mirror of
https://github.com/jkriege2/JKQtPlotter.git
synced 2024-11-16 02:25:50 +08:00
270 lines
13 KiB
C++
270 lines
13 KiB
C++
/*
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Copyright (c) 2008-2022 Jan W. Krieger (<jan@jkrieger.de>)
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with contributions from: Razi Alavizadeh
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This software is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License (LGPL) as published by
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the Free Software Foundation, either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License (LGPL) for more details.
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You should have received a copy of the GNU Lesser General Public License (LGPL)
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef JKQTMATHTEXTNODE_H
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#define JKQTMATHTEXTNODE_H
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#include "jkqtmathtext/jkqtmathtext_imexport.h"
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#include "jkqtmathtext/jkqtmathtexttools.h"
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#include <QPainter>
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class JKQTMathText; // forward
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/** \brief subclass representing one node in the syntax tree
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* \ingroup jkqtmathtext_items
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*
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* \image html jkqtmathtext/jkqtmathtext_node_geo.png
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*/
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class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextNode {
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public:
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explicit JKQTMathTextNode(JKQTMathText* parentMathText);
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JKQTMathTextNode(const JKQTMathTextNode&)=delete;
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JKQTMathTextNode& operator=(const JKQTMathTextNode&)=delete;
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virtual ~JKQTMathTextNode();
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/** \brief determine the size of the node, calls getSizeInternal() implementation of the actual type \see getSizeInternal()
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*
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* \param painter painter to use for determining the size
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* \param currentEv current environment object
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* \param[out] width width of the block/node
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* \param[out] baselineHeight distance from the bottom of the block/node-box to the baseline
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* \param[out] overallHeight overall height (bottom to top) of the node, the ascent is \c overallHeight-baselineHeight
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* \param[out] strikeoutPos position of the strikeout-line
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* \param[in] prevNodeSize optional parameter, describing the size of the previous node (on the left). This may be used for layout of some nodes (e.g. sub/super to move correctly next to large parantheses ...)
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*
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*/
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void getSize(QPainter& painter, JKQTMathTextEnvironment currentEv, double& width, double& baselineHeight, double& overallHeight, double& strikeoutPos, const JKQTMathTextNodeSize* prevNodeSize=nullptr);
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/** \brief calculates the x-size-difference between the given (probably) italic (width externally calculated: \a width_potentiallyitalic, \a ev_potentiallyitalic) and the non-italic version of \a child */
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double getNonItalicXCorretion(QPainter &painter, double width_potentiallyitalic, const JKQTMathTextEnvironment &ev_potentiallyitalic, JKQTMathTextNode* child) const;
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/** \brief draw the contents at the designated position
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*
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* \param painter QPainter to use
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* \param x x-position, where the drawing starts [Pixel]
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* \param y Y-position of the baseline, where the drawing starts [Pixel]
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* \param currentEv JKQTMathTextEnvironment object describing the current drawing environment/settings
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* \param[in] prevNodeSize optional parameter, describing the size of the previous node (on the left). This may be used for layout of some nodes (e.g. sub/super to move correctly next to large parantheses ...)
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* \return the x position which to use for the next part of the text
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*/
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virtual double draw(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv, const JKQTMathTextNodeSize* prevNodeSize=nullptr)=0;
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/** \brief convert node to HTML and returns \c true on success
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* \param[out] html new HTML code is APPENDED to this string
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* \param currentEv JKQTMathTextEnvironment object describing the current drawing environment/settings
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* \param defaultEv JKQTMathTextEnvironment object describing the default drawing environment/settings when starting to interpret a node tree
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* \return \c true on success
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*/
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virtual bool toHtml(QString& html, JKQTMathTextEnvironment currentEv, JKQTMathTextEnvironment defaultEv);
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/** \brief returns the drawing of colored boxes (for DEBUGGING) around the actual output of the node is enabled */
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bool getDrawBoxes() const;
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/** \brief enables the drawing of colored boxes (for DEBUGGING) around the actual output of the node */
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virtual void setDrawBoxes(bool draw);
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/** \brief return the name of this class as a string */
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virtual QString getTypeName() const;
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/** \copydoc parentNode */
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void setParentNode(JKQTMathTextNode* node);
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/** \copydoc parentNode */
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JKQTMathTextNode* getParentNode();
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/** \copydoc parentNode */
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const JKQTMathTextNode* getParentNode() const;
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/** \copydoc subSuperscriptAboveBelowNode */
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bool isSubSuperscriptAboveBelowNode() const;
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/** \copydoc subSuperscriptAboveBelowNode */
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void setSubSuperscriptAboveBelowNode(bool __value);
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protected:
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/** \brief determine the size of the node, overwrite this function in derived classes
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*
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* \param painter painter to use for determining the size
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* \param currentEv current environment object
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* \param[out] width width of the block/node
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* \param[out] baselineHeight distance from the bottom of the block/node-box to the baseline
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* \param[out] overallHeight overall height (bottom to top) of the node, the ascent is \c overallHeight-baselineHeight
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* \param[out] strikeoutPos position of the strikeout-line
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* \param[in] prevNodeSize optional parameter, describing the size of the previous node (on the left). This may be used for layout of some nodes (e.g. sub/super to move correctly next to large parantheses ...)
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*
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*/
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virtual void getSizeInternal(QPainter& painter, JKQTMathTextEnvironment currentEv, double& width, double& baselineHeight, double& overallHeight, double& strikeoutPos, const JKQTMathTextNodeSize* prevNodeSize=nullptr)=0;
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/** \brief parent JKQTMathText object (required for several drawing operations */
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JKQTMathText* parentMathText;
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/** \brief parent node of this node (i.e. one level up, ode \c nullptr ) */
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JKQTMathTextNode* parentNode;
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/** \brief enables the drawing of colored boxes (for DEBUGGING) around the actual output of the node */
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bool drawBoxes;
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/** \brief if \c true then following sub- and/or superscripts are placed below and above the node, not besides it.
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* This is activated when \c \\sum\\limits_{sub}^{sup} is used in LaTeX instead of simply \c \\sum_{sub}^{sup}
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*
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* The default is c false
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*/
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bool subSuperscriptAboveBelowNode;
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/** \brief draws colored boxes (for DEBUGGING) around the actual output of the node
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*
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* \param painter QPainter to use
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* \param x x-position, where the drawing starts [Pixel]
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* \param y Y-position of the baseline, where the drawing starts [Pixel]
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* \param currentEv JKQTMathTextEnvironment object describing the current drawing environment/settings
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*/
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void doDrawBoxes(QPainter& painter, double x, double y, JKQTMathTextEnvironment currentEv);
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/** \brief returns the list of parent, parent-of-parent, ... that can be cast to type \a T */
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template<class T>
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inline QList<T*> getParents() {
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QList<T*> lst;
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JKQTMathTextNode* p=getParentNode();
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T* pT=dynamic_cast<T*>(p);
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while (p!=nullptr) {
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if (pT!=nullptr) lst.append(pT);
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p=p->getParentNode();
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pT=dynamic_cast<T*>(p);
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}
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return lst;
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}
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/** \brief returns the list of parent, parent-of-parent, ... that can be cast to type \a T */
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template<class T>
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inline QList<const T*> getParents() const {
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QList<const T*> lst;
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const JKQTMathTextNode* p=getParentNode();
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const T* pT=dynamic_cast<const T*>(p);
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while (p!=nullptr) {
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if (pT!=nullptr) lst.append(pT);
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p=p->getParentNode();
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pT=dynamic_cast<const T*>(p);
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}
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return lst;
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}
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};
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/** \brief subclass representing a node in the syntax tree, that has one child
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* \ingroup jkqtmathtext_items
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*/
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class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextSingleChildNode: public JKQTMathTextNode {
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public:
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explicit JKQTMathTextSingleChildNode(JKQTMathTextNode* _child, JKQTMathText* parentMathText);
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virtual ~JKQTMathTextSingleChildNode() override;
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/** \copydoc child */
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JKQTMathTextNode* getChild();
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/** \copydoc child */
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const JKQTMathTextNode* getChild() const;
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/** \brief replaces the child node with the node \a newChild , returns the replaced old node */
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JKQTMathTextNode* replaceChild(JKQTMathTextNode* newChild);
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/** \brief replaces the child node with the node \a newChild , deletes the replaced old node */
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void replaceAndDeleteChild(JKQTMathTextNode* newChild);
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/** \brief returns \c true if the child is valie (\c !=nullptr ) */
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bool hasChild() const;
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/** \copydoc JKQTMathTextNode::setDrawBoxes() */
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virtual void setDrawBoxes(bool draw) override;
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protected:
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/** \brief child node of this node */
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JKQTMathTextNode* child;
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};
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/** \brief subclass representing a node in the syntax tree, that has two children
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* \ingroup jkqtmathtext_items
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*/
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class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextMultiChildNode: public JKQTMathTextNode {
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public:
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explicit JKQTMathTextMultiChildNode(JKQTMathText* parentMathText);
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virtual ~JKQTMathTextMultiChildNode() override;
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/** \brief returns a list of all child node */
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virtual QList<JKQTMathTextNode*> getChildren();
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/** \brief returns a list of all child node */
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virtual QList<const JKQTMathTextNode*> getChildren() const;
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/** \brief returns the i-th child node */
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virtual JKQTMathTextNode* getChild(int i)=0;
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/** \brief returns the i-th child node */
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virtual const JKQTMathTextNode* getChild(int i) const=0;
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/** \brief returns the first child node */
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virtual JKQTMathTextNode* getFirstChild();
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/** \brief returns the first child node */
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virtual const JKQTMathTextNode* getFirstChild() const;
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/** \brief returns the last child node */
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virtual JKQTMathTextNode* getLastChild();
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/** \brief returns the last child node */
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virtual const JKQTMathTextNode* getLastChild() const;
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/** \brief replaces the i-th child node with the node \a newChild , returns the replaced old node */
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virtual JKQTMathTextNode* replaceChild(int i, JKQTMathTextNode* newChild) =0;
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/** \brief replaces the i-th child node with the node \a newChild , deletes the replaced old node */
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virtual void replaceAndDeleteChild(int i, JKQTMathTextNode* newChild);
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/** \brief returns the number of child nodes */
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virtual int childCount() const =0;
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/** \brief returns \c true if children exist */
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bool hasChildren() const;
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/** \brief returns \c true if there are no children */
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bool isEmpty() const;
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/** \brief clear all children, deleting them if \a deleteChildren==true */
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virtual void clearChildren(bool deleteChildren=true) =0;
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/** \copydoc JKQTMathTextNode::setDrawBoxes() */
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virtual void setDrawBoxes(bool draw) override;
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protected:
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};
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/** \brief subclass representing a node in the syntax tree, that has two children
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* \ingroup jkqtmathtext_items
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*/
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class JKQTMATHTEXT_LIB_EXPORT JKQTMathTextDualChildNode: public JKQTMathTextMultiChildNode {
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public:
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explicit JKQTMathTextDualChildNode(JKQTMathTextNode* _child1, JKQTMathTextNode* _child2, JKQTMathText* parentMathText);
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virtual ~JKQTMathTextDualChildNode() override;
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/** \copydoc child1 */
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JKQTMathTextNode* getChild1();
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/** \copydoc child1 */
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const JKQTMathTextNode* getChild1() const;
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/** \copydoc child2 */
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JKQTMathTextNode* getChild2();
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/** \copydoc child2 */
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const JKQTMathTextNode* getChild2() const;
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/** \copydoc JKQTMathTextMultiChildNode::getChild() */
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virtual JKQTMathTextNode* getChild(int i) override;
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/** \copydoc JKQTMathTextMultiChildNode::getChild() */
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virtual const JKQTMathTextNode* getChild(int i) const override;
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/** \copydoc JKQTMathTextMultiChildNode::getChild() */
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virtual JKQTMathTextNode* replaceChild(int i, JKQTMathTextNode* newChild) override;
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/** \copydoc JKQTMathTextMultiChildNode::getChild() */
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virtual int childCount() const override;
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/** \copydoc JKQTMathTextMultiChildNode::getChild() */
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virtual void clearChildren(bool deleteChildren=true) override;
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protected:
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/** \brief first child node of this node */
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JKQTMathTextNode* child1;
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/** \brief second child node of this node */
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JKQTMathTextNode* child2;
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};
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#endif // JKQTMATHTEXTNODE_H
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