 127 is end */
};

static gchar *hex_char = "0123456789ABCDEF";

static gint escape_test(guchar c)
{
	if (c < 32 || c > 127) return TRUE;
	return (escape_char_list[c] != 0);
}

static const gchar *escape_code(guchar c)
{
	static gchar text[4];

	text[0] = '%';
	text[1] = hex_char[c>>4];
	text[2] = hex_char[c%16];
	text[3] = '\0';

	return text;
}

gchar *uri_text_escape(const gchar *text)
{
	GString *string;
	gchar *result;
	const gchar *p;

	if (!text) return NULL;
	
	string = g_string_new("");

	p = text;
	while (*p != '\0')
		{
		if (escape_test(*p))
			{
			g_string_append(string, escape_code(*p));
			}
		else
			{
			g_string_append_c(string, *p);
			}
		p++;
		}

	result = string->str;
	g_string_free(string, FALSE);

	/* dropped filenames are expected to be utf-8 compatible */
	if (!g_utf8_validate(result, -1, NULL))
		{
		gchar *tmp;

		tmp = g_locale_to_utf8(result, -1, NULL, NULL, NULL);
		if (tmp)
			{
			g_free(result);
			result = tmp;
			}
		}

	return result;
}

/* this operates on the passed string, decoding escaped characters */
void uri_text_decode(gchar *text)
{
	if (strchr(text, '%'))
		{
		gchar *w;
		gchar *r;

		w = r = text;

		while(*r != '\0')
			{
			if (*r == '%' && *(r + 1) != '\0' && *(r + 2) != '\0')
				{
				gchar t[3];
				gint n;

				r++;
				t[0] = *r;
				r++;
				t[1] = *r;
				t[2] = '\0';
				n = (gint)strtol(t, NULL, 16);
				if (n > 0 && n < 256)
					{
					*w = (gchar)n;
					}
				else
					{
					/* invalid number, rewind and ignore this escape */
					r -= 2;
					*w = *r;
					}
				}
			else if (w != r)
				{
				*w = *r;
				}
			r++;
			w++;
			}
		if (*w != '\0') *w = '\0';
		}
}

static void uri_list_parse_encoded_chars(GList *list)
{
	GList *work = list;

	while (work)
		{
		gchar *text = work->data;

		uri_text_decode(text);

		work = work->next;
		}
}

GList *uri_list_from_text(gchar *data, gint files_only)
{
	GList *list = NULL;
	gint b, e;

	b = e = 0;

	while (data[b] != '\0')
		{
		while (data[e] != '\r' && data[e] != '\n' && data[e] != '\0') e++;
		if (strncmp(data + b, "file:", 5) == 0)
			{
			gchar *path;
			b += 5;
			while (data[b] == '/' && data[b+1] == '/') b++;
			path = g_strndup(data + b, e - b);
			list = g_list_append(list, path_to_utf8(path));
			g_free(path);
			}
		else if (!files_only && strncmp(data + b, "http:", 5) == 0)
			{
			list = g_list_append(list, g_strndup(data + b, e - b));
			}
		else if (!files_only && strncmp(data + b, "ftp:", 3) == 0)
			{
			list = g_list_append(list, g_strndup(data + b, e - b));
			}
		while (data[e] == '\r' || data[e] == '\n') e++;
		b = e;
		}

	uri_list_parse_encoded_chars(list);

	return list;
}

gchar *uri_text_from_list(GList *list, gint *len, gint plain_text)
{
	gchar *uri_text = NULL;
	GString *string;
	GList *work;

	if (!list)
		{
		if (len) *len = 0;
		return NULL;
		}

	string = g_string_new("");

	work = list;
	while (work)
		{
		const gchar *name8;	/* dnd filenames are in utf-8 */

		name8 = work->data;

		if (!plain_text)
			{
			gchar *escaped;

			escaped = uri_text_escape(name8);
			g_string_append(string, "file:");
			g_string_append(string, escaped);
			g_free(escaped);

			g_string_append(string, "\r\n");
			}
		else
			{
			g_string_append(string, name8);
			if (work->next) g_string_append(string, "\n");
			}

		work = work->next;
		}

	uri_text = string->str;
	if (len) *len = string->len;
	g_string_free(string, FALSE);

	return uri_text;
}