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Diffstat (limited to 'awt/java/awt/font/TextLayout.java')
| -rw-r--r-- | awt/java/awt/font/TextLayout.java | 927 |
1 files changed, 0 insertions, 927 deletions
diff --git a/awt/java/awt/font/TextLayout.java b/awt/java/awt/font/TextLayout.java deleted file mode 100644 index cc6f0ba..0000000 --- a/awt/java/awt/font/TextLayout.java +++ /dev/null @@ -1,927 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -/** - * @author Oleg V. Khaschansky - * @version $Revision$ - */ - -package java.awt.font; - -import java.awt.Font; -import java.awt.Graphics2D; -import java.awt.Shape; -import java.awt.geom.AffineTransform; -import java.awt.geom.Rectangle2D; -import java.awt.geom.GeneralPath; -import java.text.AttributedCharacterIterator; -import java.text.AttributedString; -import java.util.Map; - -import org.apache.harmony.awt.gl.font.BasicMetrics; -import org.apache.harmony.awt.gl.font.CaretManager; -import org.apache.harmony.awt.gl.font.TextMetricsCalculator; -import org.apache.harmony.awt.gl.font.TextRunBreaker; -import org.apache.harmony.awt.internal.nls.Messages; - -/** - * The TextLayout class defines the graphical representation of character data. - * This class provides method for obtaining information about cursor positioning - * and movement, split cursors for text with different directions, logical and - * visual highlighting, multiple baselines, hits, justification, ascent, - * descent, and advance, and rendering. A TextLayout object can be rendered - * using Graphics context. - * - * @since Android 1.0 - */ -public final class TextLayout implements Cloneable { - - /** - * The CaretPolicy class provides a policy for obtaining the caret location. - * The single getStrongCaret method specifies the policy. - */ - public static class CaretPolicy { - - /** - * Instantiates a new CaretPolicy. - */ - public CaretPolicy() { - // Nothing to do - } - - /** - * Returns whichever of the two specified TextHitInfo objects has the - * stronger caret (higher character level) in the specified TextLayout. - * - * @param hit1 - * the first TextHitInfo of the specified TextLayout. - * @param hit2 - * the second TextHitInfo of the specified TextLayout. - * @param layout - * the TextLayout. - * @return the TextHitInfo with the stronger caret. - */ - public TextHitInfo getStrongCaret(TextHitInfo hit1, TextHitInfo hit2, TextLayout layout) { - // Stronger hit is the one with greater level. - // If the level is same, leading edge is stronger. - - int level1 = layout.getCharacterLevel(hit1.getCharIndex()); - int level2 = layout.getCharacterLevel(hit2.getCharIndex()); - - if (level1 == level2) { - return (hit2.isLeadingEdge() && (!hit1.isLeadingEdge())) ? hit2 : hit1; - } - return level1 > level2 ? hit1 : hit2; - } - - } - - /** - * The Constant DEFAULT_CARET_POLICY indicates the default caret policy. - */ - public static final TextLayout.CaretPolicy DEFAULT_CARET_POLICY = new CaretPolicy(); - - /** - * The breaker. - */ - private TextRunBreaker breaker; - - /** - * The metrics valid. - */ - private boolean metricsValid = false; - - /** - * The tmc. - */ - private TextMetricsCalculator tmc; - - /** - * The metrics. - */ - private BasicMetrics metrics; - - /** - * The caret manager. - */ - private CaretManager caretManager; - - /** - * The justification width. - */ - float justificationWidth = -1; - - /** - * Instantiates a new TextLayout object from the specified string and Font. - * - * @param string - * the string to be displayed. - * @param font - * the font of the text. - * @param frc - * the FontRenderContext object for obtaining information about a - * graphics device. - */ - public TextLayout(String string, Font font, FontRenderContext frc) { - if (string == null) { - // awt.01='{0}' parameter is null - throw new IllegalArgumentException(Messages.getString("awt.01", "string")); //$NON-NLS-1$ //$NON-NLS-2$ - } - - if (font == null) { - // awt.01='{0}' parameter is null - throw new IllegalArgumentException(Messages.getString("awt.01", "font")); //$NON-NLS-1$ //$NON-NLS-2$ - } - - if (string.length() == 0) { - // awt.02='{0}' parameter has zero length - throw new IllegalArgumentException(Messages.getString("awt.02", "string")); //$NON-NLS-1$ //$NON-NLS-2$ - } - - AttributedString as = new AttributedString(string); - as.addAttribute(TextAttribute.FONT, font); - this.breaker = new TextRunBreaker(as.getIterator(), frc); - caretManager = new CaretManager(breaker); - } - - /** - * Instantiates a new TextLayout from the specified text and a map of - * attributes. - * - * @param string - * the string to be displayed. - * @param attributes - * the attributes to be used for obtaining the text style. - * @param frc - * the FontRenderContext object for obtaining information about a - * graphics device. - */ - public TextLayout(String string, - Map<? extends java.text.AttributedCharacterIterator.Attribute, ?> attributes, - FontRenderContext frc) { - if (string == null) { - // awt.01='{0}' parameter is null - throw new IllegalArgumentException(Messages.getString("awt.01", "string")); //$NON-NLS-1$ //$NON-NLS-2$ - } - - if (attributes == null) { - // awt.01='{0}' parameter is null - throw new IllegalArgumentException(Messages.getString("awt.01", "attributes")); //$NON-NLS-1$ //$NON-NLS-2$ - } - - if (string.length() == 0) { - // awt.02='{0}' parameter has zero length - throw new IllegalArgumentException(Messages.getString("awt.02", "string")); //$NON-NLS-1$ //$NON-NLS-2$ - } - - AttributedString as = new AttributedString(string); - as.addAttributes(attributes, 0, string.length()); - this.breaker = new TextRunBreaker(as.getIterator(), frc); - caretManager = new CaretManager(breaker); - } - - /** - * Instantiates a new TextLayout from the AttributedCharacterIterator. - * - * @param text - * the AttributedCharacterIterator. - * @param frc - * the FontRenderContext object for obtaining information about a - * graphics device. - */ - public TextLayout(AttributedCharacterIterator text, FontRenderContext frc) { - if (text == null) { - // awt.03='{0}' iterator parameter is null - throw new IllegalArgumentException(Messages.getString("awt.03", "text")); //$NON-NLS-1$ //$NON-NLS-2$ - } - - if (text.getBeginIndex() == text.getEndIndex()) { - // awt.04='{0}' iterator parameter has zero length - throw new IllegalArgumentException(Messages.getString("awt.04", "text")); //$NON-NLS-1$ //$NON-NLS-2$ - } - - this.breaker = new TextRunBreaker(text, frc); - caretManager = new CaretManager(breaker); - } - - /** - * Instantiates a new text layout. - * - * @param breaker - * the breaker. - */ - TextLayout(TextRunBreaker breaker) { - this.breaker = breaker; - caretManager = new CaretManager(this.breaker); - } - - /** - * Returns a hash code of this TextLayout object. - * - * @return a hash code of this TextLayout object. - */ - @Override - public int hashCode() { - return breaker.hashCode(); - } - - /** - * Returns a copy of this object. - * - * @return a copy of this object. - */ - @Override - protected Object clone() { - TextLayout res = new TextLayout((TextRunBreaker)breaker.clone()); - - if (justificationWidth >= 0) { - res.handleJustify(justificationWidth); - } - - return res; - } - - /** - * Compares this TextLayout object to the specified TextLayout object. - * - * @param layout - * the TextLayout object to be compared. - * @return true, if this TextLayout object is equal to the specified - * TextLayout object, false otherwise. - */ - public boolean equals(TextLayout layout) { - if (layout == null) { - return false; - } - return this.breaker.equals(layout.breaker); - } - - /** - * Compares this TextLayout object to the specified Object. - * - * @param obj - * the Object to be compared. - * @return true, if this TextLayout object is equal to the specified Object, - * false otherwise. - */ - @Override - public boolean equals(Object obj) { - return obj instanceof TextLayout ? equals((TextLayout)obj) : false; - } - - /** - * Gets the string representation for this TextLayout. - * - * @return the string representation for this TextLayout. - */ - @Override - public String toString() { // what for? - return super.toString(); - } - - /** - * Draws this TextLayout at the specified location with the specified - * Graphics2D context. - * - * @param g2d - * the Graphics2D object which renders this TextLayout. - * @param x - * the X coordinate of the TextLayout origin. - * @param y - * the Y coordinate of the TextLayout origin. - */ - public void draw(Graphics2D g2d, float x, float y) { - updateMetrics(); - breaker.drawSegments(g2d, x, y); - } - - /** - * Update metrics. - */ - private void updateMetrics() { - if (!metricsValid) { - breaker.createAllSegments(); - tmc = new TextMetricsCalculator(breaker); - metrics = tmc.createMetrics(); - metricsValid = true; - } - } - - /** - * Gets the advance of this TextLayout object. - * - * @return the advance of this TextLayout object. - */ - public float getAdvance() { - updateMetrics(); - return metrics.getAdvance(); - } - - /** - * Gets the ascent of this TextLayout object. - * - * @return the ascent of this TextLayout object. - */ - public float getAscent() { - updateMetrics(); - return metrics.getAscent(); - } - - /** - * Gets the baseline of this TextLayout object. - * - * @return the baseline of this TextLayout object. - */ - public byte getBaseline() { - updateMetrics(); - return (byte)metrics.getBaseLineIndex(); - } - - /** - * Gets the float array of offsets for the baselines which are used in this - * TextLayout. - * - * @return the float array of offsets for the baselines which are used in - * this TextLayout. - */ - public float[] getBaselineOffsets() { - updateMetrics(); - return tmc.getBaselineOffsets(); - } - - /** - * Gets the black box bounds of the characters in the specified area. The - * black box bounds is an Shape which contains all bounding boxes of all the - * glyphs of the characters between firstEndpoint and secondEndpoint - * parameters values. - * - * @param firstEndpoint - * the first point of the area. - * @param secondEndpoint - * the second point of the area. - * @return the Shape which contains black box bounds. - */ - public Shape getBlackBoxBounds(int firstEndpoint, int secondEndpoint) { - updateMetrics(); - if (firstEndpoint < secondEndpoint) { - return breaker.getBlackBoxBounds(firstEndpoint, secondEndpoint); - } - return breaker.getBlackBoxBounds(secondEndpoint, firstEndpoint); - } - - /** - * Gets the bounds of this TextLayout. - * - * @return the bounds of this TextLayout. - */ - public Rectangle2D getBounds() { - updateMetrics(); - return breaker.getVisualBounds(); - } - - /** - * Gets information about the caret of the specified TextHitInfo. - * - * @param hitInfo - * the TextHitInfo. - * @return the information about the caret of the specified TextHitInfo. - */ - public float[] getCaretInfo(TextHitInfo hitInfo) { - updateMetrics(); - return caretManager.getCaretInfo(hitInfo); - } - - /** - * Gets information about the caret of the specified TextHitInfo of a - * character in this TextLayout. - * - * @param hitInfo - * the TextHitInfo of a character in this TextLayout. - * @param bounds - * the bounds to which the caret info is constructed. - * @return the caret of the specified TextHitInfo. - */ - public float[] getCaretInfo(TextHitInfo hitInfo, Rectangle2D bounds) { - updateMetrics(); - return caretManager.getCaretInfo(hitInfo); - } - - /** - * Gets a Shape which represents the caret of the specified TextHitInfo in - * the bounds of this TextLayout. - * - * @param hitInfo - * the TextHitInfo. - * @param bounds - * the bounds to which the caret info is constructed. - * @return the Shape which represents the caret. - */ - public Shape getCaretShape(TextHitInfo hitInfo, Rectangle2D bounds) { - updateMetrics(); - return caretManager.getCaretShape(hitInfo, this); - } - - /** - * Gets a Shape which represents the caret of the specified TextHitInfo in - * the bounds of this TextLayout. - * - * @param hitInfo - * the TextHitInfo. - * @return the Shape which represents the caret. - */ - public Shape getCaretShape(TextHitInfo hitInfo) { - updateMetrics(); - return caretManager.getCaretShape(hitInfo, this); - } - - /** - * Gets two Shapes for the strong and weak carets with default caret policy - * and null bounds: the first element is the strong caret, the second is the - * weak caret or null. - * - * @param offset - * an offset in the TextLayout. - * @return an array of two Shapes corresponded to the strong and weak - * carets. - */ - public Shape[] getCaretShapes(int offset) { - return getCaretShapes(offset, null, TextLayout.DEFAULT_CARET_POLICY); - } - - /** - * Gets two Shapes for the strong and weak carets with the default caret - * policy: the first element is the strong caret, the second is the weak - * caret or null. - * - * @param offset - * an offset in the TextLayout. - * @param bounds - * the bounds to which to extend the carets. - * @return an array of two Shapes corresponded to the strong and weak - * carets. - */ - public Shape[] getCaretShapes(int offset, Rectangle2D bounds) { - return getCaretShapes(offset, bounds, TextLayout.DEFAULT_CARET_POLICY); - } - - /** - * Gets two Shapes for the strong and weak carets: the first element is the - * strong caret, the second is the weak caret or null. - * - * @param offset - * an offset in the TextLayout. - * @param bounds - * the bounds to which to extend the carets. - * @param policy - * the specified CaretPolicy. - * @return an array of two Shapes corresponded to the strong and weak - * carets. - */ - public Shape[] getCaretShapes(int offset, Rectangle2D bounds, TextLayout.CaretPolicy policy) { - if (offset < 0 || offset > breaker.getCharCount()) { - // awt.195=Offset is out of bounds - throw new IllegalArgumentException(Messages.getString("awt.195")); //$NON-NLS-1$ - } - - updateMetrics(); - return caretManager.getCaretShapes(offset, bounds, policy, this); - } - - /** - * Gets the number of characters in this TextLayout. - * - * @return the number of characters in this TextLayout. - */ - public int getCharacterCount() { - return breaker.getCharCount(); - } - - /** - * Gets the level of the character with the specified index. - * - * @param index - * the specified index of the character. - * @return the level of the character. - */ - public byte getCharacterLevel(int index) { - if (index == -1 || index == getCharacterCount()) { - return (byte)breaker.getBaseLevel(); - } - return breaker.getLevel(index); - } - - /** - * Gets the descent of this TextLayout. - * - * @return the descent of this TextLayout. - */ - public float getDescent() { - updateMetrics(); - return metrics.getDescent(); - } - - /** - * Gets the TextLayout wich is justified with the specified width related to - * this TextLayout. - * - * @param justificationWidth - * the width which is used for justification. - * @return a TextLayout justified to the specified width. - * @throws Error - * the error occures if this TextLayout has been already - * justified. - */ - public TextLayout getJustifiedLayout(float justificationWidth) throws Error { - float justification = breaker.getJustification(); - - if (justification < 0) { - // awt.196=Justification impossible, layout already justified - throw new Error(Messages.getString("awt.196")); //$NON-NLS-1$ - } else if (justification == 0) { - return this; - } - - TextLayout justifiedLayout = new TextLayout((TextRunBreaker)breaker.clone()); - justifiedLayout.handleJustify(justificationWidth); - return justifiedLayout; - } - - /** - * Gets the leading of this TextLayout. - * - * @return the leading of this TextLayout. - */ - public float getLeading() { - updateMetrics(); - return metrics.getLeading(); - } - - /** - * Gets a Shape representing the logical selection betweeen the specified - * endpoints and extended to the natural bounds of this TextLayout. - * - * @param firstEndpoint - * the first selected endpoint within the area of characters - * @param secondEndpoint - * the second selected endpoint within the area of characters - * @return a Shape represented the logical selection betweeen the specified - * endpoints. - */ - public Shape getLogicalHighlightShape(int firstEndpoint, int secondEndpoint) { - updateMetrics(); - return getLogicalHighlightShape(firstEndpoint, secondEndpoint, breaker.getLogicalBounds()); - } - - /** - * Gets a Shape representing the logical selection betweeen the specified - * endpoints and extended to the specified bounds of this TextLayout. - * - * @param firstEndpoint - * the first selected endpoint within the area of characters - * @param secondEndpoint - * the second selected endpoint within the area of characters - * @param bounds - * the specified bounds of this TextLayout. - * @return a Shape represented the logical selection betweeen the specified - * endpoints. - */ - public Shape getLogicalHighlightShape(int firstEndpoint, int secondEndpoint, Rectangle2D bounds) { - updateMetrics(); - - if (firstEndpoint > secondEndpoint) { - if (secondEndpoint < 0 || firstEndpoint > breaker.getCharCount()) { - // awt.197=Endpoints are out of range - throw new IllegalArgumentException(Messages.getString("awt.197")); //$NON-NLS-1$ - } - return caretManager.getLogicalHighlightShape(secondEndpoint, firstEndpoint, bounds, - this); - } - if (firstEndpoint < 0 || secondEndpoint > breaker.getCharCount()) { - // awt.197=Endpoints are out of range - throw new IllegalArgumentException(Messages.getString("awt.197")); //$NON-NLS-1$ - } - return caretManager.getLogicalHighlightShape(firstEndpoint, secondEndpoint, bounds, this); - } - - /** - * Gets the logical ranges of text which corresponds to a visual selection. - * - * @param hit1 - * the first endpoint of the visual range. - * @param hit2 - * the second endpoint of the visual range. - * @return the logical ranges of text which corresponds to a visual - * selection. - */ - public int[] getLogicalRangesForVisualSelection(TextHitInfo hit1, TextHitInfo hit2) { - return caretManager.getLogicalRangesForVisualSelection(hit1, hit2); - } - - /** - * Gets the TextHitInfo for the next caret to the left (or up at the end of - * the line) of the specified offset. - * - * @param offset - * the offset in this TextLayout. - * @return the TextHitInfo for the next caret to the left (or up at the end - * of the line) of the specified hit, or null if there is no hit. - */ - public TextHitInfo getNextLeftHit(int offset) { - return getNextLeftHit(offset, DEFAULT_CARET_POLICY); - } - - /** - * Gets the TextHitInfo for the next caret to the left (or up at the end of - * the line) of the specified hit. - * - * @param hitInfo - * the initial hit. - * @return the TextHitInfo for the next caret to the left (or up at the end - * of the line) of the specified hit, or null if there is no hit. - */ - public TextHitInfo getNextLeftHit(TextHitInfo hitInfo) { - breaker.createAllSegments(); - return caretManager.getNextLeftHit(hitInfo); - } - - /** - * Gets the TextHitInfo for the next caret to the left (or up at the end of - * the line) of the specified offset, given the specified caret policy. - * - * @param offset - * the offset in this TextLayout. - * @param policy - * the policy to be used for obtaining the strong caret. - * @return the TextHitInfo for the next caret to the left of the specified - * offset, or null if there is no hit. - */ - public TextHitInfo getNextLeftHit(int offset, TextLayout.CaretPolicy policy) { - if (offset < 0 || offset > breaker.getCharCount()) { - // awt.195=Offset is out of bounds - throw new IllegalArgumentException(Messages.getString("awt.195")); //$NON-NLS-1$ - } - - TextHitInfo hit = TextHitInfo.afterOffset(offset); - TextHitInfo strongHit = policy.getStrongCaret(hit, hit.getOtherHit(), this); - TextHitInfo nextLeftHit = getNextLeftHit(strongHit); - - if (nextLeftHit != null) { - return policy.getStrongCaret(getVisualOtherHit(nextLeftHit), nextLeftHit, this); - } - return null; - } - - /** - * Gets the TextHitInfo for the next caret to the right (or down at the end - * of the line) of the specified hit. - * - * @param hitInfo - * the initial hit. - * @return the TextHitInfo for the next caret to the right (or down at the - * end of the line) of the specified hit, or null if there is no - * hit. - */ - public TextHitInfo getNextRightHit(TextHitInfo hitInfo) { - breaker.createAllSegments(); - return caretManager.getNextRightHit(hitInfo); - } - - /** - * Gets the TextHitInfo for the next caret to the right (or down at the end - * of the line) of the specified offset. - * - * @param offset - * the offset in this TextLayout. - * @return the TextHitInfo for the next caret to the right of the specified - * offset, or null if there is no hit. - */ - public TextHitInfo getNextRightHit(int offset) { - return getNextRightHit(offset, DEFAULT_CARET_POLICY); - } - - /** - * Gets the TextHitInfo for the next caret to the right (or down at the end - * of the line) of the specified offset, given the specified caret policy. - * - * @param offset - * the offset in this TextLayout. - * @param policy - * the policy to be used for obtaining the strong caret. - * @return the TextHitInfo for the next caret to the right of the specified - * offset, or null if there is no hit. - */ - public TextHitInfo getNextRightHit(int offset, TextLayout.CaretPolicy policy) { - if (offset < 0 || offset > breaker.getCharCount()) { - // awt.195=Offset is out of bounds - throw new IllegalArgumentException(Messages.getString("awt.195")); //$NON-NLS-1$ - } - - TextHitInfo hit = TextHitInfo.afterOffset(offset); - TextHitInfo strongHit = policy.getStrongCaret(hit, hit.getOtherHit(), this); - TextHitInfo nextRightHit = getNextRightHit(strongHit); - - if (nextRightHit != null) { - return policy.getStrongCaret(getVisualOtherHit(nextRightHit), nextRightHit, this); - } - return null; - } - - /** - * Gets the outline of this TextLayout as a Shape. - * - * @param xform - * the AffineTransform to be used to transform the outline before - * returning it, or null if no transformation is desired. - * @return the outline of this TextLayout as a Shape. - */ - public Shape getOutline(AffineTransform xform) { - breaker.createAllSegments(); - - GeneralPath outline = breaker.getOutline(); - - if (outline != null && xform != null) { - outline.transform(xform); - } - - return outline; - } - - /** - * Gets the visible advance of this TextLayout which is defined as diffence - * between leading (advance) and trailing whitespace. - * - * @return the visible advance of this TextLayout. - */ - public float getVisibleAdvance() { - updateMetrics(); - - // Trailing whitespace _SHOULD_ be reordered (Unicode spec) to - // base direction, so it is also trailing - // in logical representation. We use this fact. - int lastNonWhitespace = breaker.getLastNonWhitespace(); - - if (lastNonWhitespace < 0) { - return 0; - } else if (lastNonWhitespace == getCharacterCount() - 1) { - return getAdvance(); - } else if (justificationWidth >= 0) { // Layout is justified - return justificationWidth; - } else { - breaker.pushSegments(breaker.getACI().getBeginIndex(), lastNonWhitespace - + breaker.getACI().getBeginIndex() + 1); - - breaker.createAllSegments(); - - float visAdvance = tmc.createMetrics().getAdvance(); - - breaker.popSegments(); - return visAdvance; - } - } - - /** - * Gets a Shape which corresponds to the highlighted (selected) area based - * on two hit locations within the text and extends to the bounds. - * - * @param hit1 - * the first text hit location. - * @param hit2 - * the second text hit location. - * @param bounds - * the rectangle that the highlighted area should be extended or - * restricted to. - * @return a Shape which corresponds to the highlighted (selected) area. - */ - public Shape getVisualHighlightShape(TextHitInfo hit1, TextHitInfo hit2, Rectangle2D bounds) { - return caretManager.getVisualHighlightShape(hit1, hit2, bounds, this); - } - - /** - * Gets a Shape which corresponds to the highlighted (selected) area based - * on two hit locations within the text. - * - * @param hit1 - * the first text hit location. - * @param hit2 - * the second text hit location. - * @return a Shape which corresponds to the highlighted (selected) area. - */ - public Shape getVisualHighlightShape(TextHitInfo hit1, TextHitInfo hit2) { - breaker.createAllSegments(); - return caretManager.getVisualHighlightShape(hit1, hit2, breaker.getLogicalBounds(), this); - } - - /** - * Gets the TextHitInfo for a hit on the opposite side of the specified - * hit's caret. - * - * @param hitInfo - * the specified TextHitInfo. - * @return the TextHitInfo for a hit on the opposite side of the specified - * hit's caret. - */ - public TextHitInfo getVisualOtherHit(TextHitInfo hitInfo) { - return caretManager.getVisualOtherHit(hitInfo); - } - - /** - * Justifies the text; this method should be overridden by subclasses. - * - * @param justificationWidth - * the width for justification. - */ - protected void handleJustify(float justificationWidth) { - float justification = breaker.getJustification(); - - if (justification < 0) { - // awt.196=Justification impossible, layout already justified - throw new IllegalStateException(Messages.getString("awt.196")); //$NON-NLS-1$ - } else if (justification == 0) { - return; - } - - float gap = (justificationWidth - getVisibleAdvance()) * justification; - breaker.justify(gap); - this.justificationWidth = justificationWidth; - - // Correct metrics - tmc = new TextMetricsCalculator(breaker); - tmc.correctAdvance(metrics); - } - - /** - * Returns a TextHitInfo object that gives information on which division - * point (between two characters) is corresponds to a hit (such as a mouse - * click) at the specified coordinates. - * - * @param x - * the X coordinate in this TextLayout. - * @param y - * the Y coordinate in this TextLayout. TextHitInfo object - * corresponding to the given coordinates within the text. - * @return the information about the character at the specified position. - */ - public TextHitInfo hitTestChar(float x, float y) { - return hitTestChar(x, y, getBounds()); - } - - /** - * Returns a TextHitInfo object that gives information on which division - * point (between two characters) is corresponds to a hit (such as a mouse - * click) at the specified coordinates within the specified text rectangle. - * - * @param x - * the X coordinate in this TextLayout. - * @param y - * the Y coordinate in this TextLayout. - * @param bounds - * the bounds of the text area. TextHitInfo object corresponding - * to the given coordinates within the text. - * @return the information about the character at the specified position. - */ - public TextHitInfo hitTestChar(float x, float y, Rectangle2D bounds) { - if (x > bounds.getMaxX()) { - return breaker.isLTR() ? TextHitInfo.trailing(breaker.getCharCount() - 1) : TextHitInfo - .leading(0); - } - - if (x < bounds.getMinX()) { - return breaker.isLTR() ? TextHitInfo.leading(0) : TextHitInfo.trailing(breaker - .getCharCount() - 1); - } - - return breaker.hitTest(x, y); - } - - /** - * Returns true if this TextLayout has a "left to right" direction. - * - * @return true if this TextLayout has a "left to right" direction, false if - * this TextLayout has a "right to left" direction. - */ - public boolean isLeftToRight() { - return breaker.isLTR(); - } - - /** - * Returns true if this TextLayout is vertical, false otherwise. - * - * @return true if this TextLayout is vertical, false if horizontal. - */ - public boolean isVertical() { - return false; - } -} |