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423 lines
12 KiB
C++
423 lines
12 KiB
C++
/***************************************************************************
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* Copyright (C) 2004 by Enrico Ros <eros.kde@email.it> *
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* Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group *
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* company, info@kdab.com. Work sponsored by the *
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* LiMux project of the city of Munich *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it 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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#ifndef _OKULAR_PAGE_H_
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#define _OKULAR_PAGE_H_
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#include <QLinkedList>
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#include "area.h"
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#include "global.h"
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#include "okularcore_export.h"
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#include "textpage.h"
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class QPixmap;
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class PagePainter;
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namespace Okular
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{
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class Annotation;
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class Document;
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class DocumentObserver;
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class DocumentPrivate;
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class FormField;
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class PagePrivate;
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class PageTransition;
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class SourceReference;
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class TextSelection;
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class Tile;
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/**
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* @short Collector for all the data belonging to a page.
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*
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* The Page class contains pixmaps (referenced using observers id as key),
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* a search page (a class used internally for retrieving text), rect classes
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* (that describe links or other active areas in the current page) and more.
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*
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* All coordinates are normalized to the page, so {x,y} are valid in [0,1]
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* range as long as NormalizedRect components.
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*
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* Note: The class takes ownership of all objects.
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*/
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class OKULARCORE_EXPORT Page
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{
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public:
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/**
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* An action to be executed when particular events happen.
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*/
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enum PageAction {
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Opening, ///< An action to be executed when the page is "opened".
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Closing ///< An action to be executed when the page is "closed".
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};
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/**
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* Creates a new page.
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*
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* @param pageNumber The number of the page in the document.
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* @param width The width of the page.
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* @param height The height of the page.
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* @param orientation The orientation of the page
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*/
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Page(uint pageNumber, double width, double height, Rotation orientation);
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/**
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* Destroys the page.
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*/
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~Page();
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/**
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* Returns the number of the page in the document.
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*/
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int number() const;
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/**
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* Returns the orientation of the page as defined by the document.
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*/
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Rotation orientation() const;
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/**
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* Returns the rotation of the page as defined by the user.
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*/
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Rotation rotation() const;
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/**
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* Returns the total orientation which is the original orientation plus
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* the user defined rotation.
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*/
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Rotation totalOrientation() const;
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/**
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* Returns the width of the page.
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*/
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double width() const;
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/**
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* Returns the height of the page.
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*/
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double height() const;
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/**
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* Returns the ration (height / width) of the page.
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*/
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double ratio() const;
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/**
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* Returns the bounding box of the page content in normalized [0,1] coordinates,
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* in terms of the upright orientation (Rotation0).
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* If it has not been computed yet, returns the full page (i.e., (0, 0, 1, 1)).
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* Note that the bounding box may be null if the page is blank.
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*
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* @since 0.7 (KDE 4.1)
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*/
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NormalizedRect boundingBox() const;
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/**
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* Returns whether the bounding box of the page has been computed.
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* Note that even if the bounding box is computed, it may be null if the page is blank.
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*
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* @since 0.7 (KDE 4.1)
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*/
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bool isBoundingBoxKnown() const;
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/**
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* Sets the bounding box of the page content in normalized [0,1] coordinates,
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* in terms of the upright orientation (Rotation0).
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* (This does not inform the document's observers, call Document::SetPageBoundingBox
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* instead if you want that.)
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*
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* @since 0.7 (KDE 4.1)
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*/
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void setBoundingBox(const NormalizedRect &bbox);
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/**
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* Returns whether the page of size @p width x @p height has a @p pixmap
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* in the region given by @p rect for the given @p observer
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* If there is a partially rendered pixmap the answer is false.
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*/
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bool hasPixmap(DocumentObserver *observer, int width = -1, int height = -1, const NormalizedRect &rect = NormalizedRect()) const;
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/**
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* Returns whether the page provides a text page (@ref TextPage).
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*/
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bool hasTextPage() const;
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/**
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* Returns whether the page has an object rect which includes the point (@p x, @p y)
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* at scale (@p xScale, @p yScale).
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*/
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bool hasObjectRect(double x, double y, double xScale, double yScale) const;
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/**
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* Returns whether the page provides highlighting for the observer with the
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* given @p id.
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*/
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bool hasHighlights(int id = -1) const;
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/**
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* Returns whether the page provides a transition effect.
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*/
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bool hasTransition() const;
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/**
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* Returns whether the page provides annotations.
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*/
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bool hasAnnotations() const;
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/**
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* Returns the bounding rect of the text which matches the following criteria
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* or 0 if the search is not successful.
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*
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* @param id An unique id for this search.
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* @param text The search text.
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* @param direction The direction of the search (@ref SearchDirection)
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* @param caseSensitivity If Qt::CaseSensitive, the search is case sensitive; otherwise
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* the search is case insensitive.
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* @param lastRect If 0 (default) the search starts at the beginning of the page, otherwise
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* right/below the coordinates of the given rect.
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*/
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RegularAreaRect *findText(int id, const QString &text, SearchDirection direction, Qt::CaseSensitivity caseSensitivity, const RegularAreaRect *lastRect = nullptr) const;
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/**
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* Returns the page text (or part of it).
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* @see TextPage::text()
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*/
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QString text(const RegularAreaRect *area = nullptr) const;
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/**
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* Returns the page text (or part of it).
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* @see TextPage::text()
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* @since 0.10 (KDE 4.4)
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*/
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QString text(const RegularAreaRect *area, TextPage::TextAreaInclusionBehaviour b) const;
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/**
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* Returns the page text (or part of it) including the bounding
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* rectangles. Note that ownership of the contents of the returned
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* list belongs to the caller.
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* @see TextPage::words()
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* @since 0.14 (KDE 4.8)
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*/
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TextEntity::List words(const RegularAreaRect *area, TextPage::TextAreaInclusionBehaviour b) const;
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/**
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* Returns the area and text of the word at the given point
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* Note that ownership of the returned area belongs to the caller.
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* @see TextPage::wordAt()
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* @since 0.15 (KDE 4.9)
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*/
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RegularAreaRect *wordAt(const NormalizedPoint &p, QString *word = nullptr) const;
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/**
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* Returns the rectangular area of the given @p selection.
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*/
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RegularAreaRect *textArea(TextSelection *selection) const;
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/**
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* Returns the object rect of the given @p type which is at point (@p x, @p y) at scale (@p xScale, @p yScale).
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*/
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const ObjectRect *objectRect(ObjectRect::ObjectType type, double x, double y, double xScale, double yScale) const;
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/**
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* Returns all object rects of the given @p type which are at point (@p x, @p y) at scale (@p xScale, @p yScale).
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* @since 0.16 (KDE 4.10)
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*/
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QLinkedList<const ObjectRect *> objectRects(ObjectRect::ObjectType type, double x, double y, double xScale, double yScale) const;
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/**
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* Returns the object rect of the given @p type which is nearest to the point (@p x, @p y) at scale (@p xScale, @p yScale).
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*
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* @since 0.8.2 (KDE 4.2.2)
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*/
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const ObjectRect *nearestObjectRect(ObjectRect::ObjectType type, double x, double y, double xScale, double yScale, double *distance) const;
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/**
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* Returns the transition effect of the page or 0 if no transition
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* effect is set (see hasTransition()).
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*/
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const PageTransition *transition() const;
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/**
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* Returns the list of annotations of the page.
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*/
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QLinkedList<Annotation *> annotations() const;
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/**
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* Returns the annotation with the given unique name.
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* @since 1.3
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*/
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Annotation *annotation(const QString &uniqueName) const;
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/**
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* Returns the @ref Action object which is associated with the given page @p action
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* or 0 if no page action is set.
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*/
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const Action *pageAction(PageAction action) const;
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/**
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* Returns the list of FormField of the page.
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*/
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QLinkedList<FormField *> formFields() const;
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/**
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* Sets the region described by @p rect with @p pixmap for the
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* given @p observer.
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* If @p rect is not set (default) the @p pixmap is set to the entire
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* page.
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*/
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void setPixmap(DocumentObserver *observer, QPixmap *pixmap, const NormalizedRect &rect = NormalizedRect());
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/**
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* Sets the @p text page.
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*/
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void setTextPage(TextPage *text);
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/**
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* Sets the list of object @p rects of the page.
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*/
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void setObjectRects(const QLinkedList<ObjectRect *> &rects);
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/**
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* Sets the list of source reference objects @p rects.
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*/
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void setSourceReferences(const QLinkedList<SourceRefObjectRect *> &rects);
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/**
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* Sets the duration of the page to @p seconds when displayed in presentation mode.
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*
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* Setting a negative number disables the duration.
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*/
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void setDuration(double seconds);
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/**
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* Returns the duration in seconds of the page when displayed in presentation mode.
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*
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* A negative number means that no time is set.
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*/
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double duration() const;
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/**
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* Sets the labels for the page to @p label .
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*/
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void setLabel(const QString &label);
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/**
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* Returns the label of the page, or a null string if not set.
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*/
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QString label() const;
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/**
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* Returns the current text selection.
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*/
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const RegularAreaRect *textSelection() const;
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/**
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* Returns the color of the current text selection, or an invalid color
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* if no text selection has been set.
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*/
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QColor textSelectionColor() const;
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/**
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* Adds a new @p annotation to the page.
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*/
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void addAnnotation(Annotation *annotation);
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/**
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* Removes the @p annotation from the page.
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*/
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bool removeAnnotation(Annotation *annotation);
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/**
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* Sets the page @p transition effect.
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*/
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void setTransition(PageTransition *transition);
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/**
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* Sets the @p link object for the given page @p action.
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*/
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void setPageAction(PageAction action, Action *link);
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/**
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* Sets @p fields as list of FormField of the page.
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*/
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void setFormFields(const QLinkedList<FormField *> &fields);
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/**
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* Deletes the pixmap for the given @p observer
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*/
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void deletePixmap(DocumentObserver *observer);
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/**
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* Deletes all pixmaps of the page.
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*/
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void deletePixmaps();
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/**
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* Deletes all object rects of the page.
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*/
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void deleteRects();
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/**
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* Deletes all source reference objects of the page.
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*/
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void deleteSourceReferences();
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/**
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* Deletes all annotations of the page.
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*/
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void deleteAnnotations();
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/**
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* Returns whether pixmaps for the tiled observer are handled by a
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* tile manager.
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*
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* @since 0.19 (KDE 4.13)
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*/
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bool hasTilesManager(const DocumentObserver *observer) const;
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/**
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* Returns a list of all tiles intersecting with @p rect.
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*
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* The list contains only tiles with a pixmap
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*
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* @since 0.19 (KDE 4.13)
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*/
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QList<Tile> tilesAt(const DocumentObserver *observer, const NormalizedRect &rect) const;
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private:
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PagePrivate *d;
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/// @cond PRIVATE
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friend class PagePrivate;
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friend class Document;
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friend class DocumentPrivate;
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friend class PixmapRequestPrivate;
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/**
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* To improve performance PagePainter accesses the following
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* member variables directly.
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*/
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friend class ::PagePainter;
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/// @endcond
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const QPixmap *_o_nearestPixmap(DocumentObserver *, int, int) const;
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QLinkedList<ObjectRect *> m_rects;
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QLinkedList<HighlightAreaRect *> m_highlights;
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QLinkedList<Annotation *> m_annotations;
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Q_DISABLE_COPY(Page)
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};
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}
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#endif
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