Java Document.getLength方法代码示例

import javax.swing.text.Document; //导入方法依赖的package包/类
private static int findLineNumber(Document doc, int offset) {
    int length = doc.getLength();
    String text;
    int count = 0;
    try {
        text = doc.getText(0, length);
    } catch (BadLocationException ex) { // should not happen
        Exceptions.printStackTrace(ex);
        return -1;
    }
    for (int i=0; i < length; i++) {
        if (i == offset) {
            return count;
        }
        if (text.charAt(i) == '\n') {
            count++;
            
        }
    }
    return offset==length ? count : -1;
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
static int nextCamelCasePosition(JTextComponent textComponent) {
    int offset = textComponent.getCaretPosition();
    Document doc = textComponent.getDocument();

    // Are we at the end of the document?
    if (offset == doc.getLength()) {
        return -1;
    }

    KeystrokeHandler bc = UiUtils.getBracketCompletion(doc, offset);
    if (bc != null) {
        int nextOffset = bc.getNextWordOffset(doc, offset, false);
        if (nextOffset != -1) {
            return nextOffset;
        }
    }
    
    try {
        return Utilities.getNextWord(textComponent, offset);
    } catch (BadLocationException ble) {
        // something went wrong :(
        ErrorManager.getDefault().notify(ble);
    }
    return -1;
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
@Override
public void actionPerformed(ActionEvent e) {
	JTextComponent target = getTextComponent(e);
	boolean beep = true;
	if ((target != null) && (target.isEditable())) {
		try {
			Document doc = target.getDocument();
			int ss = 0;
			int se = doc.getLength();

			if (ss != se) {
				doc.remove(ss, se - ss);
				beep = false;
			}
		} catch (BadLocationException bl) {
		}
	}
	if (beep) {
		UIManager.getLookAndFeel().provideErrorFeedback(target);
	}
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
@Override
protected void run(Context context) throws Exception {
    Document expectedDoc = getExpectedDocument(context);
    int docLen = expectedDoc.getLength();
    if (docLen == 0)
        return; // Nothing to possibly remove
    Random random = context.container().random();
    int length;
    if (REMOVE_CHAR.equals(name())) {
        length = 1;
    } else if (REMOVE_TEXT.equals(name())) {
        Integer maxLength = (Integer) context.getPropertyOrNull(REMOVE_TEXT_MAX_LENGTH);
        if (maxLength == null)
            maxLength = Integer.valueOf(10);
        if (maxLength > docLen)
            maxLength = Integer.valueOf(docLen);
        length = random.nextInt(maxLength) + 1;
    } else {
        throw new IllegalStateException("Unexpected op name=" + name());
    }
    int offset = random.nextInt(docLen - length + 1);
    remove(context, offset, length);
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
/** Return visual column (with expanded tabs) on the line.
    * @param doc document to operate on
    * @param offset position in document for which the visual column should be found
    * @return visual column on the line determined by position
    */
    public static int getVisualColumn(Document doc, int offset) throws BadLocationException {
        int docLen = doc.getLength();
        if (offset == docLen + 1) { // at ending extra '\n' => make docLen to proceed without BLE
            offset = docLen;
        }

        // TODO: fix this, do not use reflection
        try {
            Method m = findDeclaredMethod(doc.getClass(), "getVisColFromPos", Integer.TYPE); //NOI18N
            m.setAccessible(true);
            int col = (Integer) m.invoke(doc, offset);
            return col;
//            return doc.getVisColFromPos(offset);
        } catch (Exception e) {
            e.printStackTrace();
            return -1;
        }
    }
 

import javax.swing.text.Document; //导入方法依赖的package包/类
public void testOffsetInsideBackward() throws Exception {
    Document doc = new PlainDocument();
    WordMatch wordMatch = WordMatch.get(doc);
    //                   012345678901234567890123456789
    doc.insertString(0, "abc abc dab ab a xyz ab abd", null);
    int docLen = doc.getLength();
    int offset = 15;
    wordMatch.matchWord(offset, false);
    compareText(doc, offset, "aba", docLen + 2);
    wordMatch.matchWord(docLen, true);
    compareText(doc, offset, "a ", docLen);
    wordMatch.matchWord(docLen, true);
    compareText(doc, offset, "aa ", docLen + 1);
    wordMatch.matchWord(docLen, true);
    compareText(doc, offset, "xyza", docLen + 3);
    wordMatch.matchWord(docLen, true);
    compareText(doc, offset, "abda", docLen + 3);
    wordMatch.matchWord(docLen, true);
    compareText(doc, offset, "abca", docLen + 3);
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
public void testOffset0Forward() throws Exception {
    Document doc = new PlainDocument();
    WordMatch wordMatch = WordMatch.get(doc);
    //                   012345678901234567890123456789
    doc.insertString(0, "abc abc dab ab a abab+c", null);
    int docLen = doc.getLength();
    wordMatch.matchWord(0, true);
    compareText(doc, 0, "abca", docLen + 3);
    wordMatch.matchWord(0, true);
    compareText(doc, 0, "daba", docLen + 3);
    wordMatch.matchWord(0, true);
    compareText(doc, 0, "aba", docLen + 2);
    wordMatch.matchWord(0, true);
    compareText(doc, 0, "aa", docLen + 1);
    wordMatch.matchWord(0, true);
    compareText(doc, 0, "ababa", docLen + 4);
    wordMatch.matchWord(0, true);
    compareText(doc, 0, "ca", docLen + 1);
    wordMatch.matchWord(0, true);
    compareText(doc, 0, "ca", docLen + 1);

    wordMatch.matchWord(0, false);
    compareText(doc, 0, "ababa", docLen + 4);
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
@Override
public boolean charBackspaced(Document doc, int dotPos, JTextComponent target, char ch) throws BadLocationException {
    if (ch == '%' && dotPos > 0 && dotPos <= doc.getLength() - 2) {
        String s = doc.getText(dotPos - 1, 3);
        if ("<%>".equals(s)) { // NOI18N
            doc.remove(dotPos, 2);
            return true;
        }
    }

    return false;
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
public void testMultiDocs() throws Exception {
    JEditorPane pane = new JEditorPane();
    pane.setText("abc ax ec ajo");
    JFrame frame = new JFrame();
    frame.getContentPane().add(pane);
    frame.pack(); // Allows to EditorRegistry.register() to make an item in the component list
    EditorApiPackageAccessor.get().setIgnoredAncestorClass(JEditorPane.class);
    EditorApiPackageAccessor.get().register(pane);
    
    Document doc = new PlainDocument();
    WordMatch wordMatch = WordMatch.get(doc);
    //                   012345678901234567890123456789
    doc.insertString(0, "abc a x ahoj", null);
    int docLen = doc.getLength();
    int offset = 5;
    wordMatch.matchWord(offset, false);
    compareText(doc, offset - 1, "abc ", docLen + 2);
    wordMatch.matchWord(offset, false);
    compareText(doc, offset - 1, "ahoj ", docLen + 3);
    wordMatch.matchWord(offset, false);
    compareText(doc, offset - 1, "ax ", docLen + 1);
    wordMatch.matchWord(offset, false);
    compareText(doc, offset - 1, "ajo ", docLen + 2);
    wordMatch.matchWord(offset, false);
    compareText(doc, offset - 1, "ajo ", docLen + 2);
    pane.setText(""); // Ensure this doc would affect WordMatch for other docs
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
private String getContents(Document d, int startFrom) {
    try {
        int l = d.getLength() + 1;
        if (startFrom > l) {
            startFrom = l;
        }
        if (hasMoreParts()) {
            StringBuilder sb = new StringBuilder();
            for (Rng r : partOffsets) {
                if (startFrom >= r.end) {
                    continue;
                } else if (startFrom > r.start) {
                    sb.append(d.getText(startFrom, Math.min(l, r.end) - startFrom));
                } else {
                    startFrom = Math.min(l, r.start);
                    sb.append(d.getText(r.start, Math.min(l, r.end) - startFrom));
                }
            }
            return sb.toString();
        } else if (startFrom >= getEnd()) {
            return ""; // NOI18N
        } else if (startFrom > contentStart) {
            int e = Math.min(l, contentStart + getPartLen());
            return d.getText(startFrom, e - startFrom);
        } else {
            startFrom = Math.min(l, contentStart);
            return d.getText(startFrom, Math.min(l - startFrom, getPartLen()));
        }
    } catch (BadLocationException ex) {
        ex.printStackTrace();
    }
    return "";
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
@Override
    protected JComponent getComponent() {
        JTextComponent text = getTextComponent();

        if (text == null) {
            return null;
        }
        if (Config.getDefault().isAsEditor()) {
            return getEditorComponent(text);
        }
        Document document = myEditor.getDocument();

        if (document == null) {
            return null;
        }
        int start;
        int end;

        if (Config.getDefault().isSelection()) {
            start = text.getSelectionStart();
            end = text.getSelectionEnd();
        }
        else {
            start = 0;
            end = document.getLength();
        }
        AttributedCharacterIterator[] iterators = getIterators(document, start, end);
//out();
//out("iterators: " + iterators);
//out();
        if (iterators != null) {
            return new ComponentDocument(iterators);
        }
        try {
            return new ComponentDocument(text.getText(start, end - start));
        }
        catch (BadLocationException e) {
            return null;
        }
    }
 

import javax.swing.text.Document; //导入方法依赖的package包/类
private void logOp(Context context, Document doc, String msg) throws Exception {
    if (Boolean.TRUE.equals(context.round().getPropertyOrNull(RandomTestContainer.LOG_OP))) {
        StringBuilder sb = new StringBuilder(doc.getLength() + 50);
        dumpLines(sb, doc);
        sb.append("\n");
        context.container().logger().info(sb.toString());
    }

}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
public static int lineIndex2Offset(Document doc, int lineIndex) {
    javax.swing.text.Element lineRoot = doc.getDefaultRootElement();
    int offset = (lineIndex < lineRoot.getElementCount())
            ? lineRoot.getElement(lineIndex).getStartOffset()
            : doc.getLength();
    return offset;
    
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
/**
 * Bind given component and given document together.
 *
 * @param document to bind
 * @param offset position at which content of the component will be virtually placed
 * @param length how many characters replace from the original document
 * @param component component to bind
 */
public static void bindComponentToDocument(Document document, int offset, int length, JTextComponent component) {
    Parameters.notNull("document", document); //NOI18N
    Parameters.notNull("component", component); //NOI18N
    if (offset < 0 || offset > document.getLength()) {
        throw new IllegalArgumentException("Invalid offset=" + offset + "; file.size=" + document.getLength()); //NOI18N
    }
    if (length < 0 || offset + length > document.getLength()) {
        throw new IllegalArgumentException("Invalid lenght=" + length + "; offset=" + offset + ", file.size=" + document.getLength()); //NOI18N
    }
    bind(component, document, null, offset, -1, -1, length, (String)document.getProperty("mimeType")); //NOI18N
}
 

import javax.swing.text.Document; //导入方法依赖的package包/类
/**
	 * Paints icons when line wrapping is enabled.  Note that this does not
	 * override the parent class's implementation to avoid this version being
	 * called when line wrapping is disabled.
	 */
	private void paintComponentWrapped(Graphics g) {

		// The variables we use are as follows:
		// - visibleRect is the "visible" area of the text area; e.g.
		// [0,100, 300,100+(lineCount*cellHeight)-1].
		// actualTop.y is the topmost-pixel in the first logical line we
		// paint.  Note that we may well not paint this part of the logical
		// line, as it may be broken into many physical lines, with the first
		// few physical lines scrolled past.  Note also that this is NOT the
		// visible rect of this line number list; this line number list has
		// visible rect == [0,0, insets.left-1,visibleRect.height-1].

		// We avoid using modelToView/viewToModel where possible, as these
		// methods trigger a parsing of the line into syntax tokens, which is
		// costly.  It's cheaper to just grab the child views' bounds.

		RSyntaxTextArea rsta = (RSyntaxTextArea)textArea;
//		boolean currentLineHighlighted = textArea.getHighlightCurrentLine();
		Document doc = textArea.getDocument();
		Element root = doc.getDefaultRootElement();
		int topPosition = textArea.viewToModel(
								new Point(visibleRect.x,visibleRect.y));
		int topLine = root.getElementIndex(topPosition);

		int topY = visibleRect.y;
		int bottomY = visibleRect.y + visibleRect.height;
		int cellHeight = textArea.getLineHeight();

		// Paint icons
		if (trackingIcons!=null) {
			int lastLine = textArea.getLineCount() - 1;
			for (int i=trackingIcons.size()-1; i>=0; i--) { // Last to first
				GutterIconInfo ti = getTrackingIcon(i);
				Icon icon = ti.getIcon();
				if (icon!=null) {
					int iconH = icon.getIconHeight();
					int offs = ti.getMarkedOffset();
					if (offs>=0 && offs<=doc.getLength()) {
						int line = root.getElementIndex(offs);
						if (line<=lastLine && line>=topLine) {
							try {
								int lineY = rsta.yForLine(line);
								if (lineY<=bottomY && (lineY+iconH>=topY)) {
									int y2 = lineY + (cellHeight-iconH)/2;
									ti.getIcon().paintIcon(this, g, 0, y2);
									lastLine = line-1; // Paint only 1 icon per line
								}
							} catch (BadLocationException ble) {
								ble.printStackTrace(); // Never happens
							}
						}
						else if (line<topLine) {
							break; // All other lines are above us, so quit now
						}
					}
				}
			}
		}

	}