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Diffstat (limited to 'backend/djvu/djvu-text.c')
| -rw-r--r-- | backend/djvu/djvu-text.c | 302 |
1 files changed, 0 insertions, 302 deletions
diff --git a/backend/djvu/djvu-text.c b/backend/djvu/djvu-text.c deleted file mode 100644 index e87dbb1..0000000 --- a/backend/djvu/djvu-text.c +++ /dev/null @@ -1,302 +0,0 @@ -/* - * 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 <config.h> -#include <string.h> -#include <glib.h> -#include <libdjvu/miniexp.h> - -#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" - - - -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, NULL); - - 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, 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; -} - -/** - * 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; -} - |