openkylin
/
atril
mirror of https://gitee.com/openkylin/atril.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
atril/backend/djvu/djvu-document.c

705 lines
19 KiB
C
Raw Blame History

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
/*
* Copyright (C) 2005, Nickolay V. Shmyrev <nshmyrev@yandex.ru>
*
* 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, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include <config.h>
#include "djvu-document.h"
#include "djvu-text-page.h"
#include "djvu-links.h"
#include "djvu-document-private.h"
#include "ev-document-thumbnails.h"
#include "ev-file-exporter.h"
#include "ev-document-misc.h"
#include "ev-document-find.h"
#include "ev-document-links.h"
#include "ev-selection.h"
#include "ev-file-helpers.h"
#include <glib.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <glib/gi18n-lib.h>
#include <string.h>
#define SCALE_FACTOR 0.2
enum {
PROP_0,
PROP_TITLE
};
struct _DjvuDocumentClass
{
EvDocumentClass parent_class;
};
typedef struct _DjvuDocumentClass DjvuDocumentClass;
static void djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface);
static void djvu_document_file_exporter_iface_init (EvFileExporterInterface *iface);
static void djvu_document_find_iface_init (EvDocumentFindInterface *iface);
static void djvu_document_document_links_iface_init (EvDocumentLinksInterface *iface);
static void djvu_selection_iface_init (EvSelectionInterface *iface);
EV_BACKEND_REGISTER_WITH_CODE (DjvuDocument, djvu_document,
{
EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS, djvu_document_document_thumbnails_iface_init);
EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER, djvu_document_file_exporter_iface_init);
EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_FIND, djvu_document_find_iface_init);
EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_LINKS, djvu_document_document_links_iface_init);
EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_SELECTION, djvu_selection_iface_init);
});
#define EV_DJVU_ERROR ev_djvu_error_quark ()
static GQuark
ev_djvu_error_quark (void)
{
static GQuark q = 0;
if (q == 0)
q = g_quark_from_string ("ev-djvu-quark");
return q;
}
static void
handle_message (const ddjvu_message_t *msg, GError **error)
{
switch (msg->m_any.tag) {
case DDJVU_ERROR: {
gchar *error_str;
if (msg->m_error.filename) {
error_str = g_strdup_printf ("DjvuLibre error: %s:%d",
msg->m_error.filename,
msg->m_error.lineno);
} else {
error_str = g_strdup_printf ("DjvuLibre error: %s",
msg->m_error.message);
}
if (error) {
g_set_error_literal (error, EV_DJVU_ERROR, 0, error_str);
} else {
g_warning ("%s", error_str);
}
g_free (error_str);
return;
}
break;
default:
break;
}
}
void
djvu_handle_events (DjvuDocument *djvu_document, int wait, GError **error)
{
ddjvu_context_t *ctx = djvu_document->d_context;
const ddjvu_message_t *msg;
if (!ctx)
return;
if (wait)
ddjvu_message_wait (ctx);
while ((msg = ddjvu_message_peek (ctx))) {
handle_message (msg, error);
ddjvu_message_pop (ctx);
if (error && *error)
return;
}
}
static void
djvu_wait_for_message (DjvuDocument *djvu_document, ddjvu_message_tag_t message, GError **error)
{
ddjvu_context_t *ctx = djvu_document->d_context;
const ddjvu_message_t *msg;
ddjvu_message_wait (ctx);
while ((msg = ddjvu_message_peek (ctx)) && (msg->m_any.tag != message)) {
handle_message (msg, error);
ddjvu_message_pop (ctx);
if (error && *error)
return;
}
if (msg && msg->m_any.tag == message)
ddjvu_message_pop (ctx);
}
static gboolean
djvu_document_load (EvDocument *document,
const char *uri,
GError **error)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
ddjvu_document_t *doc;
gchar *filename;
gboolean missing_files = FALSE;
GError *djvu_error = NULL;
/* FIXME: We could actually load uris */
filename = g_filename_from_uri (uri, NULL, error);
if (!filename)
return FALSE;
doc = ddjvu_document_create_by_filename (djvu_document->d_context, filename, TRUE);
if (!doc) {
g_free (filename);
g_set_error_literal (error,
EV_DOCUMENT_ERROR,
EV_DOCUMENT_ERROR_INVALID,
_("DjVu document has incorrect format"));
return FALSE;
}
if (djvu_document->d_document)
ddjvu_document_release (djvu_document->d_document);
djvu_document->d_document = doc;
djvu_wait_for_message (djvu_document, DDJVU_DOCINFO, &djvu_error);
if (djvu_error) {
g_set_error_literal (error,
EV_DOCUMENT_ERROR,
EV_DOCUMENT_ERROR_INVALID,
djvu_error->message);
g_error_free (djvu_error);
g_free (filename);
ddjvu_document_release (djvu_document->d_document);
djvu_document->d_document = NULL;
return FALSE;
}
if (ddjvu_document_decoding_error (djvu_document->d_document))
djvu_handle_events (djvu_document, TRUE, &djvu_error);
if (djvu_error) {
g_set_error_literal (error,
EV_DOCUMENT_ERROR,
EV_DOCUMENT_ERROR_INVALID,
djvu_error->message);
g_error_free (djvu_error);
g_free (filename);
ddjvu_document_release (djvu_document->d_document);
djvu_document->d_document = NULL;
return FALSE;
}
g_free (djvu_document->uri);
djvu_document->uri = g_strdup (uri);
if (ddjvu_document_get_type (djvu_document->d_document) == DDJVU_DOCTYPE_INDIRECT) {
gint n_files;
gint i;
gchar *base;
base = g_path_get_dirname (filename);
n_files = ddjvu_document_get_filenum (djvu_document->d_document);
for (i = 0; i < n_files; i++) {
struct ddjvu_fileinfo_s fileinfo;
gchar *file;
ddjvu_document_get_fileinfo (djvu_document->d_document,
i, &fileinfo);
if (fileinfo.type != 'P')
continue;
file = g_build_filename (base, fileinfo.id, NULL);
if (!g_file_test (file, G_FILE_TEST_EXISTS)) {
missing_files = TRUE;
g_free (file);
break;
}
g_free (file);
}
g_free (base);
}
g_free (filename);
if (missing_files) {
g_set_error_literal (error,
G_FILE_ERROR,
G_FILE_ERROR_EXIST,
_("The document is composed of several files. "
"One or more of these files cannot be accessed."));
return FALSE;
}
return TRUE;
}
static gboolean
djvu_document_save (EvDocument *document,
const char *uri,
GError **error)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
return ev_xfer_uri_simple (djvu_document->uri, uri, error);
}
int
djvu_document_get_n_pages (EvDocument *document)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
g_return_val_if_fail (djvu_document->d_document, 0);
return ddjvu_document_get_pagenum (djvu_document->d_document);
}
static void
document_get_page_size (DjvuDocument *djvu_document,
gint page,
double *width,
double *height)
{
ddjvu_pageinfo_t info;
ddjvu_status_t r;
while ((r = ddjvu_document_get_pageinfo(djvu_document->d_document, page, &info)) < DDJVU_JOB_OK)
djvu_handle_events(djvu_document, TRUE, NULL);
if (r >= DDJVU_JOB_FAILED)
djvu_handle_events(djvu_document, TRUE, NULL);
*width = info.width * SCALE_FACTOR;
*height = info.height * SCALE_FACTOR;
}
static void
djvu_document_get_page_size (EvDocument *document,
EvPage *page,
double *width,
double *height)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
g_return_if_fail (djvu_document->d_document);
document_get_page_size (djvu_document, page->index,
width, height);
}
static cairo_surface_t *
djvu_document_render (EvDocument *document,
EvRenderContext *rc)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
cairo_surface_t *surface;
gchar *pixels;
gint rowstride;
ddjvu_rect_t rrect;
ddjvu_rect_t prect;
ddjvu_page_t *d_page;
ddjvu_page_rotation_t rotation;
double page_width, page_height, tmp;
d_page = ddjvu_page_create_by_pageno (djvu_document->d_document, rc->page->index);
while (!ddjvu_page_decoding_done (d_page))
djvu_handle_events(djvu_document, TRUE, NULL);
page_width = ddjvu_page_get_width (d_page) * rc->scale * SCALE_FACTOR + 0.5;
page_height = ddjvu_page_get_height (d_page) * rc->scale * SCALE_FACTOR + 0.5;
switch (rc->rotation) {
case 90:
rotation = DDJVU_ROTATE_90;
tmp = page_height;
page_height = page_width;
page_width = tmp;
break;
case 180:
rotation = DDJVU_ROTATE_180;
break;
case 270:
rotation = DDJVU_ROTATE_270;
tmp = page_height;
page_height = page_width;
page_width = tmp;
break;
default:
rotation = DDJVU_ROTATE_0;
}
surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
page_width, page_height);
rowstride = cairo_image_surface_get_stride (surface);
pixels = (gchar *)cairo_image_surface_get_data (surface);
prect.x = 0;
prect.y = 0;
prect.w = page_width;
prect.h = page_height;
rrect = prect;
ddjvu_page_set_rotation (d_page, rotation);
ddjvu_page_render (d_page, DDJVU_RENDER_COLOR,
&prect,
&rrect,
djvu_document->d_format,
rowstride,
pixels);
cairo_surface_mark_dirty (surface);
return surface;
}
static void
djvu_document_finalize (GObject *object)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (object);
if (djvu_document->d_document)
ddjvu_document_release (djvu_document->d_document);
if (djvu_document->opts)
g_string_free (djvu_document->opts, TRUE);
if (djvu_document->ps_filename)
g_free (djvu_document->ps_filename);
ddjvu_context_release (djvu_document->d_context);
ddjvu_format_release (djvu_document->d_format);
ddjvu_format_release (djvu_document->thumbs_format);
g_free (djvu_document->uri);
G_OBJECT_CLASS (djvu_document_parent_class)->finalize (object);
}
static void
djvu_document_class_init (DjvuDocumentClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
gobject_class->finalize = djvu_document_finalize;
ev_document_class->load = djvu_document_load;
ev_document_class->save = djvu_document_save;
ev_document_class->get_n_pages = djvu_document_get_n_pages;
ev_document_class->get_page_size = djvu_document_get_page_size;
ev_document_class->render = djvu_document_render;
}
static gchar *
djvu_text_copy (DjvuDocument *djvu_document,
gint page,
EvRectangle *rectangle)
{
miniexp_t page_text;
gchar *text = NULL;
while ((page_text =
ddjvu_document_get_pagetext (djvu_document->d_document,
page, "char")) == miniexp_dummy)
djvu_handle_events (djvu_document, TRUE, NULL);
if (page_text != miniexp_nil) {
DjvuTextPage *page = djvu_text_page_new (page_text);
text = djvu_text_page_copy (page, rectangle);
djvu_text_page_free (page);
ddjvu_miniexp_release (djvu_document->d_document, page_text);
}
return text;
}
static gchar *
djvu_selection_get_selected_text (EvSelection *selection,
EvPage *page,
EvSelectionStyle style,
EvRectangle *points)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (selection);
double width, height;
EvRectangle rectangle;
gchar *text;
djvu_document_get_page_size (EV_DOCUMENT (djvu_document),
page, &width, &height);
rectangle.x1 = points->x1 / SCALE_FACTOR;
rectangle.y1 = (height - points->y2) / SCALE_FACTOR;
rectangle.x2 = points->x2 / SCALE_FACTOR;
rectangle.y2 = (height - points->y1) / SCALE_FACTOR;
text = djvu_text_copy (djvu_document, page->index, &rectangle);
if (text == NULL)
text = g_strdup ("");
return text;
}
static void
djvu_selection_iface_init (EvSelectionInterface *iface)
{
iface->get_selected_text = djvu_selection_get_selected_text;
}
static void
djvu_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
EvRenderContext *rc,
gint *width,
gint *height)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
gdouble page_width, page_height;
djvu_document_get_page_size (EV_DOCUMENT(djvu_document), rc->page,
&page_width, &page_height);
if (rc->rotation == 90 || rc->rotation == 270) {
*width = (gint) (page_height * rc->scale);
*height = (gint) (page_width * rc->scale);
} else {
*width = (gint) (page_width * rc->scale);
*height = (gint) (page_height * rc->scale);
}
}
static GdkPixbuf *
djvu_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
EvRenderContext *rc,
gboolean border)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
GdkPixbuf *pixbuf, *rotated_pixbuf;
gdouble page_width, page_height;
gint thumb_width, thumb_height;
guchar *pixels;
g_return_val_if_fail (djvu_document->d_document, NULL);
djvu_document_get_page_size (EV_DOCUMENT(djvu_document), rc->page,
&page_width, &page_height);
thumb_width = (gint) (page_width * rc->scale);
thumb_height = (gint) (page_height * rc->scale);
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
thumb_width, thumb_height);
gdk_pixbuf_fill (pixbuf, 0xffffffff);
pixels = gdk_pixbuf_get_pixels (pixbuf);
while (ddjvu_thumbnail_status (djvu_document->d_document, rc->page->index, 1) < DDJVU_JOB_OK)
djvu_handle_events(djvu_document, TRUE, NULL);
ddjvu_thumbnail_render (djvu_document->d_document, rc->page->index,
&thumb_width, &thumb_height,
djvu_document->thumbs_format,
gdk_pixbuf_get_rowstride (pixbuf),
(gchar *)pixels);
rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
g_object_unref (pixbuf);
if (border) {
GdkPixbuf *tmp_pixbuf = rotated_pixbuf;
rotated_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
g_object_unref (tmp_pixbuf);
}
return rotated_pixbuf;
}
static void
djvu_document_document_thumbnails_iface_init (EvDocumentThumbnailsInterface *iface)
{
iface->get_thumbnail = djvu_document_thumbnails_get_thumbnail;
iface->get_dimensions = djvu_document_thumbnails_get_dimensions;
}
/* EvFileExporterIface */
static void
djvu_document_file_exporter_begin (EvFileExporter *exporter,
EvFileExporterContext *fc)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
if (djvu_document->ps_filename)
g_free (djvu_document->ps_filename);
djvu_document->ps_filename = g_strdup (fc->filename);
g_string_assign (djvu_document->opts, "-page=");
}
static void
djvu_document_file_exporter_do_page (EvFileExporter *exporter,
EvRenderContext *rc)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
g_string_append_printf (djvu_document->opts, "%d,", (rc->page->index) + 1);
}
static void
djvu_document_file_exporter_end (EvFileExporter *exporter)
{
int d_optc = 1;
const char *d_optv[d_optc];
DjvuDocument *djvu_document = DJVU_DOCUMENT (exporter);
FILE *fn = fopen (djvu_document->ps_filename, "w");
if (fn == NULL) {
g_warning ("Cannot open file “%s”.", djvu_document->ps_filename);
return;
}
d_optv[0] = djvu_document->opts->str;
ddjvu_job_t * job = ddjvu_document_print(djvu_document->d_document, fn, d_optc, d_optv);
while (!ddjvu_job_done(job)) {
djvu_handle_events (djvu_document, TRUE, NULL);
}
fclose(fn);
}
static EvFileExporterCapabilities
djvu_document_file_exporter_get_capabilities (EvFileExporter *exporter)
{
return EV_FILE_EXPORTER_CAN_PAGE_SET |
EV_FILE_EXPORTER_CAN_COPIES |
EV_FILE_EXPORTER_CAN_COLLATE |
EV_FILE_EXPORTER_CAN_REVERSE |
EV_FILE_EXPORTER_CAN_GENERATE_PS;
}
static void
djvu_document_file_exporter_iface_init (EvFileExporterInterface *iface)
{
iface->begin = djvu_document_file_exporter_begin;
iface->do_page = djvu_document_file_exporter_do_page;
iface->end = djvu_document_file_exporter_end;
iface->get_capabilities = djvu_document_file_exporter_get_capabilities;
}
static void
djvu_document_init (DjvuDocument *djvu_document)
{
guint masks[4] = { 0xff0000, 0xff00, 0xff, 0xff000000 };
djvu_document->d_context = ddjvu_context_create ("Atril");
djvu_document->d_format = ddjvu_format_create (DDJVU_FORMAT_RGBMASK32, 4, masks);
ddjvu_format_set_row_order (djvu_document->d_format, 1);
djvu_document->thumbs_format = ddjvu_format_create (DDJVU_FORMAT_RGB24, 0, 0);
ddjvu_format_set_row_order (djvu_document->thumbs_format, 1);
djvu_document->ps_filename = NULL;
djvu_document->opts = g_string_new ("");
djvu_document->d_document = NULL;
}
static GList *
djvu_document_find_find_text (EvDocumentFind *document,
EvPage *page,
const char *text,
gboolean case_sensitive)
{
DjvuDocument *djvu_document = DJVU_DOCUMENT (document);
miniexp_t page_text;
gdouble width, height;
GList *matches = NULL, *l;
g_return_val_if_fail (text != NULL, NULL);
while ((page_text = ddjvu_document_get_pagetext (djvu_document->d_document,
page->index,
"char")) == miniexp_dummy)
djvu_handle_events (djvu_document, TRUE, NULL);
if (page_text != miniexp_nil) {
DjvuTextPage *tpage = djvu_text_page_new (page_text);
djvu_text_page_prepare_search (tpage, case_sensitive);
if (tpage->links->len > 0) {
djvu_text_page_search (tpage, text, case_sensitive);
matches = tpage->results;
}
djvu_text_page_free (tpage);
ddjvu_miniexp_release (djvu_document->d_document, page_text);
}
if (!matches)
return NULL;
document_get_page_size (djvu_document, page->index, &width, &height);
for (l = matches; l && l->data; l = g_list_next (l)) {
EvRectangle *r = (EvRectangle *)l->data;
gdouble tmp = r->y1;
r->x1 *= SCALE_FACTOR;
r->x2 *= SCALE_FACTOR;
r->y1 = height - r->y2 * SCALE_FACTOR;
r->y2 = height - tmp * SCALE_FACTOR;
}
return matches;
}
static void
djvu_document_find_iface_init (EvDocumentFindInterface *iface)
{
iface->find_text = djvu_document_find_find_text;
}
static EvMappingList *
djvu_document_links_get_links (EvDocumentLinks *document_links,
EvPage *page)
{
return djvu_links_get_links (document_links, page->index, SCALE_FACTOR);
}
static void
djvu_document_document_links_iface_init (EvDocumentLinksInterface *iface)
{
iface->has_document_links = djvu_links_has_document_links;
iface->get_links_model = djvu_links_get_links_model;
iface->get_links = djvu_document_links_get_links;
iface->find_link_dest = djvu_links_find_link_dest;
iface->find_link_page = djvu_links_find_link_page;
}
Reference in New Issue View Git Blame Copy Permalink