Examples of javax.swing.text.Caret

javax.swing.text.Caret
A place within a document view that represents where things can be inserted into the document model. A caret has a position in the document referred to as a dot. The dot is where the caret is currently located in the model. There is a second position maintained by the caret that represents the other end of a selection called mark. If there is no selection the dot and mark will be equal. If a selection exists, the two values will be different.
The dot can be placed by either calling setDot or moveDot. Setting the dot has the effect of removing any selection that may have previously existed. The dot and mark will be equal. Moving the dot has the effect of creating a selection as the mark is left at whatever position it previously had. @author Timothy Prinzing

        if (!(c instanceof JTextComponent)) {
            throw new IllegalArgumentException(Messages.getString("swing.77")); //$NON-NLS-1$
        }
        Dimension dim = super.getPreferredSize(c);


        Caret caret = ((JTextComponent)c).getCaret();
        if (caret != null && caret instanceof DefaultCaret) {
            dim.width += ((DefaultCaret)caret).width;
        }
        return dim;
    }

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     */
    public void showCodeEditorPopupMenu() throws AutoCompletePopupMenu.AutoCompleteException {
        
        try {
            JTextComponent editorPane = editor.getEditorComponent();
            Caret caret = editorPane.getCaret();
            final int caretPos = Math.min(caret.getMark(), caret.getDot());            
            Point location = editorPane.getUI().modelToView(editorPane, caretPos).getLocation();
            int height = editorPane.getFontMetrics(editorPane.getFont()).getHeight();
            location = new Point (location.x, location.y + height);
            try {
                autoCompletePopup.start(perspective, editor.getEditorComponent(), location);

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            // Obtain the offset where to jump
            pos = Utilities.getRowStartFromLineOffset(doc, line);
        }


        if (pos != -1) {
            Caret caret = pane.getCaret();
            if (caret instanceof BaseCaret) { // support extended scroll mode
                BaseCaret bCaret = (BaseCaret)caret;
                bCaret.setDot(pos, bCaret, EditorUI.SCROLL_FIND);
            }
            else {
                caret.setDot(pos);
            }
        }
    }

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            if (getEditor(e).isEditable()) {
                return;
            }


            JEditorPane editor = getEditor(e);
            Caret caret = editor.getCaret();
            HTMLDocument doc = getHTMLDocument(editor);


            Element link = getNextLinkElement(doc, caret.getDot(), isForward());
            if (link != null) {
                moveHighlight(editor,
                              link.getStartOffset(), link.getEndOffset());
            }
        }

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        installDefaults();
        LookAndFeel.installProperty(component, StringConstants.OPAQUE_PROPERTY,
                                    Boolean.TRUE);


        if (Utilities.isUIResource(component.getCaret())) {
            Caret caret = createCaret();
            component.setCaret(caret);
            caret.setBlinkRate(UIManager.getInt(getPropertyPrefix()
                                                  + ".caretBlinkRate"));
        }


        if (Utilities.isUIResource(component.getHighlighter())) {
            component.setHighlighter(createHighlighter());

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        final Document doc = document;
        
        readLock(doc);
        try {
            Highlighter highlighter = component.getHighlighter();
            Caret caret = component.getCaret();
            if (component.isOpaque()) {
                paintBackground(g);
            }
            if (highlighter != null) {
                highlighter.paint(g);
            }
            Rectangle visibleRect = getVisibleEditorRect();
            if (visibleRect != null) {
                getRootView().setSize(visibleRect.width, visibleRect.height);
                getRootView().paint(g, visibleRect);
            }
            caret.paint(g);
        } finally {
            readUnlock(doc);
        }
    }

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            if (getEditor(e).isEditable()) {
                return;
            }


            JEditorPane editor = getEditor(e);
            Caret caret = editor.getCaret();
            HTMLDocument doc = getHTMLDocument(editor);


            Element link = getNextLinkElement(doc, caret.getDot(), isForward());
            if (link != null) {
                moveHighlight(editor,
                              link.getStartOffset(), link.getEndOffset());
            }
        }

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        installDefaults();
        LookAndFeel.installProperty(component, StringConstants.OPAQUE_PROPERTY,
                                    Boolean.TRUE);


        if (Utilities.isUIResource(component.getCaret())) {
            Caret caret = createCaret();
            component.setCaret(caret);
            caret.setBlinkRate(UIManager.getInt(getPropertyPrefix()
                                                  + ".caretBlinkRate"));
        }


        if (Utilities.isUIResource(component.getHighlighter())) {
            component.setHighlighter(createHighlighter());

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            return;
        }
        readLock();
        try {
            Highlighter highlighter = component.getHighlighter();
            Caret caret = component.getCaret();
            if (component.isOpaque()) {
                paintBackground(g);
            }
            if (highlighter != null) {
                highlighter.paint(g);
            }
            Rectangle visibleRect = getVisibleEditorRect();
            if (visibleRect != null) {
                getRootView().setSize(visibleRect.width, visibleRect.height);
                getRootView().paint(g, visibleRect);
            }
            caret.paint(g);
        } finally {
            readUnlock();
        }
    }

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        Highlighter highlighter = basicTextUI.createHighlighter();
        assertTrue(highlighter instanceof BasicTextUI.BasicHighlighter);
    }


    public void testCreateCaret() {
        Caret caret = basicTextUI.createCaret();
        assertTrue(caret instanceof BasicTextUI.BasicCaret);
    }

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