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4cc58097a2
when determining if the mouse pointer is over a markup annotation (used by evince to change the pointer type). This is more accurate than just using the annot area. Implemented as a new libdocument method interface that we pass it the 'annotation' and 'x,y' coords and returns us whether that location is over the actual markup text of the annotation. The poppler implementation works by checking if there's any quadrilateral under that location. For pdf, quadrilaterals represent a more precise shape of the annotation than just the annotation area (which is currently used) so by checking the quads region we avoid false positives when hovering over blank space. The "point over a quadrilateral" code is based on: Algorithm: https://math.stackexchange.com/a/190203 Implementation: https://stackoverflow.com/a/37865332 Fixes issue #1275
108 lines
3.5 KiB
C
108 lines
3.5 KiB
C
/* ev-document-annotations.c
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* this file is part of evince, a gnome document viewer
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*
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* Copyright (C) 2009 Carlos Garcia Campos <carlosgc@gnome.org>
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* Copyright (C) 2007 Iñigo Martinez <inigomartinez@gmail.com>
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*
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* Evince is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Evince is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "ev-document-annotations.h"
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G_DEFINE_INTERFACE (EvDocumentAnnotations, ev_document_annotations, 0)
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static void
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ev_document_annotations_default_init (EvDocumentAnnotationsInterface *klass)
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{
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}
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EvMappingList *
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ev_document_annotations_get_annotations (EvDocumentAnnotations *document_annots,
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EvPage *page)
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{
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EvDocumentAnnotationsInterface *iface = EV_DOCUMENT_ANNOTATIONS_GET_IFACE (document_annots);
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return iface->get_annotations (document_annots, page);
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}
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gboolean
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ev_document_annotations_document_is_modified (EvDocumentAnnotations *document_annots)
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{
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EvDocumentAnnotationsInterface *iface = EV_DOCUMENT_ANNOTATIONS_GET_IFACE (document_annots);
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return (iface->document_is_modified) ? iface->document_is_modified (document_annots) : FALSE;
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}
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void
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ev_document_annotations_save_annotation (EvDocumentAnnotations *document_annots,
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EvAnnotation *annot,
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EvAnnotationsSaveMask mask)
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{
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EvDocumentAnnotationsInterface *iface = EV_DOCUMENT_ANNOTATIONS_GET_IFACE (document_annots);
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iface->save_annotation (document_annots, annot, mask);
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}
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void
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ev_document_annotations_add_annotation (EvDocumentAnnotations *document_annots,
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EvAnnotation *annot,
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EvRectangle *rect)
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{
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EvDocumentAnnotationsInterface *iface = EV_DOCUMENT_ANNOTATIONS_GET_IFACE (document_annots);
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if (iface->add_annotation)
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iface->add_annotation (document_annots, annot, rect);
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}
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gboolean
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ev_document_annotations_can_add_annotation (EvDocumentAnnotations *document_annots)
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{
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EvDocumentAnnotationsInterface *iface = EV_DOCUMENT_ANNOTATIONS_GET_IFACE (document_annots);
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return iface->add_annotation != NULL;
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}
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void
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ev_document_annotations_remove_annotation (EvDocumentAnnotations *document_annots,
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EvAnnotation *annot)
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{
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EvDocumentAnnotationsInterface *iface = EV_DOCUMENT_ANNOTATIONS_GET_IFACE (document_annots);
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if (iface->remove_annotation)
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iface->remove_annotation (document_annots, annot);
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}
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gboolean
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ev_document_annotations_can_remove_annotation (EvDocumentAnnotations *document_annots)
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{
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EvDocumentAnnotationsInterface *iface = EV_DOCUMENT_ANNOTATIONS_GET_IFACE (document_annots);
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return iface->remove_annotation != NULL;
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}
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EvAnnotationsOverMarkup
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ev_document_annotations_over_markup (EvDocumentAnnotations *document_annots,
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EvAnnotation *annot,
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gdouble x,
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gdouble y)
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{
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EvDocumentAnnotationsInterface *iface = EV_DOCUMENT_ANNOTATIONS_GET_IFACE (document_annots);
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if (iface->over_markup)
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return iface->over_markup (document_annots, annot, x, y);
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return EV_ANNOTATION_OVER_MARKUP_NOT_IMPLEMENTED;
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}
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