File indexing completed on 2024-04-14 03:55:39

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2002 John Firebaugh <jfirebaugh@kde.org>
     SPDX-FileCopyrightText: 2001 Anders Lund <anders@alweb.dk>
     SPDX-FileCopyrightText: 2001 Christoph Cullmann <cullmann@kde.org>
     SPDX-FileCopyrightText: 2017-2018 Friedrich W. H. Kossebau <kossebau@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #ifndef KATE_VIEW_HELPERS_H
 #define KATE_VIEW_HELPERS_H
 
 #include <KActionMenu>
 #include <KLineEdit>
 #include <KSelectAction>
 
 #include <QColor>
 #include <QHash>
 #include <QLayout>
 #include <QPixmap>
 #include <QPointer>
 #include <QScrollBar>
 #include <QTimer>
 
 #include "katetextline.h"
 #include <ktexteditor/cursor.h>
 #include <ktexteditor/message.h>
 
 namespace KTextEditor
 {
 class ViewPrivate;
 class DocumentPrivate;
 class Command;
 class AnnotationModel;
 class MovingRange;
 class AbstractAnnotationItemDelegate;
 class StyleOptionAnnotationItem;
 }
 
 class KateViewInternal;
 class KateTextLayout;
 
 #define MAXFOLDINGCOLORS 16
 
 class KateLineInfo;
 class KateTextPreview;
 
 namespace Kate
 {
 class TextRange;
 }
 
 class QTimer;
 class QVBoxLayout;
 class QStackedWidget;
 
 /**
  * Class to layout KTextEditor::Message%s in KateView. Only the floating
  * positions TopInView, CenterInView, and BottomInView are supported.
  * AboveView and BelowView are not supported and ASSERT.
  */
 class KateMessageLayout : public QLayout
 {
 public:
     explicit KateMessageLayout(QWidget *parent);
     ~KateMessageLayout() override;
 
     void addWidget(QWidget *widget, KTextEditor::Message::MessagePosition pos);
     int count() const override;
     QLayoutItem *itemAt(int index) const override;
     void setGeometry(const QRect &rect) override;
     QSize sizeHint() const override;
     QLayoutItem *takeAt(int index) override;
 
     void add(QLayoutItem *item, KTextEditor::Message::MessagePosition pos);
 
 private:
     void addItem(QLayoutItem *item) override; // never called publically
 
     struct ItemWrapper {
         ItemWrapper() = default;
         ItemWrapper(QLayoutItem *i, KTextEditor::Message::MessagePosition pos)
             : item(i)
             , position(pos)
         {
         }
 
         QLayoutItem *item = nullptr;
         KTextEditor::Message::MessagePosition position = KTextEditor::Message::AboveView;
     };
 
     QList<ItemWrapper> m_items;
 };
 
 /**
  * This class is required because QScrollBar's sliderMoved() signal is
  * really supposed to be a sliderDragged() signal... so this way we can capture
  * MMB slider moves as well
  *
  * Also, it adds some useful indicators on the scrollbar.
  */
 class KateScrollBar : public QScrollBar
 {
     Q_OBJECT
 
 public:
     KateScrollBar(Qt::Orientation orientation, class KateViewInternal *parent);
     ~KateScrollBar() override;
     QSize sizeHint() const override;
 
     void showEvent(QShowEvent *event) override;
 
     inline bool showMarks() const
     {
         return m_showMarks;
     }
     inline void setShowMarks(bool b)
     {
         m_showMarks = b;
         update();
     }
 
     inline bool showMiniMap() const
     {
         return m_showMiniMap;
     }
     void setShowMiniMap(bool b);
 
     inline bool miniMapAll() const
     {
         return m_miniMapAll;
     }
     inline void setMiniMapAll(bool b)
     {
         m_miniMapAll = b;
         updateGeometry();
         update();
     }
 
     inline bool miniMapWidth() const
     {
         return m_miniMapWidth;
     }
     inline void setMiniMapWidth(int width)
     {
         m_miniMapWidth = width;
         updateGeometry();
         update();
     }
 
     inline void queuePixmapUpdate()
     {
         m_updateTimer.start();
     }
 
 Q_SIGNALS:
     void sliderMMBMoved(int value);
 
 protected:
     void mousePressEvent(QMouseEvent *e) override;
     void mouseReleaseEvent(QMouseEvent *e) override;
     void mouseMoveEvent(QMouseEvent *e) override;
     void leaveEvent(QEvent *event) override;
     bool eventFilter(QObject *object, QEvent *event) override;
     void paintEvent(QPaintEvent *e) override;
     void resizeEvent(QResizeEvent *) override;
     void sliderChange(SliderChange change) override;
 
 protected Q_SLOTS:
     void sliderMaybeMoved(int value);
     void marksChanged();
 
 public Q_SLOTS:
     void updatePixmap();
 
 private Q_SLOTS:
     void showTextPreview();
 
 private:
     void showTextPreviewDelayed();
     void hideTextPreview();
 
     void redrawMarks();
     void recomputeMarksPositions();
 
     void miniMapPaintEvent(QPaintEvent *e);
     void normalPaintEvent(QPaintEvent *e);
 
     int minimapYToStdY(int y);
 
     struct ColumnRangeWithColor {
         int penIndex = -1;
         int startColumn;
         int endColumn;
     };
     void getCharColorRanges(const QList<Kate::TextLine::Attribute> &attributes,
                             const QList<Kate::TextRange *> &decorations,
                             const QString &text,
                             QList<KateScrollBar::ColumnRangeWithColor> &ranges,
                             QVarLengthArray<std::pair<QRgb, QPen>, 20> &penCache);
 
     bool m_middleMouseDown;
     bool m_leftMouseDown;
 
     KTextEditor::ViewPrivate *m_view;
     KTextEditor::DocumentPrivate *m_doc;
     class KateViewInternal *m_viewInternal;
     QPointer<KateTextPreview> m_textPreview;
     QTimer m_delayTextPreviewTimer;
 
     QHash<int, QColor> m_lines;
 
     bool m_showMarks;
     bool m_showMiniMap;
     bool m_miniMapAll;
     bool m_needsUpdateOnShow;
     int m_miniMapWidth;
 
     QPixmap m_pixmap;
     int m_grooveHeight;
     QRect m_stdGroveRect;
     QRect m_mapGroveRect;
     QRect m_sliderRect;
     QTimer m_updateTimer;
     QPoint m_toolTipPos;
 
     // lists of lines added/removed recently to avoid scrollbar flickering
     QHash<int, int> m_linesAdded;
 
     static const unsigned char characterOpacity[256];
 };
 
 class KateIconBorder : public QWidget
 {
     Q_OBJECT
 
 public:
     KateIconBorder(KateViewInternal *internalView, QWidget *parent);
     ~KateIconBorder() override;
     // VERY IMPORTANT ;)
     QSize sizeHint() const override;
 
     void updateFont();
     int lineNumberWidth() const;
 
     void setIconBorderOn(bool enable);
     void setLineNumbersOn(bool enable);
     void setRelLineNumbersOn(bool enable);
     void setAnnotationBorderOn(bool enable);
     void setDynWrapIndicators(int state);
     int dynWrapIndicators() const
     {
         return m_dynWrapIndicators;
     }
     bool dynWrapIndicatorsOn() const
     {
         return m_dynWrapIndicatorsOn;
     }
     void setFoldingMarkersOn(bool enable);
     void toggleIconBorder()
     {
         setIconBorderOn(!iconBorderOn());
     }
     void toggleLineNumbers()
     {
         setLineNumbersOn(!lineNumbersOn());
     }
     void toggleFoldingMarkers()
     {
         setFoldingMarkersOn(!foldingMarkersOn());
     }
     inline bool iconBorderOn() const
     {
         return m_iconBorderOn;
     }
     inline bool lineNumbersOn() const
     {
         return m_lineNumbersOn;
     }
     inline bool viRelNumbersOn() const
     {
         return m_relLineNumbersOn;
     }
     inline bool foldingMarkersOn() const
     {
         return m_foldingMarkersOn;
     }
     inline bool annotationBorderOn() const
     {
         return m_annotationBorderOn;
     }
 
     void updateForCursorLineChange();
 
     enum BorderArea { None, LineNumbers, IconBorder, FoldingMarkers, AnnotationBorder, ModificationBorder };
     BorderArea positionToArea(const QPoint &) const;
 
     KTextEditor::AbstractAnnotationItemDelegate *annotationItemDelegate() const;
     void setAnnotationItemDelegate(KTextEditor::AbstractAnnotationItemDelegate *delegate);
     inline bool uniformAnnotationItemSizes() const
     {
         return m_hasUniformAnnotationItemSizes;
     }
     inline void setAnnotationUniformItemSizes(bool enable)
     {
         m_hasUniformAnnotationItemSizes = enable;
     }
 
 public Q_SLOTS:
     void updateAnnotationBorderWidth();
     void updateAnnotationLine(int line);
     void annotationModelChanged(KTextEditor::AnnotationModel *oldmodel, KTextEditor::AnnotationModel *newmodel);
     void displayRangeChanged();
 
 private:
     void dragEnterEvent(QDragEnterEvent *) override;
     void dragMoveEvent(QDragMoveEvent *event) override;
     void dropEvent(QDropEvent *event) override;
     void paintEvent(QPaintEvent *) override;
     void paintBorder(int x, int y, int width, int height);
 
     void mousePressEvent(QMouseEvent *) override;
     void mouseMoveEvent(QMouseEvent *) override;
     void mouseReleaseEvent(QMouseEvent *) override;
     void mouseDoubleClickEvent(QMouseEvent *) override;
     void contextMenuEvent(QContextMenuEvent *e) override;
     void leaveEvent(QEvent *event) override;
     void wheelEvent(QWheelEvent *e) override;
 
     void enterEvent(QEnterEvent *e) override;
 
     void showMarkMenu(uint line, const QPoint &pos);
 
     void hideAnnotationTooltip();
     void removeAnnotationHovering();
     void showAnnotationMenu(int line, const QPoint &pos);
     void calcAnnotationBorderWidth();
 
     void initStyleOption(KTextEditor::StyleOptionAnnotationItem *styleOption) const;
     void setStyleOptionLineData(KTextEditor::StyleOptionAnnotationItem *styleOption,
                                 int y,
                                 int realLine,
                                 const KTextEditor::AnnotationModel *model,
                                 const QString &annotationGroupIdentifier) const;
     QRect annotationLineRectInView(int line) const;
 
 private:
     KTextEditor::ViewPrivate *m_view;
     KTextEditor::DocumentPrivate *m_doc;
     KateViewInternal *m_viewInternal;
 
     bool m_iconBorderOn : 1;
     bool m_lineNumbersOn : 1;
     bool m_relLineNumbersOn : 1;
     bool m_updateRelLineNumbers : 1;
     bool m_foldingMarkersOn : 1;
     bool m_dynWrapIndicatorsOn : 1;
     bool m_annotationBorderOn : 1;
     bool m_updatePositionToArea : 1;
     bool m_mouseOver = false;
 
     typedef QPair<int, KateIconBorder::BorderArea> AreaPosition;
     std::vector<AreaPosition> m_positionToArea;
 
     const int m_separatorWidth = 2;
     const int m_modAreaWidth = 3;
     qreal m_maxCharWidth = 0.0;
     int m_lineNumberAreaWidth = 0;
     int m_iconAreaWidth = 0;
     int m_foldingAreaWidth = 0;
     int m_annotationAreaWidth = 0;
     const QChar m_dynWrapIndicatorChar = QChar(0x21AA);
     int m_dynWrapIndicators = 0;
     int m_lastClickedLine = -1;
 
     KTextEditor::AbstractAnnotationItemDelegate *m_annotationItemDelegate;
     bool m_hasUniformAnnotationItemSizes = false;
     bool m_isDefaultAnnotationItemDelegate = true;
 
     QPointer<KateTextPreview> m_foldingPreview;
     KTextEditor::MovingRange *m_foldingRange = nullptr;
     int m_currentLine = -1;
     QTimer m_antiFlickerTimer;
     void highlightFoldingDelayed(int line);
     void hideFolding();
 
 private Q_SLOTS:
     void highlightFolding();
     void handleDestroyedAnnotationItemDelegate();
     void delayedUpdateOfSizeWithRepaint();
 
 private:
     QString m_hoveredAnnotationGroupIdentifier;
 };
 
 class KateViewEncodingAction : public KSelectAction
 {
 public:
     KateViewEncodingAction(KTextEditor::DocumentPrivate *_doc, KTextEditor::ViewPrivate *_view, const QString &text, QObject *parent, bool saveAsMode = false);
 
     bool setCurrentCodec(const QString &codec);
 
 private:
     void init();
     void subActionTriggered(QAction *);
 
     KTextEditor::DocumentPrivate *doc;
     KTextEditor::ViewPrivate *view;
     QAction *currentSubAction;
     const bool m_saveAsMode;
 
 private:
     void setEncoding(const QString &e);
     void slotAboutToShow();
 };
 
 class KateViewBar;
 
 class KateViewBarWidget : public QWidget
 {
     Q_OBJECT
     friend class KateViewBar;
 
 public:
     explicit KateViewBarWidget(bool addCloseButton, QWidget *parent = nullptr);
 
     virtual void closed()
     {
     }
 
     /// returns the currently associated KateViewBar and 0, if it is not associated
     KateViewBar *viewBar()
     {
         return m_viewBar;
     }
 
 protected:
     /**
      * @return widget that should be used to add controls to bar widget
      */
     QWidget *centralWidget()
     {
         return m_centralWidget;
     }
 
     /**
      * @return close button, if there
      */
     QToolButton *closeButton()
     {
         return m_closeButton;
     }
 
 Q_SIGNALS:
     void hideMe();
 
     // for friend class KateViewBar
 private:
     void setAssociatedViewBar(KateViewBar *bar)
     {
         m_viewBar = bar;
     }
 
 private:
     QWidget *m_centralWidget = nullptr;
     KateViewBar *m_viewBar = nullptr; // 0-pointer, if not added to a view bar
     QToolButton *m_closeButton = nullptr;
 };
 
 class KateViewBar : public QWidget
 {
     Q_OBJECT
 
 public:
     KateViewBar(bool external, QWidget *parent, KTextEditor::ViewPrivate *view);
 
     /**
      * Adds a widget to this viewbar.
      * Widget is initially invisible, you should call showBarWidget, to show it.
      * Several widgets can be added to the bar, but only one can be visible
      */
     void addBarWidget(KateViewBarWidget *newBarWidget);
 
     /**
      * Removes a widget from this viewbar.
      * Removing a widget makes sense if it takes a lot of space vertically,
      * because we use a QStackedWidget to maintain the same height for all
      * widgets in the viewbar.
      */
     void removeBarWidget(KateViewBarWidget *barWidget);
 
     /**
      * @return if viewbar has widget @p barWidget
      */
     bool hasBarWidget(KateViewBarWidget *barWidget) const;
 
     /**
      * Shows barWidget that was previously added with addBarWidget.
      * @see hideCurrentBarWidget
      */
     void showBarWidget(KateViewBarWidget *barWidget);
 
     /**
      * Adds widget that will be always shown in the viewbar.
      * After adding permanent widget viewbar is immediately shown.
      * ViewBar with permanent widget won't hide itself
      * until permanent widget is removed.
      * OTOH showing/hiding regular barWidgets will work as usual
      * (they will be shown above permanent widget)
      *
      * If permanent widget already exists, asserts!
      */
     void addPermanentBarWidget(KateViewBarWidget *barWidget);
 
     /**
      * Removes permanent bar widget from viewbar.
      * If no other viewbar widgets are shown, viewbar gets hidden.
      *
      * barWidget is not deleted, caller must do it if it wishes
      */
     void removePermanentBarWidget(KateViewBarWidget *barWidget);
 
     /**
      * @return true if the a KateViewBar is visible*/
     bool barWidgetVisible() const;
 
 public Q_SLOTS:
     /**
      * Hides currently shown bar widget
      */
     void hideCurrentBarWidget();
 
 protected:
     void keyPressEvent(QKeyEvent *event) override;
     void hideEvent(QHideEvent *event) override;
 
 private:
     /**
      * Shows or hides whole viewbar
      */
     void setViewBarVisible(bool visible);
 
     bool m_external;
 
 private:
     KTextEditor::ViewPrivate *m_view;
     QStackedWidget *m_stack;
     KateViewBarWidget *m_permanentBarWidget;
     QVBoxLayout *m_layout;
 };
 
 class KateCommandLineBar : public KateViewBarWidget
 {
 public:
     explicit KateCommandLineBar(KTextEditor::ViewPrivate *view, QWidget *parent = nullptr);
     ~KateCommandLineBar() override;
 
     void setText(const QString &text, bool selected = true);
     void execute(const QString &text);
 
 public:
     static void showHelpPage();
 
 private:
     class KateCmdLineEdit *m_lineEdit;
 };
 
 class KateCmdLineEdit : public KLineEdit
 {
     Q_OBJECT
 
 public:
     KateCmdLineEdit(KateCommandLineBar *bar, KTextEditor::ViewPrivate *view);
     bool event(QEvent *e) override;
 
     void hideEvent(QHideEvent *e) override;
 
 Q_SIGNALS:
     void hideRequested();
 
 public Q_SLOTS:
     void slotReturnPressed(const QString &cmd);
 
 private Q_SLOTS:
     void hideLineEdit();
 
 protected:
     void focusInEvent(QFocusEvent *ev) override;
     void keyPressEvent(QKeyEvent *ev) override;
 
 private:
     /**
      * Parse an expression denoting a position in the document.
      * Return the position as an integer.
      * Examples of expressions are "10" (the 10th line),
      * "$" (the last line), "." (the current line),
      * "'a" (the mark 'a), "/foo/" (a forwards search for "foo"),
      * and "?bar?" (a backwards search for "bar").
      * @param string the expression to parse
      * @return the position, an integer
      */
     void fromHistory(bool up);
     QString helptext(const QPoint &) const;
 
     KTextEditor::ViewPrivate *m_view;
     KateCommandLineBar *m_bar;
     bool m_msgMode;
     QString m_oldText;
     uint m_histpos; ///< position in the history
     uint m_cmdend; ///< the point where a command ends in the text, if we have a valid one.
     KTextEditor::Command *m_command; ///< For completing flags/args and interactiveness
     class KateCmdLnWhatsThis *m_help;
 
     QTimer *m_hideTimer;
 };
 
 class KateViewSchemaAction : public KActionMenu
 {
 public:
     KateViewSchemaAction(const QString &text, QObject *parent)
         : KActionMenu(text, parent)
     {
         init();
         setPopupMode(QToolButton::InstantPopup);
     }
 
     void updateMenu(KTextEditor::ViewPrivate *view);
 
 private:
     void init();
 
     QPointer<KTextEditor::ViewPrivate> m_view;
     QStringList names;
     QActionGroup *m_group;
     int last;
 
 public:
     void slotAboutToShow();
 
 private:
     void setSchema();
 };
 
 #endif