+++ /dev/null
-/*
- * Implements search and copy functionality for Djvu files.
- * Copyright (C) 2006 Michael Hofmann <mh21@piware.de>
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#include "djvu-document-private.h"
-#include "djvu-document.h"
-#include "djvu-text.h"
-#include "djvu-text-page.h"
-#include "ev-document-find.h"
-#include "ev-document.h"
-
-#include <string.h>
-#include <glib.h>
-
-struct _DjvuText {
- DjvuDocument *document;
- gboolean case_sensitive;
- char *text;
- GList **pages;
- guint idle;
- int start_page;
- int search_page;
-};
-
-/**
- * djvu_text_idle_callback:
- * @data: #DjvuText instance
- *
- * Idle callback that processes one page at a time.
- *
- * Returns: whether there are more pages to be processed
- */
-static gboolean
-djvu_text_idle_callback (void *data)
-{
- DjvuText *djvu_text = (DjvuText *) data;
- DjvuDocument *djvu_document = djvu_text->document;
- int n_pages;
- miniexp_t page_text;
-
- ev_document_doc_mutex_lock ();
- while ((page_text =
- ddjvu_document_get_pagetext (djvu_document->d_document,
- djvu_text->search_page,
- "char")) == miniexp_dummy)
- djvu_handle_events (djvu_document, TRUE);
-
- if (page_text != miniexp_nil) {
- DjvuTextPage *page = djvu_text_page_new (page_text);
- djvu_text_page_prepare_search (page, djvu_text->case_sensitive);
- if (page->links->len > 0) {
- djvu_text_page_search (page, djvu_text->text);
- djvu_text->pages[djvu_text->search_page] = page->results;
- ev_document_find_changed (EV_DOCUMENT_FIND
- (djvu_document),
- djvu_text->search_page);
- }
- djvu_text_page_free (page);
- ddjvu_miniexp_release (djvu_document->d_document,
- page_text);
- }
- ev_document_doc_mutex_unlock ();
-
- n_pages =
- djvu_document_get_n_pages (EV_DOCUMENT (djvu_text->document));
- djvu_text->search_page += 1;
- if (djvu_text->search_page == n_pages) {
- /* wrap around */
- djvu_text->search_page = 0;
- }
-
- if (djvu_text->search_page != djvu_text->start_page)
- return TRUE;
-
- /* We're done. */
- djvu_text->idle = 0;
- /* will return FALSE to remove */
- return FALSE;
-}
-
-/**
- * djvu_text_new:
- * @djvu_document: document to search
- * @start_page: first page to search
- * @case_sensitive: uses g_utf8_case_fold() to enable case-insensitive
- * searching
- * @text: text to search
- *
- * Creates a new #DjvuText instance to enable searching. An idle call
- * is used to process all pages starting from @start_page.
- *
- * Returns: newly created instance
- */
-DjvuText *
-djvu_text_new (DjvuDocument *djvu_document,
- int start_page,
- gboolean case_sensitive,
- const char *text)
-{
- DjvuText *djvu_text;
- int n_pages;
- int i;
-
- n_pages = djvu_document_get_n_pages (EV_DOCUMENT (djvu_document));
-
- djvu_text = g_new0 (DjvuText, 1);
-
- if (case_sensitive)
- djvu_text->text = g_strdup (text);
- else
- djvu_text->text = g_utf8_casefold (text, -1);
- djvu_text->pages = g_new0 (GList *, n_pages);
- for (i = 0; i < n_pages; i++) {
- djvu_text->pages[i] = NULL;
- }
-
- djvu_text->document = djvu_document;
-
- /* We add at low priority so the progress bar repaints */
- djvu_text->idle = g_idle_add_full (G_PRIORITY_LOW,
- djvu_text_idle_callback,
- djvu_text, NULL);
-
- djvu_text->case_sensitive = case_sensitive;
- djvu_text->start_page = start_page;
- djvu_text->search_page = start_page;
-
- return djvu_text;
-}
-
-/**
- * djvu_text_copy:
- * @djvu_document: document to search
- * @page: page to search
- * @rectangle: rectangle to copy
- *
- * Copies and returns the text in the given rectangle.
- *
- * Returns: newly allocated text or NULL of none is available
- */
-char *
-djvu_text_copy (DjvuDocument *djvu_document,
- int page,
- EvRectangle *rectangle)
-{
- miniexp_t page_text;
- char* text = NULL;
-
- while ((page_text =
- ddjvu_document_get_pagetext (djvu_document->d_document,
- page, "char")) == miniexp_dummy)
- djvu_handle_events (djvu_document, TRUE);
-
- 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;
-}
-
-/**
- * djvu_text_free:
- * @djvu_text: instance to free
- *
- * Frees the given #DjvuText instance.
- */
-void djvu_text_free (DjvuText * djvu_text)
-{
- DjvuDocument *djvu_document = djvu_text->document;
- int n_pages;
- int i;
-
- if (djvu_text->idle != 0)
- g_source_remove (djvu_text->idle);
-
- n_pages = djvu_document_get_n_pages (EV_DOCUMENT (djvu_document));
- for (i = 0; i < n_pages; i++) {
- g_list_foreach (djvu_text->pages[i], (GFunc) g_free, NULL);
- g_list_free (djvu_text->pages[i]);
- }
-
- g_free (djvu_text->text);
-}
-
-/**
- * djvu_text_get_text:
- * @djvu_text: #DjvuText instance
- *
- * Returns the search text. This is mainly to be able to avoid reinstantiation
- * for the same search text.
- *
- * Returns: the text this instance of #DjvuText is looking for
- */
-const char *
-djvu_text_get_text (DjvuText *djvu_text)
-{
- return djvu_text->text;
-}
-
-/**
- * djvu_text_n_results:
- * @djvu_text: #DjvuText instance
- * @page: page number
- *
- * Returns the number of search results available for the given page.
- *
- * Returns: number of search results
- */
-int
-djvu_text_n_results (DjvuText *djvu_text,
- int page)
-{
- return g_list_length (djvu_text->pages[page]);
-}
-
-/**
- * djvu_text_has_results:
- * @djvu_text: #DjvuText instance
- * @page: page number
- *
- * Returns whether there are search results available for the given page.
- * This method executes faster than djvu_text_n_results().
- *
- * Returns: whether there are search results
- */
-int
-djvu_text_has_results (DjvuText *djvu_text,
- int page)
-{
- return djvu_text->pages[page] != NULL;
-}
-
-/**
- * djvu_text_get_result:
- * @djvu_text: #DjvuText instance
- * @page: page number
- * @n_result: result number
- *
- * Returns the n-th search result of a given page. The coordinates are
- * Djvu-specific and need to be processed to be compatible with the Evince
- * coordinate system. The result may span several lines!
- *
- * Returns: the rectangle for the search result
- */
-EvRectangle *
-djvu_text_get_result (DjvuText *djvu_text,
- int page,
- int n_result)
-{
- return (EvRectangle *) g_list_nth_data (djvu_text->pages[page],
- n_result);
-}
-
-/**
- * djvu_text_get_progress:
- * @djvu_text: #DjvuText instance
- *
- * Returns the percentage of pages done searching.
- *
- * Returns: the progress as value between 0 and 1
- */
-double
-djvu_text_get_progress (DjvuText *djvu_text)
-{
- int pages_done;
- int n_pages;
-
- n_pages =
- djvu_document_get_n_pages (EV_DOCUMENT (djvu_text->document));
- if (djvu_text->search_page > djvu_text->start_page) {
- pages_done = djvu_text->search_page - djvu_text->start_page + 1;
- } else if (djvu_text->search_page == djvu_text->start_page) {
- pages_done = n_pages;
- } else {
- pages_done =
- n_pages - djvu_text->start_page + djvu_text->search_page;
- }
- return pages_done / (double) n_pages;
-}
-
https://www.fi.muni.cz/~kas/git / evince.git / blobdiff