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medit/moo/mooedit/moolineview.c

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/*
* moolineview.c
*
* Copyright (C) 2004-2006 by Yevgen Muntyan <muntyan@math.tamu.edu>
*
* 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.
*
* See COPYING file that comes with this distribution.
*/
#include "mooedit/moolineview.h"
#include "mooutils/moomarshals.h"
#include "mooutils/mooutils-gobject.h"
#include "mooutils/moocompat.h"
#include <gdk/gdkkeysyms.h>
struct _MooLineViewPrivate {
MooData *line_data;
gboolean busy;
gboolean scrolled;
GtkTextMark *end_mark;
};
static void moo_line_view_finalize (GObject *object);
static void moo_line_view_realize (GtkWidget *widget);
static gboolean moo_line_view_button_release (GtkWidget *widget,
GdkEventButton *event);
static void moo_line_view_move_cursor (GtkTextView *text_view,
GtkMovementStep step,
gint count,
gboolean extend_selection);
static void moo_line_view_populate_popup (GtkTextView *text_view,
GtkMenu *menu);
static void activate (MooLineView *view,
int line);
static void activate_current_line (MooLineView *view);
static GtkTextBuffer *get_buffer (MooLineView *view);
enum {
ACTIVATE,
ACTIVATE_CURRENT_LINE,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL];
enum {
PROP_0,
};
/* MOO_TYPE_LINE_VIEW */
G_DEFINE_TYPE (MooLineView, moo_line_view, MOO_TYPE_TEXT_VIEW)
static void moo_line_view_class_init (MooLineViewClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkTextViewClass *textview_class = GTK_TEXT_VIEW_CLASS (klass);
GtkBindingSet *binding_set;
// gobject_class->set_property = moo_line_view_set_property;
// gobject_class->get_property = moo_line_view_get_property;
gobject_class->finalize = moo_line_view_finalize;
widget_class->realize = moo_line_view_realize;
widget_class->button_release_event = moo_line_view_button_release;
textview_class->move_cursor = moo_line_view_move_cursor;
textview_class->populate_popup = moo_line_view_populate_popup;
signals[ACTIVATE] =
g_signal_new ("activate",
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (MooLineViewClass, activate),
NULL, NULL,
_moo_marshal_VOID__INT,
G_TYPE_NONE, 1,
G_TYPE_INT);
signals[ACTIVATE_CURRENT_LINE] =
moo_signal_new_cb ("activate-current-line",
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (activate_current_line),
NULL, NULL,
_moo_marshal_VOID__VOID,
G_TYPE_NONE, 0);
binding_set = gtk_binding_set_by_class (klass);
gtk_binding_entry_add_signal (binding_set, GDK_Return, 0,
"activate-current-line", 0);
}
static void moo_line_view_init (MooLineView *view)
{
view->priv = g_new0 (MooLineViewPrivate, 1);
view->priv->line_data = moo_data_new (g_direct_hash,
g_direct_equal,
NULL);
g_object_set (view,
"editable", FALSE,
"cursor-visible", FALSE,
"current-line-color", "grey",
"highlight-matching-brackets", FALSE,
NULL);
}
static void moo_line_view_finalize (GObject *object)
{
MooLineView *view = MOO_LINE_VIEW (object);
moo_data_destroy (view->priv->line_data);
g_free (view->priv);
G_OBJECT_CLASS (moo_line_view_parent_class)->finalize (object);
}
GtkWidget*
moo_line_view_new (void)
{
return g_object_new (MOO_TYPE_LINE_VIEW, NULL);
}
void
moo_line_view_clear (MooLineView *view)
{
GtkTextBuffer *buffer;
GtkTextIter start, end;
g_return_if_fail (MOO_IS_LINE_VIEW (view));
buffer = get_buffer (view);
gtk_text_buffer_get_bounds (buffer, &start, &end);
gtk_text_buffer_delete (buffer, &start, &end);
moo_data_clear (view->priv->line_data);
}
static GtkTextBuffer*
get_buffer (MooLineView *view)
{
return gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
}
static gboolean
moo_line_view_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkTextView *textview = GTK_TEXT_VIEW (widget);
MooLineView *view = MOO_LINE_VIEW (widget);
int buffer_x, buffer_y;
GtkTextIter iter;
gboolean result;
result = GTK_WIDGET_CLASS(moo_line_view_parent_class)->button_release_event (widget, event);
if (gtk_text_view_get_window_type (textview, event->window) == GTK_TEXT_WINDOW_TEXT &&
!moo_text_view_has_selection (MOO_TEXT_VIEW (widget)))
{
gtk_text_view_window_to_buffer_coords (textview,
GTK_TEXT_WINDOW_TEXT,
event->x, event->y,
&buffer_x, &buffer_y);
/* XXX */
gtk_text_view_get_line_at_y (textview, &iter, buffer_y, NULL);
activate (view, gtk_text_iter_get_line (&iter));
}
return result;
}
static void
activate (MooLineView *view,
int line)
{
g_signal_emit (view, signals[ACTIVATE], 0, line);
}
static int
get_current_line (MooLineView *view)
{
GtkTextIter iter;
GtkTextBuffer *buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
gtk_text_buffer_get_iter_at_mark (buffer, &iter, gtk_text_buffer_get_insert (buffer));
return gtk_text_iter_get_line (&iter);
}
static void
activate_current_line (MooLineView *view)
{
activate (view, get_current_line (view));
}
static int
get_visible_height (GtkTextView *text_view)
{
GdkRectangle rect;
GtkTextIter iter;
int start, end;
gtk_text_view_get_visible_rect (text_view, &rect);
gtk_text_view_get_line_at_y (text_view, &iter, rect.y, NULL);
start = gtk_text_iter_get_line (&iter);
gtk_text_view_get_line_at_y (text_view, &iter, rect.y + rect.height - 1, NULL);
end = gtk_text_iter_get_line (&iter);
return end - start + 1;
}
static void
moo_line_view_move_cursor (GtkTextView *text_view,
GtkMovementStep step,
gint count,
gboolean extend_selection)
{
gboolean handle;
MooLineView *view;
GtkTextBuffer *buffer;
int current_line, new_line = 0, height, total;
GtkTextIter iter;
switch (step)
{
case GTK_MOVEMENT_LOGICAL_POSITIONS:
case GTK_MOVEMENT_VISUAL_POSITIONS:
case GTK_MOVEMENT_WORDS:
case GTK_MOVEMENT_PARAGRAPH_ENDS:
case GTK_MOVEMENT_HORIZONTAL_PAGES:
handle = FALSE;
break;
default:
handle = TRUE;
}
if (extend_selection)
handle = FALSE;
if (!handle)
return GTK_TEXT_VIEW_CLASS(moo_line_view_parent_class)->move_cursor (text_view, step, count, extend_selection);
view = MOO_LINE_VIEW (text_view);
buffer = gtk_text_view_get_buffer (text_view);
gtk_text_buffer_get_iter_at_mark (buffer, &iter, gtk_text_buffer_get_insert (buffer));
current_line = get_current_line (view);
height = get_visible_height (text_view);
total = gtk_text_buffer_get_line_count (buffer);
switch (step)
{
case GTK_MOVEMENT_DISPLAY_LINES:
case GTK_MOVEMENT_PARAGRAPHS:
new_line = current_line + count;
break;
case GTK_MOVEMENT_PAGES:
new_line = current_line + count * (height - 1);
break;
case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
case GTK_MOVEMENT_BUFFER_ENDS:
if (count < 0)
new_line = 0;
else
new_line = total - 1;
break;
case GTK_MOVEMENT_LOGICAL_POSITIONS:
case GTK_MOVEMENT_VISUAL_POSITIONS:
case GTK_MOVEMENT_WORDS:
case GTK_MOVEMENT_PARAGRAPH_ENDS:
case GTK_MOVEMENT_HORIZONTAL_PAGES:
g_return_if_reached ();
}
new_line = CLAMP (new_line, 0, total - 1);
gtk_text_buffer_get_iter_at_line (buffer, &iter, new_line);
gtk_text_buffer_place_cursor (buffer, &iter);
gtk_text_view_scroll_to_mark (text_view,
gtk_text_buffer_get_insert (buffer),
0, FALSE, 0, 0);
}
static void
moo_line_view_realize (GtkWidget *widget)
{
GdkWindow *window;
GTK_WIDGET_CLASS(moo_line_view_parent_class)->realize (widget);
window = gtk_text_view_get_window (GTK_TEXT_VIEW (widget),
GTK_TEXT_WINDOW_TEXT);
gdk_window_set_cursor (window, NULL);
}
/* XXX check line */
void
moo_line_view_set_data (MooLineView *view,
int line,
gpointer data,
GDestroyNotify free_func)
{
g_return_if_fail (MOO_IS_LINE_VIEW (view));
g_return_if_fail (line >= 0);
if (data)
moo_data_insert_ptr (view->priv->line_data,
GINT_TO_POINTER (line),
data, free_func);
else
moo_data_remove (view->priv->line_data, GINT_TO_POINTER (line));
}
gpointer
moo_line_view_get_data (MooLineView *view,
int line)
{
g_return_val_if_fail (MOO_IS_LINE_VIEW (view), NULL);
g_return_val_if_fail (line >= 0, NULL);
return moo_data_get_ptr (view->priv->line_data,
GINT_TO_POINTER (line));
}
GtkTextTag*
moo_line_view_create_tag (MooLineView *view,
const char *tag_name,
const char *first_property_name,
...)
{
GtkTextTag *tag;
GtkTextBuffer *buffer;
va_list list;
g_return_val_if_fail (MOO_IS_LINE_VIEW (view), NULL);
buffer = get_buffer (view);
tag = gtk_text_buffer_create_tag (buffer, tag_name, NULL);
g_return_val_if_fail (tag != NULL, NULL);
if (first_property_name)
{
va_start (list, first_property_name);
g_object_set_valist (G_OBJECT (tag), first_property_name, list);
va_end (list);
}
return tag;
}
GtkTextTag*
moo_line_view_lookup_tag (MooLineView *view,
const char *tag_name)
{
GtkTextTagTable *table;
GtkTextBuffer *buffer;
g_return_val_if_fail (MOO_IS_LINE_VIEW (view), NULL);
g_return_val_if_fail (tag_name != NULL, NULL);
buffer = get_buffer (view);
table = gtk_text_buffer_get_tag_table (buffer);
return gtk_text_tag_table_lookup (table, tag_name);
}
int
moo_line_view_write_line (MooLineView *view,
const char *text,
gssize len,
GtkTextTag *tag)
{
int line;
g_return_val_if_fail (MOO_IS_LINE_VIEW (view), -1);
g_return_val_if_fail (text != NULL, -1);
line = moo_line_view_start_line (view);
g_return_val_if_fail (line >= 0, -1);
moo_line_view_write (view, text, len, tag);
moo_line_view_end_line (view);
return line;
}
static void
check_if_scrolled (MooLineView *view)
{
GdkWindow *text_window;
GdkRectangle rect;
GtkTextIter iter;
int line;
if (!GTK_WIDGET_REALIZED (view))
{
view->priv->scrolled = FALSE;
return;
}
text_window = gtk_text_view_get_window (GTK_TEXT_VIEW (view),
GTK_TEXT_WINDOW_TEXT);
gtk_text_view_get_visible_rect (GTK_TEXT_VIEW (view), &rect);
gtk_text_view_get_line_at_y (GTK_TEXT_VIEW (view), &iter,
rect.y + rect.height - 1, NULL);
line = gtk_text_iter_get_line (&iter);
if (line + 2 < gtk_text_buffer_get_line_count (get_buffer (view)))
view->priv->scrolled = TRUE;
else
view->priv->scrolled = FALSE;
}
int
moo_line_view_start_line (MooLineView *view)
{
GtkTextBuffer *buffer;
GtkTextIter iter;
g_return_val_if_fail (MOO_IS_LINE_VIEW (view), -1);
g_return_val_if_fail (!view->priv->busy, -1);
view->priv->busy = TRUE;
buffer = get_buffer (view);
gtk_text_buffer_get_end_iter (buffer, &iter);
check_if_scrolled (view);
if (!gtk_text_iter_starts_line (&iter))
gtk_text_buffer_insert (buffer, &iter, "\n", 1);
return gtk_text_iter_get_line (&iter);
}
void
moo_line_view_write (MooLineView *view,
const char *text,
gssize len,
GtkTextTag *tag)
{
GtkTextBuffer *buffer;
GtkTextIter iter;
g_return_if_fail (MOO_IS_LINE_VIEW (view));
g_return_if_fail (text != NULL);
g_return_if_fail (view->priv->busy);
buffer = get_buffer (view);
gtk_text_buffer_get_end_iter (buffer, &iter);
if (g_utf8_validate (text, len, NULL))
{
gtk_text_buffer_insert_with_tags (buffer, &iter, text, len, tag, NULL);
}
else
{
char *text_utf8 = g_locale_to_utf8 (text, len, NULL, NULL, NULL);
if (text_utf8)
gtk_text_buffer_insert_with_tags (buffer, &iter, text_utf8, -1, tag, NULL);
else
g_warning ("%s: could not convert '%s' to utf8",
G_STRLOC, text);
g_free (text_utf8);
}
}
static GtkTextMark*
get_end_mark (MooLineView *view)
{
GtkTextIter iter;
GtkTextBuffer *buffer = get_buffer (view);
gtk_text_buffer_get_end_iter (buffer, &iter);
gtk_text_iter_set_line_offset (&iter, 0);
if (!view->priv->end_mark)
view->priv->end_mark =
gtk_text_buffer_create_mark (buffer, NULL, &iter, FALSE);
else
gtk_text_buffer_move_mark (buffer, view->priv->end_mark, &iter);
return view->priv->end_mark;
}
void
moo_line_view_end_line (MooLineView *view)
{
g_return_if_fail (MOO_IS_LINE_VIEW (view));
g_return_if_fail (view->priv->busy);
view->priv->busy = FALSE;
if (!view->priv->scrolled)
gtk_text_view_scroll_mark_onscreen (GTK_TEXT_VIEW (view),
get_end_mark (view));
}
static void
copy_clipboard (GtkTextView *text_view)
{
g_signal_emit_by_name (text_view, "copy-clipboard");
}
static void
moo_line_view_populate_popup (GtkTextView *text_view,
GtkMenu *menu)
{
GtkWidget *item;
gboolean has_selection, has_text;
gtk_container_foreach (GTK_CONTAINER (menu),
(GtkCallback) gtk_widget_destroy,
NULL);
item = gtk_image_menu_item_new_from_stock (GTK_STOCK_COPY, NULL);
g_signal_connect_swapped (item, "activate",
G_CALLBACK (copy_clipboard), text_view);
has_selection = moo_text_view_has_selection (MOO_TEXT_VIEW (text_view));
gtk_widget_set_sensitive (item, has_selection);
gtk_widget_show (item);
gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
item = gtk_image_menu_item_new_from_stock (GTK_STOCK_SELECT_ALL, NULL);
g_signal_connect_swapped (item, "activate",
G_CALLBACK (moo_text_view_select_all),
text_view);
has_text = moo_text_view_has_text (MOO_TEXT_VIEW (text_view));
gtk_widget_set_sensitive (item, has_text);
gtk_widget_show (item);
gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
}
void
moo_line_view_set_line_data (MooLineView *view,
int line,
const GValue *data)
{
g_return_if_fail (MOO_IS_LINE_VIEW (view));
g_return_if_fail (line >= 0);
g_return_if_fail (!data || G_IS_VALUE (data));
if (data)
moo_data_insert_value (view->priv->line_data,
GINT_TO_POINTER (line),
data);
else
moo_data_remove (view->priv->line_data,
GINT_TO_POINTER (line));
}
gboolean
moo_line_view_get_line_data (MooLineView *view,
int line,
GValue *dest)
{
g_return_val_if_fail (MOO_IS_LINE_VIEW (view), FALSE);
g_return_val_if_fail (line >= 0, FALSE);
g_return_val_if_fail (!G_IS_VALUE (dest), FALSE);
return moo_data_get_value (view->priv->line_data,
GINT_TO_POINTER (line),
dest);
}
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