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|
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* nautilus-scalable-font.c - A GtkObject subclass for access to scalable fonts.
Copyright (C) 1999, 2000 Eazel, Inc.
The Gnome Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Gnome Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the Gnome Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Authors: Ramiro Estrugo <ramiro@eazel.com>
*/
#include <config.h>
#include "nautilus-scalable-font.h"
#include "nautilus-gtk-macros.h"
#include "nautilus-gdk-extensions.h"
#include "nautilus-gdk-pixbuf-extensions.h"
#include "nautilus-background.h"
#include "nautilus-string.h"
#include "nautilus-file-utilities.h"
#include "nautilus-glib-extensions.h"
#include "nautilus-string-map.h"
#include "nautilus-lib-self-check-functions.h"
#include <librsvg/rsvg-ft.h>
#include <libart_lgpl/art_misc.h>
#include <libart_lgpl/art_alphagamma.h>
#include <libart_lgpl/art_affine.h>
#include <librsvg/art_render.h>
#include <librsvg/art_render_mask.h>
#include <stdio.h>
#include <libgnome/gnome-util.h>
#include <ctype.h>
/* FontEntry */
typedef struct {
char *weight;
char *slant;
char *set_width;
RsvgFTFontHandle font_handle;
char *path;
} FontEntry;
/* FontFamilyEntry */
typedef struct {
char *family;
GList *fonts;
} FontFamilyEntry;
/* Detail member struct */
struct _NautilusScalableFontDetail
{
RsvgFTFontHandle font_handle;
};
/* Global things */
static GHashTable *global_font_family_table = NULL;
static RsvgFTCtx *global_rsvg_ft_context = NULL;
static NautilusScalableFont *global_default_font = NULL;
static NautilusStringMap *global_family_string_map = NULL;
static const RsvgFTFontHandle UNDEFINED_FONT_HANDLE = -1;
/* GtkObjectClass methods */
static void nautilus_scalable_font_initialize_class (NautilusScalableFontClass *font_class);
static void nautilus_scalable_font_initialize (NautilusScalableFont *font);
static void nautilus_scalable_font_destroy (GtkObject *object);
static void initialize_global_stuff_if_needed (void);
/* 'atexit' destructors for global stuff */
static void default_font_at_exit_destructor (void);
static void font_family_table_at_exit_destructor (void);
static void font_family_string_map_at_exit_destructor (void);
NAUTILUS_DEFINE_CLASS_BOILERPLATE (NautilusScalableFont, nautilus_scalable_font, GTK_TYPE_OBJECT)
/* Class init methods */
static void
nautilus_scalable_font_initialize_class (NautilusScalableFontClass *font_class)
{
GtkObjectClass *object_class = GTK_OBJECT_CLASS (font_class);
initialize_global_stuff_if_needed ();
/* GtkObjectClass */
object_class->destroy = nautilus_scalable_font_destroy;
}
void
nautilus_scalable_font_initialize (NautilusScalableFont *font)
{
font->detail = g_new (NautilusScalableFontDetail, 1);
font->detail->font_handle = UNDEFINED_FONT_HANDLE;
}
/* GtkObjectClass methods */
static void
nautilus_scalable_font_destroy (GtkObject *object)
{
NautilusScalableFont *font;
g_return_if_fail (object != NULL);
g_return_if_fail (NAUTILUS_IS_SCALABLE_FONT (object));
font = NAUTILUS_SCALABLE_FONT (object);
g_free (font->detail);
/* Chain destroy */
NAUTILUS_CALL_PARENT_CLASS (GTK_OBJECT_CLASS, destroy, (object));
}
static char *
file_as_string (const char *file_name)
{
struct stat stat_info;
FILE *stream;
char *result;
size_t num_read;
g_return_val_if_fail (file_name != NULL, NULL);
g_return_val_if_fail (g_file_exists (file_name), NULL);
if (stat (file_name, &stat_info) != 0) {
return NULL;
}
if (stat_info.st_size == 0) {
return NULL;
}
stream = fopen (file_name, "r");
if (!stream) {
return NULL;
}
result = g_malloc (sizeof (char) * stat_info.st_size + 1);
num_read = fread (result, sizeof (char), stat_info.st_size, stream);
fclose (stream);
if (num_read != stat_info.st_size) {
g_free (result);
return NULL;
}
result[stat_info.st_size] = '\0';
return result;
}
static gboolean
parse_font_description_file (const char *directory,
NautilusStringList **font_pfb_list_out,
NautilusStringList **font_xfld_list_out)
{
char *fonts_dir_path;
char *fonts_dir_content;
NautilusStringList *tokenized_list;
guint i;
gint count;
g_return_val_if_fail (directory != NULL, FALSE);
g_return_val_if_fail (g_file_exists (directory), FALSE);
g_return_val_if_fail (font_pfb_list_out != NULL, FALSE);
g_return_val_if_fail (font_xfld_list_out != NULL, FALSE);
*font_pfb_list_out = NULL;
*font_xfld_list_out = NULL;
fonts_dir_path = g_strdup_printf ("%s/%s", directory, "fonts.dir");
fonts_dir_content = file_as_string (fonts_dir_path);
g_free (fonts_dir_path);
if (fonts_dir_content == NULL) {
return FALSE;
}
tokenized_list = nautilus_string_list_new_from_tokens (fonts_dir_content, "\n", FALSE);
g_free (fonts_dir_content);
if (tokenized_list == NULL) {
return FALSE;
}
if (nautilus_string_list_get_length (tokenized_list) <= 1) {
nautilus_string_list_free (tokenized_list);
return FALSE;
}
if (!nautilus_eat_str_to_int (nautilus_string_list_nth (tokenized_list, 0), &count)) {
return FALSE;
}
*font_pfb_list_out = nautilus_string_list_new (FALSE);
*font_xfld_list_out = nautilus_string_list_new (FALSE);
for (i = 0; i < count; i++) {
char *line = nautilus_string_list_nth (tokenized_list, i + 1);
if (line != NULL) {
char *delimeter;
/* Look for the delimiting space */
delimeter = strstr (line, " ");
if (delimeter != NULL) {
char *font_pfb;
char *font_pfb_path;
guint pfb_length;
pfb_length = delimeter - line;
font_pfb = g_malloc (sizeof (char) * pfb_length + 1);
strncpy (font_pfb, line, pfb_length);
font_pfb[pfb_length] = '\0';
font_pfb_path = g_strdup_printf ("%s/%s", directory, font_pfb);
/* Make sure the pfb file exists */
if (g_file_exists (font_pfb_path)) {
while (isspace (*delimeter)) {
delimeter++;
}
nautilus_string_list_insert (*font_pfb_list_out, font_pfb_path);
nautilus_string_list_insert (*font_xfld_list_out, delimeter);
}
g_free (font_pfb);
g_free (font_pfb_path);
}
g_free (line);
}
}
nautilus_string_list_free (tokenized_list);
return TRUE;
}
/*
* FontEntry things
*/
static FontEntry*
font_entry_new (const char *weight,
const char *slant,
const char *set_width,
const char *path)
{
FontEntry *entry;
g_return_val_if_fail (weight != NULL, NULL);
g_return_val_if_fail (slant != NULL, NULL);
g_return_val_if_fail (set_width != NULL, NULL);
g_return_val_if_fail (path != NULL, NULL);
entry = g_new (FontEntry, 1);
entry->weight = g_strdup (weight);
entry->slant = g_strdup (slant);
entry->set_width = g_strdup (set_width);
entry->path = g_strdup (path);
entry->font_handle = UNDEFINED_FONT_HANDLE;
return entry;
}
static void
font_entry_free (FontEntry* entry)
{
g_return_if_fail (entry != NULL);
g_free (entry->weight);
g_free (entry->slant);
g_free (entry->set_width);
g_free (entry->path);
/* These fonts arent refcounted because they are catched internally by librsvg */
entry->font_handle = UNDEFINED_FONT_HANDLE;
g_free (entry);
}
/*
* FontFamilyEntry things
*/
static FontFamilyEntry*
font_family_new (const char *family)
{
FontFamilyEntry *entry;
g_return_val_if_fail (family != NULL, NULL);
entry = g_new (FontFamilyEntry, 1);
entry->family = g_strdup (family);
g_strdown (entry->family);
entry->fonts = NULL;
return entry;
}
static void
free_font_entry (gpointer data, gpointer user_data)
{
font_entry_free ((FontEntry*) data);
}
static void
font_family_free (FontFamilyEntry* entry)
{
g_return_if_fail (entry != NULL);
g_free (entry->family);
nautilus_g_list_free_deep_custom (entry->fonts, free_font_entry, NULL);
entry->fonts = NULL;
g_free (entry);
}
static void
font_family_insert_font (FontFamilyEntry *family_entry, FontEntry *font_entry)
{
g_return_if_fail (family_entry != NULL);
g_return_if_fail (font_entry != NULL);
family_entry->fonts = g_list_append (family_entry->fonts, (gpointer) font_entry);
}
#define EQUAL 0
#define NOT_EQUAL 1
static gint
font_compare (gconstpointer a, gconstpointer b)
{
FontEntry *font_entry_a = (FontEntry *) a;
FontEntry *font_entry_b = (FontEntry *) b;
g_return_val_if_fail (font_entry_a != NULL, NOT_EQUAL);
g_return_val_if_fail (font_entry_b != NULL, NOT_EQUAL);
g_return_val_if_fail (font_entry_a->weight != NULL, NOT_EQUAL);
g_return_val_if_fail (font_entry_a->slant != NULL, NOT_EQUAL);
g_return_val_if_fail (font_entry_a->set_width != NULL, NOT_EQUAL);
g_return_val_if_fail (font_entry_b->weight != NULL, NOT_EQUAL);
g_return_val_if_fail (font_entry_b->slant != NULL, NOT_EQUAL);
g_return_val_if_fail (font_entry_b->set_width != NULL, NOT_EQUAL);
return (nautilus_str_is_equal (font_entry_a->weight, font_entry_b->weight)
&& nautilus_str_is_equal (font_entry_a->slant, font_entry_b->slant)
&& nautilus_str_is_equal (font_entry_a->set_width, font_entry_b->set_width)) ? EQUAL : NOT_EQUAL;
}
static FontEntry*
font_family_find_font (const FontFamilyEntry *family_entry,
const char *weight,
const char *slant,
const char *set_width)
{
FontEntry fake_font_entry;
GList *node;
g_return_val_if_fail (family_entry != NULL, NULL);
g_return_val_if_fail (weight != NULL, NULL);
g_return_val_if_fail (slant != NULL, NULL);
g_return_val_if_fail (set_width != NULL, NULL);
fake_font_entry.weight = (char *) weight;
fake_font_entry.slant = (char *) slant;
fake_font_entry.set_width = (char *) set_width;
node = g_list_find_custom (family_entry->fonts, &fake_font_entry, font_compare);
return node ? node->data : NULL;
}
static FontFamilyEntry *
font_family_lookup (GHashTable *font_family_table, const char *family)
{
gpointer value;
g_return_val_if_fail (font_family_table != NULL, NULL);
g_return_val_if_fail (family != NULL, NULL);
value = g_hash_table_lookup (font_family_table, (gconstpointer) family);
return (FontFamilyEntry *) value;
}
static FontFamilyEntry *
font_family_lookup_with_insertion (GHashTable *font_family_table, const char *family)
{
FontFamilyEntry *entry;
g_return_val_if_fail (font_family_table != NULL, NULL);
g_return_val_if_fail (family != NULL, NULL);
entry = g_hash_table_lookup (font_family_table, (gconstpointer) family);
if (entry == NULL) {
entry = font_family_new (family);
g_hash_table_insert (font_family_table, entry->family, entry);
}
return entry;
}
static void
font_family_table_add_fonts (GHashTable *font_family_table, const char *font_path)
{
NautilusStringList *font_pfb_list = NULL;
NautilusStringList *font_xfld_list = NULL;
guint i;
g_return_if_fail (font_family_table != NULL);
g_return_if_fail (font_path != NULL);
if (!g_file_exists (font_path)) {
return;
}
if (!parse_font_description_file (font_path, &font_pfb_list, &font_xfld_list)) {
return;
}
if (nautilus_string_list_get_length (font_pfb_list) != nautilus_string_list_get_length (font_xfld_list)) {
nautilus_string_list_free (font_pfb_list);
nautilus_string_list_free (font_xfld_list);
return;
}
for (i = 0; i < nautilus_string_list_get_length (font_pfb_list); i++) {
NautilusStringList *tokenized_xfld;
char *path;
char *xfld;
char *foundry;
char *family;
char *weight;
char *slant;
char *set_width;
FontFamilyEntry *family_entry;
FontEntry *font_entry;
path = nautilus_string_list_nth (font_pfb_list, i);
g_assert (path != NULL);
xfld = nautilus_string_list_nth (font_xfld_list, i);
g_assert (xfld != NULL);
tokenized_xfld = nautilus_string_list_new_from_tokens (xfld, "-", FALSE);
foundry = nautilus_string_list_nth (tokenized_xfld, 1);
family = nautilus_string_list_nth (tokenized_xfld, 2);
g_strdown (family);
weight = nautilus_string_list_nth (tokenized_xfld, 3);
slant = nautilus_string_list_nth (tokenized_xfld, 4);
set_width = nautilus_string_list_nth (tokenized_xfld, 5);
family_entry = font_family_lookup_with_insertion (font_family_table, family);
g_assert (family_entry != NULL);
font_entry = font_family_find_font (family_entry, weight, slant, set_width);
if (font_entry != NULL) {
g_warning ("Dude, the font '%s-%s-%s-%s' already exists", family, weight, slant, set_width);
}
else {
font_entry = font_entry_new (weight, slant, set_width, path);
font_family_insert_font (family_entry, font_entry);
}
nautilus_string_list_free (tokenized_xfld);
g_free (foundry);
g_free (family);
g_free (weight);
g_free (slant);
g_free (set_width);
g_free (path);
g_free (xfld);
}
nautilus_string_list_free (font_pfb_list);
nautilus_string_list_free (font_xfld_list);
}
static NautilusStringMap *
font_family_string_map_new (void)
{
NautilusStringMap *map;
map = nautilus_string_map_new (FALSE);
/*
* The idea behind the family map here is that users of NautilusScalableFont
* dont need to know what the exact name of the font is.
*
* For example, old urw fonts use the name 'helvetica', but newer ones use
* 'numbus sans l'
*
* So, we a map for 'helvetica' to 'nimbus sans l' if needed.
*
* Of course, specifying the font by its exact name will continue to work.
*/
if (font_family_lookup (global_font_family_table, "nimbus sans l")) {
nautilus_string_map_add (map, "nimbus sans l", "helvetica");
}
else if (font_family_lookup (global_font_family_table, "helvetica")) {
nautilus_string_map_add (map, "helvetica", "nimbus sans l");
}
return map;
}
/* Public NautilusScalableFont methods */
GtkObject*
nautilus_scalable_font_new (const char *family,
const char *weight,
const char *slant,
const char *set_width)
{
/* const char *foundry = "URW"; */
FontFamilyEntry *family_entry;
FontEntry *font_entry;
NautilusScalableFont *font;
initialize_global_stuff_if_needed ();
family_entry = font_family_lookup (global_font_family_table, family);
/* If the family entry was not found, try a mapped family name */
if (family_entry == NULL) {
char *mapped_family;
mapped_family = nautilus_string_map_lookup (global_family_string_map, family);
if (mapped_family != NULL) {
family_entry = font_family_lookup (global_font_family_table, mapped_family);
g_free (mapped_family);
}
}
if (family_entry == NULL) {
g_warning ("There is no such font: %s", family);
return NULL;
}
weight = weight ? weight : "medium";
slant = slant ? slant : "r";
set_width = set_width ? set_width : "normal";
font_entry = font_family_find_font (family_entry, weight, slant, set_width);
if (font_entry == NULL) {
g_warning ("There is no such font '%s-%s-%s-%s'", family, weight, slant, set_width);
return NULL;
}
/* 'Intern' the rsvg font handle if needed */
if (font_entry->font_handle == UNDEFINED_FONT_HANDLE) {
font_entry->font_handle = rsvg_ft_intern (global_rsvg_ft_context, font_entry->path);
}
#if 0
g_print ("%s (%s, %s, %s %s) handle = %d\n" ,
__FUNCTION__, family, weight, slant, set_width, font_entry->font_handle);
#endif
font = NAUTILUS_SCALABLE_FONT (gtk_object_new (nautilus_scalable_font_get_type (), NULL));
gtk_object_ref (GTK_OBJECT (font));
gtk_object_sink (GTK_OBJECT (font));
font->detail->font_handle = font_entry->font_handle;
return GTK_OBJECT (font);
}
void
nautilus_scalable_font_measure_text (const NautilusScalableFont *font,
guint font_width,
guint font_height,
const char *text,
guint text_length,
guint *text_width_out,
guint *text_height_out)
{
RsvgFTGlyph *glyph;
double affine[6];
int glyph_xy[2];
g_return_if_fail (NAUTILUS_IS_SCALABLE_FONT (font));
g_return_if_fail (text_width_out != NULL);
g_return_if_fail (text_height_out != NULL);
g_return_if_fail (font_width > 0);
g_return_if_fail (font_height > 0);
*text_width_out = 0;
*text_height_out = 0;
if (text == NULL || text[0] == '\0' || text_length == 0) {
return;
}
g_return_if_fail (text_length <= strlen (text));
art_affine_identity (affine);
/* FIXME bugzilla.eazel.com 2544: We need to change rsvg_ft_render_string() to accept
* a 'do_render' flag so that we can use to to compute metrics
* without actually having to render
*/
glyph = rsvg_ft_render_string (global_rsvg_ft_context,
font->detail->font_handle,
text,
text_length,
font_width,
font_height,
affine,
glyph_xy);
g_assert (glyph != NULL);
*text_width_out = glyph->width;
*text_height_out = glyph->height;
rsvg_ft_glyph_unref (glyph);
}
guint
nautilus_scalable_font_text_width (const NautilusScalableFont *font,
guint font_width,
guint font_height,
const char *text,
guint text_length)
{
guint text_width = 0;
guint text_height = 0;
g_return_val_if_fail (NAUTILUS_IS_SCALABLE_FONT (font), 0);
g_return_val_if_fail (font_width > 0, 0);
g_return_val_if_fail (font_height > 0, 0);
if (text == NULL || text[0] == '\0' || text_length == 0) {
return 0;
}
g_return_val_if_fail (text_length <= strlen (text), 0);
nautilus_scalable_font_measure_text (font,
font_width,
font_height,
text,
text_length,
&text_width,
&text_height);
return text_width;
}
/* Lifted from Raph's test-ft-gtk.c sample program */
static void
invert_glyph (guchar *buf, int rowstride, int width, int height)
{
int x, y;
int first;
int n_words;
int last;
guint32 *middle;
if (width >= 8 && ((rowstride & 3) == 0)) {
first = (-(long)buf) & 3;
n_words = (width - first) >> 2;
last = first + (n_words << 2);
for (y = 0; y < height; y++) {
middle = (guint32 *)(buf + first);
for (x = 0; x < first; x++)
buf[x] = ~buf[x];
for (x = 0; x < n_words; x++)
middle[x] = ~middle[x];
for (x = last; x < width; x++)
buf[x] = ~buf[x];
buf += rowstride;
}
} else {
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++)
buf[x] = ~buf[x];
buf += rowstride;
}
}
}
void
nautilus_scalable_font_draw_text (const NautilusScalableFont *font,
GdkPixbuf *destination_pixbuf,
int x,
int y,
const ArtIRect *clip_area,
guint font_width,
guint font_height,
const char *text,
guint text_length,
guint32 color,
guchar overall_alpha,
gboolean inverted)
{
RsvgFTGlyph *glyph;
double affine[6];
int glyph_xy[2];
ArtIRect render_area;
ArtIRect glyph_area;
g_return_if_fail (NAUTILUS_IS_SCALABLE_FONT (font));
g_return_if_fail (destination_pixbuf != NULL);
g_return_if_fail (font_width > 0);
g_return_if_fail (font_height > 0);
if (text == NULL || text[0] == '\0' || text_length == 0) {
return;
}
g_return_if_fail (text_length <= strlen (text));
if (clip_area != NULL) {
g_return_if_fail (clip_area->x1 > clip_area->x0);
g_return_if_fail (clip_area->y1 > clip_area->y0);
}
art_affine_identity (affine);
/* Make a glyph for the given string */
glyph = rsvg_ft_render_string (global_rsvg_ft_context,
font->detail->font_handle,
text,
text_length,
font_width,
font_height,
affine,
glyph_xy);
g_assert (glyph != NULL);
glyph_xy[0] = 0;
glyph_xy[1] = 0;
glyph_area.x0 = glyph_xy[0];
glyph_area.y0 = glyph_xy[1];
glyph_area.x1 = glyph_area.x0 + glyph->width;
glyph_area.y1 = glyph_area.y0 + glyph->height;
/* Invert the glyph if needed */
if (inverted) {
ArtIRect invert_area;
if (clip_area != NULL) {
art_irect_intersect (&invert_area, &glyph_area, clip_area);
}
else {
invert_area = glyph_area;
}
if (!art_irect_empty (&invert_area)) {
guchar *glyph_pixels;
guint glyph_rowstride;
glyph_rowstride = glyph->rowstride;
glyph_pixels = glyph->buf;
glyph_pixels =
glyph->buf +
(invert_area.x0 - glyph_area.x0) +
glyph_rowstride * (invert_area.y0 - glyph_area.y0);
invert_glyph (glyph_pixels,
glyph_rowstride,
invert_area.x1 - invert_area.x0,
invert_area.y1 - invert_area.y0);
}
}
/* Translate the glyph area to the (x,y) where its to be rendered */
glyph_area.x0 += x;
glyph_area.y0 += y;
glyph_area.x1 += x;
glyph_area.y1 += y;
/* Clip the glyph_area against the clip_area if needed */
if (clip_area != NULL) {
art_irect_intersect (&render_area, &glyph_area, clip_area);
}
else {
render_area = glyph_area;
}
/* Render the glyph */
if (!art_irect_empty (&render_area)) {
guint pixbuf_width;
guint pixbuf_height;
guint pixbuf_rowstride;
guchar *pixbuf_pixels;
ArtRender *art_render;
ArtPixMaxDepth art_color_array[3];
ArtAlphaType alpha_type;
pixbuf_width = gdk_pixbuf_get_width (destination_pixbuf);
pixbuf_height = gdk_pixbuf_get_height (destination_pixbuf);
pixbuf_rowstride = gdk_pixbuf_get_rowstride (destination_pixbuf);
pixbuf_pixels = gdk_pixbuf_get_pixels (destination_pixbuf);
alpha_type = gdk_pixbuf_get_has_alpha (destination_pixbuf) ?
ART_ALPHA_SEPARATE :
ART_ALPHA_NONE;
art_render = art_render_new (0,
0,
pixbuf_width,
pixbuf_height,
pixbuf_pixels,
pixbuf_rowstride,
3,
8,
alpha_type,
NULL);
art_color_array[0] = ART_PIX_MAX_FROM_8 (NAUTILUS_RGBA_COLOR_GET_R (color));
art_color_array[1] = ART_PIX_MAX_FROM_8 (NAUTILUS_RGBA_COLOR_GET_G (color));
art_color_array[2] = ART_PIX_MAX_FROM_8 (NAUTILUS_RGBA_COLOR_GET_B (color));
art_render_image_solid (art_render, art_color_array);
art_render_mask (art_render,
render_area.x0,
render_area.y0,
render_area.x1,
render_area.y1,
glyph->buf,
glyph->rowstride);
art_render_invoke (art_render);
}
rsvg_ft_glyph_unref (glyph);
}
void
nautilus_scalable_font_measure_text_lines (const NautilusScalableFont *font,
guint font_width,
guint font_height,
const char *text,
guint num_text_lines,
double empty_line_height,
guint text_line_widths[],
guint text_line_heights[],
guint *max_width_out,
guint *total_height_out)
{
guint i;
const char *line;
g_return_if_fail (NAUTILUS_IS_SCALABLE_FONT (font));
g_return_if_fail (font_width > 0);
g_return_if_fail (font_height > 0);
g_return_if_fail (text != NULL);
g_return_if_fail (text_line_widths != NULL);
g_return_if_fail (text_line_heights != NULL);
g_return_if_fail (num_text_lines > 0);
g_return_if_fail (num_text_lines <= (nautilus_str_count_characters (text, '\n') + 1));
if (max_width_out != NULL) {
*max_width_out = 0;
}
if (total_height_out != NULL) {
*total_height_out = 0;
}
line = text;
/*
* We can safely iterate for 'num_text_lines' since we already checked that the
* string does indeed contain as many lines.
*/
for (i = 0; i < num_text_lines; i++) {
const char *next_new_line;
guint length;
g_assert (line != NULL);
/* Look for the next new line */
next_new_line = strchr (line, '\n');
if (next_new_line != NULL) {
length = (next_new_line - line);
}
else {
length = strlen (line);
}
/* Deal with empty lines */
if (length == 0) {
text_line_widths[i] = 0;
text_line_heights[i] = empty_line_height;
}
else {
nautilus_scalable_font_measure_text (font,
font_width,
font_height,
line,
length,
&text_line_widths[i],
&text_line_heights[i]);
}
if (next_new_line != NULL) {
line = next_new_line + 1;
}
else {
line = NULL;
}
/* Keep track of total height */
if (total_height_out != NULL) {
*total_height_out += text_line_heights[i];
}
/* Keep track of max width */
if ((max_width_out != NULL) && (text_line_widths[i] > *max_width_out)) {
*max_width_out = text_line_widths[i];
}
}
}
void
nautilus_scalable_font_draw_text_lines_with_dimensions (const NautilusScalableFont *font,
GdkPixbuf *destination_pixbuf,
int x,
int y,
const ArtIRect *clip_area,
guint font_width,
guint font_height,
const char *text,
guint num_text_lines,
const guint *text_line_widths,
const guint *text_line_heights,
GtkJustification justification,
guint line_offset,
double empty_line_height,
guint32 color,
guchar overall_alpha,
gboolean inverted)
{
guint i;
const char *line;
guint available_width;
guint available_height;
// guint max_num_text_lines;
g_return_if_fail (NAUTILUS_IS_SCALABLE_FONT (font));
g_return_if_fail (destination_pixbuf != NULL);
g_return_if_fail (clip_area != NULL);
g_return_if_fail (font_width > 0);
g_return_if_fail (font_height > 0);
g_return_if_fail (justification >= GTK_JUSTIFY_LEFT && justification <= GTK_JUSTIFY_FILL);
g_return_if_fail (clip_area->x1 > clip_area->x0);
g_return_if_fail (clip_area->y1 > clip_area->y0);
g_return_if_fail (num_text_lines > 0);
g_return_if_fail (num_text_lines <= (nautilus_str_count_characters (text, '\n') + 1));
g_return_if_fail (text_line_widths != NULL);
g_return_if_fail (text_line_widths != NULL);
available_width = clip_area->x1 - clip_area->x0;
available_height = clip_area->y1 - clip_area->y0;
// max_num_text_lines = (available_height / font_height);
line = text;
/*
* We can safely iterate for 'num_text_lines' since we already checked that the
* string does indeed contain as many lines.
*/
for (i = 0; i < num_text_lines; i++) {
const char *next_new_line;
guint length;
g_assert (line != NULL);
/* Look for the next new line */
next_new_line = strchr (line, '\n');
if (next_new_line != NULL) {
length = (next_new_line - line);
}
else {
length = strlen (line);
}
/* Deal with empty lines */
if (length == 0) {
y += (line_offset + text_line_heights[i]);
}
else {
int text_x;
int text_y;
switch (justification) {
case GTK_JUSTIFY_LEFT:
text_x = x;
break;
case GTK_JUSTIFY_CENTER:
case GTK_JUSTIFY_FILL:
if (text_line_widths[i] <= available_width) {
text_x = x + ((available_width - text_line_widths[i]) / 2);
}
else {
text_x = x - ((text_line_widths[i] - available_width) / 2);
}
break;
case GTK_JUSTIFY_RIGHT:
text_x = x + available_width - text_line_widths[i];
break;
default:
g_assert_not_reached ();
text_x = 0;
}
text_y = y;
nautilus_scalable_font_draw_text (font,
destination_pixbuf,
text_x,
text_y,
clip_area,
font_width,
font_height,
line,
length,
color,
overall_alpha,
inverted);
y += (line_offset + text_line_heights[i]);
}
if (next_new_line != NULL) {
line = next_new_line + 1;
}
else {
line = NULL;
}
}
}
void
nautilus_scalable_font_draw_text_lines (const NautilusScalableFont *font,
GdkPixbuf *destination_pixbuf,
int x,
int y,
const ArtIRect *clip_area,
guint font_width,
guint font_height,
const char *text,
GtkJustification justification,
guint line_offset,
double empty_line_height,
guint32 color,
guchar overall_alpha,
gboolean inverted)
{
guint num_text_lines;
guint *text_line_widths;
guint *text_line_heights;
g_return_if_fail (NAUTILUS_IS_SCALABLE_FONT (font));
g_return_if_fail (destination_pixbuf != NULL);
g_return_if_fail (clip_area != NULL);
g_return_if_fail (font_width > 0);
g_return_if_fail (font_height > 0);
g_return_if_fail (justification >= GTK_JUSTIFY_LEFT && justification <= GTK_JUSTIFY_FILL);
g_return_if_fail (clip_area->x1 > clip_area->x0);
g_return_if_fail (clip_area->y1 > clip_area->y0);
if (text == NULL || text[0] == '\0') {
return;
}
/* FIXME bugzilla.eazel.com 2785: We need to optimize this code to measure a minimum
* number of text lines. We need to look at the clip rectangle and compute the
* maximum number of text lines that actually fit.
*/
num_text_lines = nautilus_str_count_characters (text, '\n') + 1;
text_line_widths = g_new (guint, num_text_lines);
text_line_heights = g_new (guint, num_text_lines);
nautilus_scalable_font_measure_text_lines (font,
font_width,
font_height,
text,
num_text_lines,
empty_line_height,
text_line_widths,
text_line_heights,
NULL,
NULL);
nautilus_scalable_font_draw_text_lines_with_dimensions (font,
destination_pixbuf,
x,
y,
clip_area,
font_width,
font_height,
text,
num_text_lines,
text_line_widths,
text_line_heights,
justification,
line_offset,
empty_line_height,
color,
overall_alpha,
inverted);
g_free (text_line_widths);
g_free (text_line_heights);
}
guint
nautilus_scalable_font_largest_fitting_font_size (const NautilusScalableFont *font,
const char *text,
guint available_width,
const guint font_sizes[],
guint num_font_sizes)
{
NautilusStringList *tokenized_string;
guint i;
char *longest_string;
guint longest_string_length;
g_return_val_if_fail (NAUTILUS_IS_SCALABLE_FONT (font), 0);
g_return_val_if_fail (font_sizes != NULL, 0);
g_return_val_if_fail (num_font_sizes > 0, 0);
if (text == NULL || text[0] == '\0' || available_width < 1) {
return font_sizes[num_font_sizes - 1];
}
tokenized_string = nautilus_string_list_new_from_tokens (text, "\n", FALSE);
longest_string = nautilus_string_list_get_longest_string (tokenized_string);
g_assert (longest_string != NULL);
nautilus_string_list_free (tokenized_string);
longest_string_length = strlen (longest_string);
for (i = 0; i < num_font_sizes; i++) {
guint text_width;
guint text_height;
nautilus_scalable_font_measure_text (font,
font_sizes[i],
font_sizes[i],
longest_string,
longest_string_length,
&text_width,
&text_height);
if (text_width <= available_width) {
g_free (longest_string);
return font_sizes[i];
}
}
g_free (longest_string);
return font_sizes[num_font_sizes - 1];
}
NautilusScalableFont *
nautilus_scalable_font_get_default_font (void)
{
if (global_default_font == NULL) {
global_default_font = NAUTILUS_SCALABLE_FONT (nautilus_scalable_font_new ("helvetica", NULL, NULL, NULL));
g_assert (global_default_font != NULL);
g_atexit (default_font_at_exit_destructor);
}
gtk_object_ref (GTK_OBJECT (global_default_font));
return global_default_font;
}
static void
font_family_table_for_each_append (gpointer key,
gpointer value,
gpointer user_data)
{
NautilusStringList *list = (NautilusStringList *) user_data;
FontFamilyEntry *family_entry = (FontFamilyEntry *) value;
g_assert (family_entry != NULL);
g_assert (!nautilus_string_list_contains (list, family_entry->family));
nautilus_string_list_insert (list, family_entry->family);
}
static void
font_family_table_for_each_free (gpointer key,
gpointer value,
gpointer user_data)
{
FontFamilyEntry *family_entry = (FontFamilyEntry *) value;
g_assert (family_entry != NULL);
font_family_free (family_entry);
}
static NautilusStringList *
font_family_table_get_family_list (GHashTable *font_family_table)
{
NautilusStringList *list;
g_return_val_if_fail (font_family_table != NULL, NULL);
list = nautilus_string_list_new (FALSE);
g_hash_table_foreach (font_family_table, font_family_table_for_each_append, list);
return list;
}
NautilusStringList *
nautilus_scalable_font_get_font_family_list (void)
{
initialize_global_stuff_if_needed ();
return font_family_table_get_family_list (global_font_family_table);
}
static void
font_family_table_free (GHashTable *font_family_table)
{
g_assert (font_family_table != NULL);
g_hash_table_foreach (font_family_table, font_family_table_for_each_free, NULL);
g_hash_table_destroy (font_family_table);
}
gboolean
nautilus_scalable_font_query_font (const char *family,
NautilusStringList **weights_out,
NautilusStringList **slants_out,
NautilusStringList **set_widths_out)
{
FontFamilyEntry *family_entry;
GList *iterator;
g_return_val_if_fail (family != NULL, FALSE);
if (weights_out != NULL) {
*weights_out = NULL;
}
if (slants_out != NULL) {
*slants_out = NULL;
}
if (set_widths_out != NULL) {
*set_widths_out = NULL;
}
family_entry = font_family_lookup (global_font_family_table, family);
if (family_entry == NULL) {
return FALSE;
}
if (weights_out == NULL && slants_out == NULL && set_widths_out == NULL) {
return TRUE;
}
if (weights_out != NULL) {
*weights_out = nautilus_string_list_new (FALSE);
}
if (slants_out != NULL) {
*slants_out = nautilus_string_list_new (FALSE);
}
if (set_widths_out != NULL) {
*set_widths_out = nautilus_string_list_new (FALSE);
}
for (iterator = family_entry->fonts; iterator != NULL; iterator = iterator->next) {
FontEntry *font_entry = (FontEntry *) iterator->data;
g_assert (font_entry != NULL);
if (weights_out != NULL) {
nautilus_string_list_insert (*weights_out, font_entry->weight);
}
if (slants_out != NULL) {
nautilus_string_list_insert (*slants_out, font_entry->slant);
}
if (set_widths_out != NULL) {
nautilus_string_list_insert (*set_widths_out, font_entry->set_width);
}
}
return TRUE;
}
#if 0
static const char * global_default_font_path[] =
{
"/usr/lib/X11/fonts/Type1",
"/usr/share/fonts/default/Type1"
};
#endif
/* 'atexit' destructors for global stuff */
static void
destroy_global_rsvg_ft_context (void)
{
rsvg_ft_ctx_done (global_rsvg_ft_context);
}
static void
default_font_at_exit_destructor (void)
{
gtk_object_unref (GTK_OBJECT (global_default_font));
}
static void
font_family_table_at_exit_destructor (void)
{
font_family_table_free (global_font_family_table);
}
static void
font_family_string_map_at_exit_destructor (void)
{
nautilus_string_map_free (global_family_string_map);
}
static void
initialize_global_stuff_if_needed (void)
{
static gboolean fonts_initialized = FALSE;
/* Initialize the rsvg font context shared by all fonts */
if (global_rsvg_ft_context == NULL) {
global_rsvg_ft_context = rsvg_ft_ctx_new ();
g_atexit (destroy_global_rsvg_ft_context);
}
/* Initialize the global font table */
if (fonts_initialized == FALSE) {
fonts_initialized = TRUE;
global_font_family_table = g_hash_table_new (g_str_hash, g_str_equal);
#if TYPE1_FONT_DIR_EXISTS
font_family_table_add_fonts (global_font_family_table, "/usr/share/fonts/default/Type1");
#else
font_family_table_add_fonts (global_font_family_table, NAUTILUS_DATADIR "/fonts/urw");
#endif
g_atexit (font_family_table_at_exit_destructor);
}
if (global_family_string_map == NULL) {
global_family_string_map = font_family_string_map_new ();
g_atexit (font_family_string_map_at_exit_destructor);
}
}
/*
* The following text_layout stuff was shamelessly plundered
* from libgnomeui/gnome-icon-text.[ch] by Federico Mena.
*
* It was hacked to use NautilusScalableFont and GdkPixbuf
* instead of GdkFont and GdkDrawable. We want to use the
* same layout algorithm in Nautilus so that both the smooth
* and not smooth text rendering cases have predictably
* similar result.
*
* I also made some minor Nautilus-like style changes. -re
*
*/
static void
text_layout_free_row (gpointer data, gpointer user_data)
{
NautilusTextLayoutRow *row;
if (data) {
row = data;
g_free (row->text);
g_free (row);
}
}
/**
* nautilus_text_layout_free:
* @ti: An icon text info structure.
*
* Frees a &NautilusTextLayout structure. You should call this instead of
* freeing the structure yourself.
*/
void
nautilus_text_layout_free (NautilusTextLayout *text_layout)
{
g_list_foreach (text_layout->rows, text_layout_free_row, NULL);
g_list_free (text_layout->rows);
g_free (text_layout);
}
/**
* nautilus_text_layout_new:
* @font: Name of the font that will be used to render the text.
* @text: Text to be formatted.
* @separators: Separators used for word wrapping, can be NULL.
* @max_width: Width in pixels to be used for word wrapping.
* @confine: Whether it is mandatory to wrap at @max_width.
*
* Creates a new &NautilusTextLayout structure by wrapping the specified
* text. If non-NULL, the @separators argument defines a set of characters
* to be used as word delimiters for performing word wrapping. If it is
* NULL, then only spaces will be used as word delimiters.
*
* The @max_width argument is used to specify the width at which word
* wrapping will be performed. If there is a very long word that does not
* fit in a single line, the @confine argument can be used to specify
* whether the word should be unconditionally split to fit or whether
* the maximum width should be increased as necessary.
*
* Return value: A newly-created &NautilusTextLayout structure.
*/
NautilusTextLayout *
nautilus_text_layout_new (const NautilusScalableFont *font,
guint font_size,
const char *text,
const char *separators,
int max_width,
gboolean confine)
{
NautilusTextLayout *text_layout;
NautilusTextLayoutRow *row;
const char *row_end;
const char *s, *word_start, *word_end, *old_word_end;
char *sub_text;
int i, w_len, w;
const char *text_iter;
int text_len, separators_len;
g_return_val_if_fail (font != NULL, NULL);
g_return_val_if_fail (font_size > 0, NULL);
g_return_val_if_fail (text != NULL, NULL);
g_return_val_if_fail (nautilus_strlen (text) > 0, NULL);
if (!separators)
separators = " ";
text_len = strlen (text);
separators_len = strlen (separators);
text_layout = g_new (NautilusTextLayout, 1);
text_layout->rows = NULL;
text_layout->font = font;
text_layout->font_size = font_size;
text_layout->width = 0;
text_layout->height = 0;
text_layout->baseline_skip = font_size;
word_end = NULL;
text_iter = text;
while (*text_iter) {
for (row_end = text_iter; *row_end != 0 && *row_end != '\n'; row_end++);
/* Accumulate words from this row until they don't fit in the max_width */
s = text_iter;
while (s < row_end) {
word_start = s;
old_word_end = word_end;
for (word_end = word_start; *word_end; word_end++) {
const char *p;
for (p = separators; *p; p++) {
if (*word_end == *p)
goto found;
}
}
found:
if (word_end < row_end)
word_end++;
if (nautilus_scalable_font_text_width (font, font_size, font_size, text_iter, word_end - text_iter) > max_width) {
if (word_start == text_iter) {
if (confine) {
/* We must force-split the word. Look for a proper
* place to do it.
*/
w_len = word_end - word_start;
for (i = 1; i < w_len; i++) {
w = nautilus_scalable_font_text_width (font, font_size, font_size, word_start, i);
if (w > max_width) {
if (i == 1)
/* Shit, not even a single character fits */
max_width = w;
else
break;
}
}
/* Create sub-row with the chars that fit */
sub_text = g_new (char, i);
memcpy (sub_text, word_start, (i - 1) * sizeof (char));
sub_text[i - 1] = 0;
row = g_new (NautilusTextLayoutRow, 1);
row->text = sub_text;
row->text_length = i - 1;
row->width = nautilus_scalable_font_text_width (font, font_size, font_size,
sub_text,
strlen (sub_text));
if (row->text == NULL) {
row->text = g_strdup("");
}
text_layout->rows = g_list_append (text_layout->rows, row);
if (row->width > text_layout->width)
text_layout->width = row->width;
text_layout->height += text_layout->baseline_skip;
/* Bump the text pointer */
text_iter += i - 1;
s = text_iter;
continue;
} else
max_width = nautilus_scalable_font_text_width (font, font_size, font_size, word_start, word_end - word_start);
continue; /* Retry split */
} else {
word_end = old_word_end; /* Restore to region that does fit */
break; /* Stop the loop because we found something that doesn't fit */
}
}
s = word_end;
}
/* Append row */
if (text_iter == row_end) {
/* We are on a newline, so append an empty row */
text_layout->rows = g_list_append (text_layout->rows, NULL);
text_layout->height += text_layout->baseline_skip / 2;
/* Next! */
text_iter = row_end + 1;
} else {
/* Create subrow and append it to the list */
int sub_len;
sub_len = word_end - text_iter;
sub_text = g_new (char, sub_len + 1);
memcpy (sub_text, text_iter, sub_len * sizeof (char));
sub_text[sub_len] = 0;
row = g_new (NautilusTextLayoutRow, 1);
row->text = sub_text;
row->text_length = sub_len;
row->width = nautilus_scalable_font_text_width (font, font_size, font_size, sub_text, sub_len);
if (row->text == NULL) {
row->text = g_strdup("");
}
text_layout->rows = g_list_append (text_layout->rows, row);
if (row->width > text_layout->width)
text_layout->width = row->width;
text_layout->height += text_layout->baseline_skip;
/* Next! */
text_iter = word_end;
}
}
return text_layout;
}
/**
* nautilus_text_layout_paint:
* @ti: An icon text info structure.
* @drawable: Target drawable.
* @gc: GC used to render the string.
* @x: Left coordinate for text.
* @y: Upper coordinate for text.
* @just: Justification for text.
*
* Paints the formatted text in the icon text info structure onto a drawable.
* This is just a sample implementation; applications can choose to use other
* rendering functions.
*/
void
nautilus_text_layout_paint (const NautilusTextLayout *text_layout,
GdkPixbuf *destination_pixbuf,
int x,
int y,
GtkJustification justification,
guint32 color,
gboolean inverted,
gboolean underlined)
{
GList *item;
const NautilusTextLayoutRow *row;
int xpos;
g_return_if_fail (text_layout != NULL);
g_return_if_fail (destination_pixbuf != NULL);
g_return_if_fail (justification >= GTK_JUSTIFY_LEFT && justification <= GTK_JUSTIFY_FILL);
/* FIXME: Make sure the color we are fed is opaque. The real solution is
* to fix the callers.
*/
color = NAUTILUS_RGBA_COLOR_PACK (NAUTILUS_RGBA_COLOR_GET_R (color),
NAUTILUS_RGBA_COLOR_GET_G (color),
NAUTILUS_RGBA_COLOR_GET_B (color),
255);
for (item = text_layout->rows; item; item = item->next) {
if (item->data) {
row = item->data;
switch (justification) {
case GTK_JUSTIFY_LEFT:
xpos = 0;
break;
case GTK_JUSTIFY_RIGHT:
xpos = text_layout->width - row->width;
break;
case GTK_JUSTIFY_CENTER:
xpos = (text_layout->width - row->width) / 2;
break;
default:
/* Anyone care to implement GTK_JUSTIFY_FILL? */
g_warning ("Justification type %d not supported. Using left-justification.",
(int) justification);
xpos = 0;
}
nautilus_scalable_font_draw_text (text_layout->font,
destination_pixbuf,
x + xpos,
y,
NULL,
text_layout->font_size,
text_layout->font_size,
row->text,
row->text_length,
color,
255,
inverted);
/* Underline the text if needed */
if (underlined) {
GdkRectangle underline_rect;
/* FIXME bugzilla.eazel.com 2865: This underlining code should
* take into account the baseline for the rendered string rather
* that doing the '-2' nonsense.
*/
underline_rect.x = x + xpos;
underline_rect.y = y + text_layout->font_size - 2;
underline_rect.width = row->width;
underline_rect.height = 1;
nautilus_gdk_pixbuf_fill_rectangle_with_color (destination_pixbuf,
&underline_rect,
color);
}
y += text_layout->baseline_skip;
} else
y += text_layout->baseline_skip / 2;
}
}
GdkPixbuf *
nautilus_gdk_pixbuf_new_from_text (const NautilusScalableFont *font,
guint font_width,
guint font_height,
const char *text,
guint text_length,
guint32 color,
guchar overall_alpha,
gboolean inverted)
{
GdkPixbuf *pixbuf;
guint text_width;
guint text_height;
g_return_val_if_fail (NAUTILUS_IS_SCALABLE_FONT (font), NULL);
g_return_val_if_fail (font_width > 0, NULL);
g_return_val_if_fail (font_height > 0, NULL);
if (text == NULL || text[0] == '\0' || text_length == 0) {
return NULL;
}
g_return_val_if_fail (text_length <= strlen (text), NULL);
nautilus_scalable_font_measure_text (font,
font_width,
font_height,
text,
strlen (text),
&text_width,
&text_height);
g_assert (text_width > 0);
g_assert (text_height > 0);
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, text_width, text_height);
nautilus_gdk_pixbuf_fill_rectangle_with_color (pixbuf, NULL, NAUTILUS_RGBA_COLOR_PACK (0, 0, 0, 0));
nautilus_scalable_font_draw_text (font,
pixbuf,
0,
0,
NULL,
font_width,
font_height,
text,
strlen (text),
color,
overall_alpha,
inverted);
return pixbuf;
}
#if !defined (NAUTILUS_OMIT_SELF_CHECK)
void
nautilus_self_check_scalable_font (void)
{
/* const char *fonts_place = NAUTILUS_DATADIR "/fonts/urw"; */
}
#endif /* !NAUTILUS_OMIT_SELF_CHECK */
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