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|
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* nautilus-icon-text-item: an editable text block with word wrapping for the
* GNOME canvas.
*
* Copyright (C) 1998, 1999 The Free Software Foundation
*
* Authors: Miguel de Icaza <miguel@gnu.org>
* Federico Mena <federico@gimp.org>
*
*/
#include <config.h>
#include "nautilus-icon-text-item.h"
#include "nautilus-entry.h"
#include "nautilus-theme.h"
#include <libnautilus/nautilus-undo.h>
#include "nautilus-gdk-extensions.h"
#include <math.h>
#include <stdio.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtkmain.h>
#include <gtk/gtksignal.h>
#include <gtk/gtkwindow.h>
#include <libgnome/gnome-i18n.h>
#include <libart_lgpl/art_rgb_affine.h>
#include <libart_lgpl/art_rgb_rgba_affine.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
/* Margins used to display the information */
#define MARGIN_X 2
#define MARGIN_Y 2
/* Default fontset to be used if the user specified fontset is not found */
#define DEFAULT_FONT_NAME "-adobe-helvetica-medium-r-normal--*-100-*-*-*-*-*-*," \
"-*-*-medium-r-normal--10-*-*-*-*-*-*-*,*"
/* Separators for text layout */
#define DEFAULT_SEPARATORS " \t-.[]#"
/* Aliases to minimize screen use in my laptop */
#define ITI(x) NAUTILUS_ICON_TEXT_ITEM (x)
#define ITI_CLASS(x) NAUTILUS_ICON_TEXT_ITEM_CLASS (x)
#define IS_ITI(x) NAUTILUS_IS_ICON_TEXT_ITEM (x)
typedef NautilusIconTextItem Iti;
/* Signal callbacks */
static void register_rename_undo (NautilusIconTextItem *item);
static void restore_from_undo_snapshot_callback (GtkObject *target, gpointer callback_data);
/* Private part of the NautilusIconTextItem structure */
typedef struct {
/* Font */
GdkFont *font;
/* Create an offscreen window and place an entry inside it */
NautilusEntry *entry;
GtkWidget *entry_top;
/* Whether the user pressed the mouse while the item was unselected */
guint unselected_click : 1;
/* Whether we need to update the position */
guint need_pos_update : 1;
/* Whether we need to update the font */
guint need_font_update : 1;
/* Whether we need to update the text */
guint need_text_update : 1;
/* Whether we need to update because the editing/selected state changed */
guint need_state_update : 1;
/* Store min width and height. These are used when the text entry is empty. */
guint min_width;
guint min_height;
gboolean undo_registered;
} ItiPrivate;
static GnomeCanvasItemClass *parent_class;
enum {
ARG_0,
};
enum {
TEXT_CHANGED,
TEXT_EDITED,
HEIGHT_CHANGED,
WIDTH_CHANGED,
EDITING_STARTED,
EDITING_STOPPED,
SELECTION_STARTED,
SELECTION_STOPPED,
LAST_SIGNAL
};
static guint iti_signals [LAST_SIGNAL] = { 0 };
/* Stops the editing state of an icon text item */
static void
iti_stop_editing (Iti *iti)
{
ItiPrivate *priv;
priv = iti->priv;
iti->editing = FALSE;
gtk_widget_destroy (priv->entry_top);
priv->entry = NULL;
priv->entry_top = NULL;
priv->need_state_update = TRUE;
gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (iti));
gtk_signal_emit (GTK_OBJECT (iti), iti_signals[EDITING_STOPPED]);
}
/* Lays out the text in an icon item */
static void
layout_text (Iti *iti)
{
ItiPrivate *priv;
char *text;
int old_width, old_height;
int width, height;
priv = iti->priv;
/* Save old size */
if (iti->ti) {
old_width = iti->ti->width + 2 * MARGIN_X;
old_height = iti->ti->height + 2 * MARGIN_Y;
gnome_icon_text_info_free (iti->ti);
} else {
old_width = 2 * MARGIN_X;
old_height = 2 * MARGIN_Y;
}
/* Change the text layout */
if (iti->editing)
text = gtk_entry_get_text (GTK_ENTRY(priv->entry));
else
text = iti->text;
iti->ti = gnome_icon_layout_text (priv->font,
text,
DEFAULT_SEPARATORS,
iti->width - 2 * MARGIN_X,
TRUE);
/* Check the sizes and see if we need to emit any signals */
width = iti->ti->width + 2 * MARGIN_X;
height = iti->ti->height + 2 * MARGIN_Y;
if (width != old_width)
gtk_signal_emit (GTK_OBJECT (iti), iti_signals[WIDTH_CHANGED]);
if (height != old_height)
gtk_signal_emit (GTK_OBJECT (iti), iti_signals[HEIGHT_CHANGED]);
gtk_signal_emit (GTK_OBJECT (iti), iti_signals [TEXT_EDITED]);
}
/* Accepts the text in the off-screen entry of an icon text item */
static void
iti_edition_accept (Iti *iti)
{
ItiPrivate *priv;
gboolean accept;
priv = iti->priv;
accept = TRUE;
gtk_signal_emit (GTK_OBJECT (iti), iti_signals [TEXT_CHANGED], &accept);
if (iti->editing){
if (accept) {
if (iti->is_text_allocated)
g_free (iti->text);
iti->text = g_strdup (gtk_entry_get_text (GTK_ENTRY(priv->entry)));
iti->is_text_allocated = 1;
}
iti_stop_editing (iti);
}
layout_text (iti);
priv->need_text_update = TRUE;
gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (iti));
}
/* Callback used when the off-screen entry of an icon text item is activated.
* When this happens, we have to accept edition.
*/
static void
iti_entry_activate (GtkWidget *entry, Iti *iti)
{
iti_edition_accept (iti);
}
/* Starts the editing state of an icon text item */
static void
iti_start_editing (Iti *iti)
{
ItiPrivate *priv;
priv = iti->priv;
if (iti->editing)
return;
/* Trick: The actual edition of the entry takes place in a NautilusEntry
* which is placed offscreen. That way we get all of the advantages
* from NautilusEntry without duplicating code. Yes, this is a hack.
*/
priv->entry = (NautilusEntry *) nautilus_entry_new ();
gtk_entry_set_text (GTK_ENTRY(priv->entry), iti->text);
gtk_signal_connect (GTK_OBJECT (priv->entry), "activate",
GTK_SIGNAL_FUNC (iti_entry_activate), iti);
priv->entry_top = gtk_window_new (GTK_WINDOW_POPUP);
gtk_container_add (GTK_CONTAINER (priv->entry_top), GTK_WIDGET (priv->entry));
gtk_widget_set_uposition (priv->entry_top, 20000, 20000);
gtk_widget_show_all (priv->entry_top);
gtk_editable_select_region (GTK_EDITABLE (priv->entry), 0, -1);
iti->editing = TRUE;
priv->need_state_update = TRUE;
gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (iti));
gtk_signal_emit (GTK_OBJECT (iti), iti_signals[EDITING_STARTED]);
}
/* Destroy method handler for the icon text item */
static void
iti_destroy (GtkObject *object)
{
Iti *iti;
ItiPrivate *priv;
GnomeCanvasItem *item;
g_return_if_fail (object != NULL);
g_return_if_fail (IS_ITI (object));
iti = ITI (object);
priv = iti->priv;
item = GNOME_CANVAS_ITEM (object);
/* Queue redraw of bounding box */
gnome_canvas_request_redraw (item->canvas, item->x1, item->y1, item->x2, item->y2);
/* Free everything */
if (iti->font)
gdk_font_unref (iti->font);
if (iti->text && iti->is_text_allocated)
g_free (iti->text);
if (iti->ti)
gnome_icon_text_info_free (iti->ti);
if (priv->font)
gdk_font_unref (priv->font);
if (priv->entry_top)
gtk_widget_destroy (priv->entry_top);
g_free (priv);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
/* set_arg handler for the icon text item */
static void
iti_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
Iti *iti;
ItiPrivate *priv;
iti = ITI (object);
priv = iti->priv;
switch (arg_id) {
default:
break;
}
}
/* Recomputes the bounding box of an icon text item */
static void
recompute_bounding_box (Iti *iti)
{
GnomeCanvasItem *item;
double affine[6];
ArtPoint p, q;
int x1, y1, x2, y2;
int width, height;
ItiPrivate *priv;
item = GNOME_CANVAS_ITEM (iti);
priv = iti->priv;
/* Compute width, height, position */
width = iti->ti->width + 2 * MARGIN_X;
height = iti->ti->height + 2 * MARGIN_Y;
/* Verify we are not smaller than default settings */
if (width < priv->min_width)
width = priv->min_width;
if (height < priv->min_height)
height = priv->min_height;
x1 = iti->x + (iti->width - width) / 2;
y1 = iti->y;
x2 = x1 + width;
y2 = y1 + height;
/* Translate to world coordinates */
gnome_canvas_item_i2w_affine (item, affine);
p.x = x1;
p.y = y1;
art_affine_point (&q, &p, affine);
item->x1 = q.x;
item->y1 = q.y;
p.x = x2;
p.y = y2;
art_affine_point (&q, &p, affine);
item->x2 = q.x;
item->y2 = q.y;
}
/* Update method for the icon text item */
static void
iti_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
{
Iti *iti;
ItiPrivate *priv;
iti = ITI (item);
priv = iti->priv;
if (parent_class->update)
(* parent_class->update) (item, affine, clip_path, flags);
/* If necessary, queue a redraw of the old bounding box */
if ((flags & GNOME_CANVAS_UPDATE_VISIBILITY)
|| (flags & GNOME_CANVAS_UPDATE_AFFINE)
|| priv->need_pos_update
|| priv->need_font_update
|| priv->need_text_update)
gnome_canvas_request_redraw (item->canvas, item->x1, item->y1, item->x2, item->y2);
/* Compute new bounds */
if (priv->need_pos_update
|| priv->need_font_update
|| priv->need_text_update)
recompute_bounding_box (iti);
/* Queue redraw */
gnome_canvas_request_redraw (item->canvas, item->x1, item->y1, item->x2, item->y2);
priv->need_pos_update = FALSE;
priv->need_font_update = FALSE;
priv->need_text_update = FALSE;
priv->need_state_update = FALSE;
}
/* utility to fetch a color from a theme */
static void
fetch_themed_color (const char *property_name, GdkColor *color)
{
char *color_string;
color_string = nautilus_theme_get_theme_data ("icon", property_name);
if (color_string == NULL) {
color_string = g_strdup ("rgb:FFFF/FFFF/FFFF");
}
gdk_color_parse (color_string, color);
g_free (color_string);
}
/* Draw the icon text item's text when it is being edited */
static void
iti_paint_text (Iti *iti, GdkDrawable *drawable, int x, int y)
{
ItiPrivate *priv;
GnomeIconTextInfoRow *row;
GnomeIconTextInfo *ti;
GtkStyle *style;
GdkGC *fg_gc, *bg_gc;
GdkGC *gc, *bgc, *sgc, *bsgc;
GList *item;
GdkGCValues save_gc;
GdkColor highlight_background_color, highlight_text_color, fill_color;
int xpos, len;
int cursor, offset, i;
GnomeCanvasItem *canvas_item;
xpos = 0;
offset = 0;
priv = iti->priv;
style = GTK_WIDGET (GNOME_CANVAS_ITEM (iti)->canvas)->style;
ti = iti->ti;
len = 0;
y += ti->font->ascent;
cursor = 0;
i = -1;
/*
* Pointers to all of the GCs we use
*/
gc = style->fg_gc [GTK_STATE_NORMAL];
bgc = style->bg_gc [GTK_STATE_NORMAL];
sgc = style->fg_gc [GTK_STATE_SELECTED];
bsgc = style->bg_gc [GTK_STATE_SELECTED];
/* fetch the colors from the theme */
fetch_themed_color ("HIGHLIGHT_BACKGROUND_COLOR", &highlight_background_color);
fetch_themed_color ("HIGHLIGHT_TEXT_COLOR", &highlight_text_color);
fetch_themed_color ("TEXT_FILL_COLOR", &fill_color);
/* Set up user defined colors */
canvas_item = GNOME_CANVAS_ITEM (iti);
gdk_colormap_alloc_color
(gtk_widget_get_colormap (GTK_WIDGET (canvas_item->canvas)),
&highlight_background_color, FALSE, TRUE);
gdk_colormap_alloc_color
(gtk_widget_get_colormap (GTK_WIDGET (canvas_item->canvas)),
&highlight_text_color, FALSE, TRUE);
gdk_colormap_alloc_color
(gtk_widget_get_colormap (GTK_WIDGET (canvas_item->canvas)),
&fill_color, FALSE, TRUE);
for (item = ti->rows; item; item = item->next, len += (row ? row->text_length : 0)) {
GdkWChar *text_wc;
int text_length;
int sel_start, sel_end;
row = item->data;
if (!row) {
y += ti->baseline_skip / 2;
continue;
}
text_wc = row->text_wc;
text_length = row->text_length;
xpos = (ti->width - row->width) / 2;
sel_start = GTK_EDITABLE (priv->entry)->selection_start_pos - len;
sel_end = GTK_EDITABLE (priv->entry)->selection_end_pos - len;
offset = 0;
cursor = GTK_EDITABLE (priv->entry)->current_pos - len;
for (i = 0; *text_wc; text_wc++, i++) {
int size, px;
size = gdk_text_width_wc (ti->font, text_wc, 1);
px = x + xpos + offset;
if (i >= sel_start && i < sel_end) {
/* Draw selection */
fg_gc = sgc;
bg_gc = bsgc;
gdk_gc_get_values (bg_gc, &save_gc);
gdk_gc_set_foreground (bg_gc, &highlight_background_color);
gdk_draw_rectangle (drawable,
bg_gc,
TRUE,
px,
y - ti->font->ascent,
size, ti->baseline_skip);
gdk_gc_set_foreground (bg_gc, &highlight_text_color);
gdk_draw_text_wc (drawable,
ti->font,
fg_gc,
px, y,
text_wc, 1);
} else {
/* Draw unselected area */
fg_gc = gc;
bg_gc = bgc;
gdk_gc_get_values (bg_gc, &save_gc);
gdk_gc_set_foreground (bg_gc, &fill_color);
gdk_draw_rectangle (drawable,
bg_gc,
TRUE,
px,
y - ti->font->ascent,
size, ti->baseline_skip);
gdk_draw_text_wc (drawable,
ti->font,
fg_gc,
px, y,
text_wc, 1);
}
if (cursor == i) {
gdk_draw_line (drawable,
gc,
px,
y - ti->font->ascent,
px,
y + ti->font->descent - 1);
}
offset += size;
/* Restore colors */
gdk_gc_set_foreground(bg_gc, &save_gc.foreground);
gdk_gc_set_background(bg_gc, &save_gc.background);
}
y += ti->baseline_skip;
}
/* The i-beam should only be drawn at the end of a line of text if that line is the
* only or last line of text in a label. We subtract one from the x position
* so the i-beam is not visually jammed against the edge of the bounding rect. */
if (cursor == i) {
int px = x + xpos + offset;
y -= ti->baseline_skip;
gdk_draw_line (drawable,
gc,
px - 1,
y - ti->font->ascent,
px - 1,
y + ti->font->descent - 1);
}
}
/* Draw method handler for the icon text item */
static void
iti_draw (GnomeCanvasItem *item, GdkDrawable *drawable, int x, int y, int width, int height)
{
Iti *iti;
GtkStyle *style;
int w, h;
int xofs, yofs;
ItiPrivate *priv;
iti = ITI (item);
priv = iti->priv;
if (iti->ti) {
w = iti->ti->width + 2 * MARGIN_X;
h = iti->ti->height + 2 * MARGIN_Y;
/* Make sure we aren't smaller than default settings */
if (w < priv->min_width)
w = priv->min_width;
if (h < priv->min_height)
h = priv->min_height;
} else {
w = 2 * MARGIN_X;
h = 2 * MARGIN_Y;
}
xofs = item->x1 - x;
yofs = item->y1 - y;
style = GTK_WIDGET (item->canvas)->style;
if (iti->editing) {
/* Draw outline around text */
gdk_draw_rectangle (drawable,
style->fg_gc[GTK_STATE_NORMAL],
FALSE,
xofs, yofs,
w - 1, h - 1);
iti_paint_text (iti, drawable, xofs + MARGIN_X, yofs + MARGIN_Y);
} else {
if (iti->selected) {
gdk_draw_rectangle (drawable,
style->bg_gc[GTK_STATE_SELECTED],
TRUE,
xofs, yofs,
w, h);
}
gnome_icon_paint_text (iti->ti,
drawable,
style->fg_gc[(iti->selected
? GTK_STATE_SELECTED
: GTK_STATE_NORMAL)],
xofs + MARGIN_X,
yofs + MARGIN_Y,
GTK_JUSTIFY_CENTER);
}
}
/* utility to draw a pixbuf to the anti-aliased canvas */
static void
draw_pixbuf_aa (GdkPixbuf *pixbuf, GnomeCanvasBuf *buf, double affine[6], int x_offset, int y_offset)
{
void (* affine_function)
(art_u8 *dst, int x0, int y0, int x1, int y1, int dst_rowstride,
const art_u8 *src, int src_width, int src_height, int src_rowstride,
const double affine[6],
ArtFilterLevel level,
ArtAlphaGamma *alpha_gamma);
affine[4] += x_offset;
affine[5] += y_offset;
affine_function = gdk_pixbuf_get_has_alpha (pixbuf)
? art_rgb_rgba_affine
: art_rgb_affine;
(* affine_function)
(buf->buf,
buf->rect.x0, buf->rect.y0,
buf->rect.x1, buf->rect.y1,
buf->buf_rowstride,
gdk_pixbuf_get_pixels (pixbuf),
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf),
gdk_pixbuf_get_rowstride (pixbuf),
affine,
ART_FILTER_NEAREST,
NULL);
affine[4] -= x_offset;
affine[5] -= y_offset;
}
static void
iti_render (GnomeCanvasItem *item, GnomeCanvasBuf *buffer)
{
GdkVisual *visual;
GdkGC *gc;
GdkColormap *colormap;
GdkPixmap *pixmap;
GdkPixbuf *text_pixbuf;
double affine[6];
int text_width, text_height;
visual = gdk_visual_get_system ();
art_affine_identity(affine);
text_width = item->x2 - item->x1;
text_height = item->y2 - item->y1;
/* allocate a pixmap to draw the text into, and clear it to white */
pixmap = gdk_pixmap_new (NULL, text_width, text_height, visual->depth);
gc = gdk_gc_new (pixmap);
gdk_rgb_gc_set_foreground (gc,
NAUTILUS_RGB_COLOR_WHITE);
gdk_draw_rectangle (pixmap, gc, TRUE,
0, 0,
text_width,
text_height);
gdk_gc_unref (gc);
/* use a common routine to draw the label into the pixmap */
iti_draw (item, pixmap, (int) item->x1, (int) item->y1, text_width, text_height);
/* turn it into a pixbuf */
colormap = gdk_colormap_new (visual, FALSE);
text_pixbuf = gdk_pixbuf_get_from_drawable
(NULL, pixmap, colormap,
0, 0,
0, 0,
text_width,
text_height);
gdk_colormap_unref (colormap);
gdk_pixmap_unref (pixmap);
/* draw the pixbuf containing the label */
draw_pixbuf_aa (text_pixbuf, buffer, affine, (int)item->x1, (int)item->y1);
gdk_pixbuf_unref (text_pixbuf);
}
/* Point method handler for the icon text item */
static double
iti_point (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item)
{
double dx, dy;
*actual_item = item;
if (cx < item->x1)
dx = item->x1 - cx;
else if (cx > item->x2)
dx = cx - item->x2;
else
dx = 0.0;
if (cy < item->y1)
dy = item->y1 - cy;
else if (cy > item->y2)
dy = cy - item->y2;
else
dy = 0.0;
return sqrt (dx * dx + dy * dy);
}
/* Given X, Y, a mouse position, return a valid index inside the edited text */
static int
iti_idx_from_x_y (Iti *iti, int x, int y)
{
ItiPrivate *priv;
GnomeIconTextInfoRow *row;
int lines;
int line, col, i, idx;
GList *l;
priv = iti->priv;
if (iti->ti->rows == NULL)
return 0;
lines = g_list_length (iti->ti->rows);
line = y / iti->ti->baseline_skip;
if (line < 0)
line = 0;
else if (lines < line + 1)
line = lines - 1;
/* Compute the base index for this line */
for (l = iti->ti->rows, idx = i = 0; i < line; l = l->next, i++) {
row = l->data;
idx += row->text_length;
}
row = g_list_nth (iti->ti->rows, line)->data;
col = 0;
if (row != NULL) {
int first_char;
int last_char;
first_char = (iti->ti->width - row->width) / 2;
last_char = first_char + row->width;
if (x < first_char) {
/* nothing */
} else if (x > last_char) {
col = row->text_length;
} else {
GdkWChar *s = row->text_wc;
int pos = first_char;
while (pos < last_char) {
pos += gdk_text_width_wc (iti->ti->font, s, 1);
if (pos > x)
break;
col++;
s++;
}
}
}
idx += col;
g_assert (idx <= GTK_ENTRY(priv->entry)->text_size);
return idx;
}
/* Starts the selection state in the icon text item */
static void
iti_start_selecting (Iti *iti, int idx, guint32 event_time)
{
ItiPrivate *priv;
GtkEditable *e;
GdkCursor *ibeam;
priv = iti->priv;
e = GTK_EDITABLE (priv->entry);
gtk_editable_select_region (e, idx, idx);
gtk_editable_set_position (e, idx);
ibeam = gdk_cursor_new (GDK_XTERM);
gnome_canvas_item_grab (GNOME_CANVAS_ITEM (iti),
GDK_BUTTON_RELEASE_MASK |
GDK_POINTER_MOTION_MASK,
ibeam, event_time);
gdk_cursor_destroy (ibeam);
gtk_editable_select_region (e, idx, idx);
e->current_pos = e->selection_start_pos;
e->has_selection = TRUE;
iti->selecting = TRUE;
priv->need_state_update = TRUE;
gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (iti));
gtk_signal_emit (GTK_OBJECT (iti), iti_signals[SELECTION_STARTED]);
}
/* Stops the selection state in the icon text item */
static void
iti_stop_selecting (Iti *iti, guint32 event_time)
{
ItiPrivate *priv;
GnomeCanvasItem *item;
GtkEditable *e;
priv = iti->priv;
item = GNOME_CANVAS_ITEM (iti);
e = GTK_EDITABLE (priv->entry);
gnome_canvas_item_ungrab (item, event_time);
e->has_selection = FALSE;
iti->selecting = FALSE;
priv->need_state_update = TRUE;
gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (iti));
gtk_signal_emit (GTK_OBJECT (iti), iti_signals[SELECTION_STOPPED]);
}
/* Handles selection range changes on the icon text item */
static void
iti_selection_motion (Iti *iti, int idx)
{
ItiPrivate *priv;
GtkEditable *e;
priv = iti->priv;
e = GTK_EDITABLE (priv->entry);
if (idx < e->current_pos) {
e->selection_start_pos = idx;
e->selection_end_pos = e->current_pos;
} else {
e->selection_start_pos = e->current_pos;
e->selection_end_pos = idx;
}
priv->need_state_update = TRUE;
gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (iti));
}
/* Position insertion point based on arrow key event */
static void
iti_handle_arrow_key_event (NautilusIconTextItem *iti, GdkEvent *event)
{
ItiPrivate *priv;
GnomeIconTextInfoRow *row;
GList *list;
GtkEditable *editable;
int index, lines, line;
int position, pos_count, new_position;
int cur_count, prev_count, next_count;
float scale;
/* Get number of lines. Do nothing if we have only one line */
lines = g_list_length (iti->ti->rows);
if (lines <= 1) {
return;
}
/* Figure out which line the current insertion point is on */
priv = iti->priv;
editable = GTK_EDITABLE (priv->entry);
pos_count = position = gtk_editable_get_position (editable);
for (list = iti->ti->rows, line = -1, index = 1; index <= lines; index++) {
if (list != NULL) {
row = list->data;
if (pos_count > row->text_length) {
list = list->next;
pos_count -= row->text_length;
}
else {
line = index;
break;
}
}
}
/* Calculate new position of insertion point */
switch (event->key.keyval) {
case GDK_Up:
/* Try to set insertion point to previous line */
if (line > 1) {
list = g_list_nth(iti->ti->rows, line - 1);
row = list->data;
cur_count = row->text_length;
list = g_list_nth(iti->ti->rows, line - 2);
row = list->data;
prev_count = row->text_length;
scale = (float)prev_count / (float)cur_count;
new_position = pos_count * scale;
position -= prev_count + pos_count;
position += new_position;
gtk_editable_set_position (editable, position);
}
break;
case GDK_Down:
/* Try to set insertion point to next line */
if (line < lines) {
int new_position;
list = g_list_nth(iti->ti->rows, line - 1);
row = list->data;
cur_count = row->text_length;
list = g_list_nth(iti->ti->rows, line);
row = list->data;
next_count = row->text_length;
scale = (float)next_count / (float)cur_count;
new_position = pos_count * scale;
new_position += (position + (cur_count - pos_count));
gtk_editable_set_position (editable, new_position);
}
break;
default:
break;
}
}
/* Event handler for icon text items */
static gint
iti_event (GnomeCanvasItem *item, GdkEvent *event)
{
Iti *iti;
ItiPrivate *priv;
int idx;
double x, y;
int cx, cy;
iti = ITI (item);
priv = iti->priv;
switch (event->type) {
case GDK_KEY_PRESS:
if (!iti->editing)
break;
switch(event->key.keyval) {
/* Pass these events back to parent */
case GDK_Escape:
case GDK_Return:
case GDK_KP_Enter:
return FALSE;
/* Handle up and down arrow keys. GdkEntry does not know
* how to handle multi line items */
case GDK_Up:
case GDK_Down:
iti_handle_arrow_key_event(iti, event);
break;
default:
/* Check for control key operations */
if (event->key.state & GDK_CONTROL_MASK) {
return FALSE;
}
/* Register undo transaction if neccessary */
if (!priv->undo_registered) {
priv->undo_registered = TRUE;
register_rename_undo (iti);
}
/* Handle any events that reach us */
gtk_widget_event (GTK_WIDGET (priv->entry), event);
break;
}
/* Update text item to reflect changes */
layout_text (iti);
priv->need_text_update = TRUE;
gnome_canvas_item_request_update (item);
return TRUE;
case GDK_BUTTON_PRESS:
if (!iti->editing)
break;
if (iti->editing && event->button.button == 1) {
gnome_canvas_w2c(item->canvas, event->button.x, event->button.y, &cx, &cy);
x = cx - (item->x1 + MARGIN_X);
y = cy - (item->y1 + MARGIN_Y);
idx = iti_idx_from_x_y (iti, x, y);
iti_start_selecting (iti, idx, event->button.time);
}
return TRUE;
case GDK_MOTION_NOTIFY:
if (!iti->selecting)
break;
gnome_canvas_w2c(item->canvas, event->button.x, event->button.y, &cx, &cy);
x = cx - (item->x1 + MARGIN_X);
y = cy - (item->y1 + MARGIN_Y);
idx = iti_idx_from_x_y (iti, x, y);
iti_selection_motion (iti, idx);
return TRUE;
case GDK_BUTTON_RELEASE:
if (iti->selecting && event->button.button == 1)
iti_stop_selecting (iti, event->button.time);
else
break;
return TRUE;
case GDK_FOCUS_CHANGE:
if (iti->editing && event->focus_change.in == FALSE)
iti_edition_accept (iti);
return TRUE;
default:
break;
}
return FALSE;
}
/* Bounds method handler for the icon text item */
static void
iti_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
{
Iti *iti;
int width, height;
iti = ITI (item);
if (iti->ti) {
width = iti->ti->width + 2 * MARGIN_X;
height = iti->ti->height + 2 * MARGIN_Y;
} else {
width = 2 * MARGIN_X;
height = 2 * MARGIN_Y;
}
*x1 = iti->x + (iti->width - width) / 2;
*y1 = iti->y;
*x2 = *x1 + width;
*y2 = *y1 + height;
}
/* Class initialization function for the icon text item */
static void
iti_class_init (NautilusIconTextItemClass *text_item_class)
{
GtkObjectClass *object_class;
GnomeCanvasItemClass *item_class;
object_class = (GtkObjectClass *) text_item_class;
item_class = (GnomeCanvasItemClass *) text_item_class;
parent_class = gtk_type_class (gnome_canvas_item_get_type ());
iti_signals [TEXT_CHANGED] =
gtk_signal_new (
"text_changed",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusIconTextItemClass, text_changed),
gtk_marshal_BOOL__NONE,
GTK_TYPE_BOOL, 0);
iti_signals [TEXT_EDITED] =
gtk_signal_new (
"text_edited",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusIconTextItemClass, text_edited),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
iti_signals [HEIGHT_CHANGED] =
gtk_signal_new (
"height_changed",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusIconTextItemClass, height_changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
iti_signals [WIDTH_CHANGED] =
gtk_signal_new (
"width_changed",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusIconTextItemClass, width_changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
iti_signals[EDITING_STARTED] =
gtk_signal_new (
"editing_started",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusIconTextItemClass, editing_started),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
iti_signals[EDITING_STOPPED] =
gtk_signal_new (
"editing_stopped",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusIconTextItemClass, editing_stopped),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
iti_signals[SELECTION_STARTED] =
gtk_signal_new (
"selection_started",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusIconTextItemClass, selection_started),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
iti_signals[SELECTION_STOPPED] =
gtk_signal_new (
"selection_stopped",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusIconTextItemClass, selection_stopped),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, iti_signals, LAST_SIGNAL);
object_class->destroy = iti_destroy;
object_class->set_arg = iti_set_arg;
item_class->update = iti_update;
item_class->draw = iti_draw;
item_class->render = iti_render;
item_class->point = iti_point;
item_class->bounds = iti_bounds;
item_class->event = iti_event;
}
/* Object initialization function for the icon text item */
static void
iti_init (NautilusIconTextItem *iti)
{
ItiPrivate *priv;
priv = g_new0 (ItiPrivate, 1);
iti->priv = priv;
}
/**
* nautilus_icon_text_item_configure:
* @iti: An icon text item.
* @x: X position in which to place the item.
* @y: Y position in which to place the item.
* @width: Maximum width allowed for this item, to be used for word wrapping.
* @font: Name of the fontset that should be used to display the text.
* @text: Text that is going to be displayed.
* @is_editable: Deprecated.
* @is_static: Whether @text points to a static string or not.
*
* This routine is used to configure a &NautilusIconTextItem.
*
* @x and @y specify the cordinates where the item is placed inside the canvas.
* The @x coordinate should be the leftmost position that the icon text item can
* assume at any one time, that is, the left margin of the column in which the
* icon is to be placed. The @y coordinate specifies the top of the icon text
* item.
*
* @width is the maximum width allowed for this icon text item. The coordinates
* define the upper-left corner of an icon text item with maximum width; this may
* actually be outside the bounding box of the item if the text is narrower than
* the maximum width.
*
* If @is_static is true, it means that there is no need for the item to
* allocate memory for the string (it is a guarantee that the text is allocated
* by the caller and it will not be deallocated during the lifetime of this
* item). This is an optimization to reduce memory usage for large icon sets.
*/
void
nautilus_icon_text_item_configure (NautilusIconTextItem *iti, int x, int y,
int width, GdkFont *font,
const char *text, gboolean is_static)
{
ItiPrivate *priv;
GnomeIconTextInfo *min_text_info;
g_return_if_fail (iti != NULL);
g_return_if_fail (IS_ITI (iti));
g_return_if_fail (width > 2 * MARGIN_X);
g_return_if_fail (text != NULL);
priv = iti->priv;
iti->x = x;
iti->y = y;
iti->width = width;
if (iti->text && iti->is_text_allocated)
g_free (iti->text);
iti->is_text_allocated = !is_static;
/* This cast is to shut up the compiler */
if (is_static)
iti->text = (char *) text;
else
iti->text = g_strdup (text);
if (iti->font)
gdk_font_unref (iti->font);
iti->font = gdk_font_ref (font);
if (priv->font)
gdk_font_unref (priv->font);
priv->font = NULL;
if (font)
priv->font = gdk_font_ref (iti->font);
if (!priv->font)
priv->font = gdk_fontset_load (DEFAULT_FONT_NAME);
layout_text (iti);
/* Calculate and store min and max dimensions */
min_text_info = gnome_icon_layout_text (priv->font,
" ",
DEFAULT_SEPARATORS,
iti->width - 2 * MARGIN_X,
TRUE);
priv->min_width = min_text_info->width + 2 * MARGIN_X;
priv->min_height = min_text_info->height + 2 * MARGIN_Y;
gnome_icon_text_info_free(min_text_info);
priv->undo_registered = FALSE;
/* Request update */
priv->need_pos_update = TRUE;
priv->need_font_update = TRUE;
priv->need_text_update = TRUE;
gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (iti));
}
/**
* nautilus_icon_text_item_setxy:
* @iti: An icon text item.
* @x: X position.
* @y: Y position.
*
* Sets the coordinates at which the icon text item should be placed.
*
* See also: nautilus_icon_text_item_configure().
*/
void
nautilus_icon_text_item_setxy (NautilusIconTextItem *iti, int x, int y)
{
ItiPrivate *priv;
g_return_if_fail (iti != NULL);
g_return_if_fail (IS_ITI (iti));
priv = iti->priv;
iti->x = x;
iti->y = y;
priv->need_pos_update = TRUE;
gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (iti));
}
/**
* nautilus_icon_text_item_select:
* @iti: An icon text item
* @sel: Whether the icon text item should be displayed as selected.
*
* This function is used to control whether an icon text item is displayed as
* selected or not. Mouse events are ignored by the item when it is unselected;
* when the user clicks on a selected icon text item, it will start the text
* editing process.
*/
void
nautilus_icon_text_item_select (NautilusIconTextItem *iti, int sel)
{
ItiPrivate *priv;
g_return_if_fail (iti != NULL);
g_return_if_fail (IS_ITI (iti));
priv = iti->priv;
if (!iti->selected == !sel)
return;
iti->selected = sel ? TRUE : FALSE;
if (!iti->selected && iti->editing)
iti_edition_accept (iti);
priv->need_state_update = TRUE;
gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (iti));
}
/**
* nautilus_icon_text_item_set_text:
* @iti: An icon text item.
*
* Returns the current text string in an icon text item. The client should not
* free this string, as it is internal to the icon text item.
*/
void
nautilus_icon_text_item_set_text (NautilusIconTextItem *iti, const char *text)
{
ItiPrivate *priv;
g_return_if_fail (iti != NULL);
g_return_if_fail (IS_ITI (iti));
priv = iti->priv;
gtk_entry_set_text (GTK_ENTRY(priv->entry), text);
gtk_editable_select_region (GTK_EDITABLE (priv->entry), 0, -1);
layout_text (iti);
priv->need_text_update = TRUE;
gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (iti));
}
/**
* nautilus_icon_text_item_get_text:
* @iti: An icon text item.
*
* Returns the current text string in an icon text item. The client should not
* free this string, as it is internal to the icon text item.
*/
char *
nautilus_icon_text_item_get_text (NautilusIconTextItem *iti)
{
ItiPrivate *priv;
g_return_val_if_fail (iti != NULL, NULL);
g_return_val_if_fail (IS_ITI (iti), NULL);
priv = iti->priv;
if (iti->editing)
return gtk_entry_get_text (GTK_ENTRY(priv->entry));
else
return iti->text;
}
/**
* nautilus_icon_text_item_start_editing:
* @iti: An icon text item.
*
* Starts the editing state of an icon text item.
**/
void
nautilus_icon_text_item_start_editing (NautilusIconTextItem *iti)
{
ItiPrivate *priv;
g_return_if_fail (iti != NULL);
g_return_if_fail (IS_ITI (iti));
priv = iti->priv;
if (iti->editing)
return;
iti->selected = TRUE; /* Ensure that we are selected */
gnome_canvas_item_grab_focus (GNOME_CANVAS_ITEM (iti));
iti_start_editing (iti);
}
/**
* nautilus_icon_text_item_stop_editing:
* @iti: An icon text item.
* @accept: Whether to accept the current text or to discard it.
*
* Terminates the editing state of an icon text item. The @accept argument
* controls whether the item's current text should be accepted or discarded. If
* it is discarded, then the icon's original text will be restored.
**/
void
nautilus_icon_text_item_stop_editing (NautilusIconTextItem *iti,
gboolean accept)
{
ItiPrivate *priv;
g_return_if_fail (iti != NULL);
g_return_if_fail (IS_ITI (iti));
priv = iti->priv;
if (!iti->editing)
return;
if (accept) {
iti_edition_accept (iti);
} else {
iti_stop_editing (iti);
}
}
/**
* nautilus_icon_text_item_get_type:
* @void:
*
* Registers the &NautilusIconTextItem class if necessary, and returns the type ID
* associated to it.
*
* Return value: the type ID of the &NautilusIconTextItem class.
**/
GtkType
nautilus_icon_text_item_get_type (void)
{
static GtkType iti_type = 0;
if (!iti_type) {
static const GtkTypeInfo iti_info = {
"NautilusIconTextItem",
sizeof (NautilusIconTextItem),
sizeof (NautilusIconTextItemClass),
(GtkClassInitFunc) iti_class_init,
(GtkObjectInitFunc) iti_init,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
iti_type = gtk_type_unique (gnome_canvas_item_get_type (), &iti_info);
}
return iti_type;
}
/**
* nautilus_icon_text_item_get_margins:
* @void:
*
* Return the x and y margins of th etext item
**/
void
nautilus_icon_text_item_get_margins (int *x, int *y)
{
*x = MARGIN_X;
*y = MARGIN_Y;
}
/* register_undo
*
* Get text at start of edit operation and store in undo data as
* string with a key of "undo_text".
*/
static void
register_rename_undo (NautilusIconTextItem *item)
{
ItiPrivate *priv;
priv = item->priv;
nautilus_undo_register
(GTK_OBJECT (item),
restore_from_undo_snapshot_callback,
g_strdup (gtk_entry_get_text (GTK_ENTRY (priv->entry))),
(GDestroyNotify) g_free,
_("Rename"),
_("Undo Typing"),
_("Restore the old name"),
_("Redo Typing"),
_("Restore the changed name"));
}
/* restore_from_undo_snapshot_callback
*
* Restore edited text to data stored in undoable. Data is stored as
* a string with a key of "undo_text".
*/
static void
restore_from_undo_snapshot_callback (GtkObject *target, gpointer callback_data)
{
NautilusIconTextItem *item;
ItiPrivate *priv;
item = NAUTILUS_ICON_TEXT_ITEM (target);
priv = item->priv;
/* Register a new undo transaction for redo. */
register_rename_undo (item);
/* Restore the text. */
nautilus_icon_text_item_set_text (item, callback_data);
/* Reset the registered flag so we get a new item for future editing. */
priv->undo_registered = FALSE;
}
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