File	Doc	Category	Size	Date	Package
TextMeasurer.java	API Doc	Android 1.5 API	6037	Wed May 06 22:41:54 BST 2009	java.awt.font

TextMeasurer

• java.lang.Object

Fields Summary
AttributedCharacterIterator	aci The aci.
FontRenderContext	frc The frc.
org.apache.harmony.awt.gl.font.TextRunBreaker	breaker The breaker.
org.apache.harmony.awt.gl.font.TextMetricsCalculator	tmc The tmc.

Constructors Summary
public TextMeasurer(AttributedCharacterIterator text, FontRenderContext frc) Instantiates a new text measurer from the specified text. param text the source text. param frc the FontRenderContext. this.aci = text; this.frc = frc; breaker = new TextRunBreaker(aci, this.frc); tmc = new TextMetricsCalculator(breaker);

Methods Summary
protected java.lang.Object	clone() Returns a copy of this object. return a copy of this object. return new TextMeasurer((AttributedCharacterIterator)aci.clone(), frc);
public void	deleteChar(java.text.AttributedCharacterIterator newParagraph, int deletePos) Replaces the current text with the new text and deletes a character at the specified position. param newParagraph the paragraph text after deletion. param deletePos the position in the text where the character is removed. AttributedCharacterIterator oldAci = aci; aci = newParagraph; if ((oldAci.getEndIndex() - oldAci.getBeginIndex()) - (aci.getEndIndex() - aci.getBeginIndex()) != 1) { breaker = new TextRunBreaker(aci, this.frc); tmc = new TextMetricsCalculator(breaker); } else { breaker.deleteChar(newParagraph, deletePos); }
public float	getAdvanceBetween(int start, int end) Returns the graphical width of a line beginning at "start" parameter and including characters up to "end" parameter. "start" and "end" are absolute indices, not relative to the "start" of the paragraph. param start the character index at which to start measuring. param end the character index at which to stop measuring. return the graphical width of a line beginning at "start" and including characters up to "end". breaker.pushSegments(start - aci.getBeginIndex(), end - aci.getBeginIndex()); breaker.createAllSegments(); float retval = tmc.createMetrics().getAdvance(); breaker.popSegments(); return retval;
public java.awt.font.TextLayout	getLayout(int start, int limit) Returns a TextLayout of the specified character range. param start the index of the first character. param limit the index after the last character. return a TextLayout for the characters beginning at "start" up to "end". breaker.pushSegments(start - aci.getBeginIndex(), limit - aci.getBeginIndex()); breaker.createAllSegments(); TextLayout layout = new TextLayout((TextRunBreaker)breaker.clone()); breaker.popSegments(); return layout;
public int	getLineBreakIndex(int start, float maxAdvance) Returns the index of the first character which is not fit on a line beginning at start and possible measuring up to maxAdvance in graphical width. param start he character index at which to start measuring. param maxAdvance the graphical width in which the line must fit. return the index after the last character that is fit on a line beginning at start, which is not longer than maxAdvance in graphical width. breaker.createAllSegments(); return breaker.getLineBreakIndex(start - aci.getBeginIndex(), maxAdvance) + aci.getBeginIndex();
public void	insertChar(java.text.AttributedCharacterIterator newParagraph, int insertPos) Replaces the current text with the new text, inserting a break character at the specified insert position. param newParagraph the new paragraph text. param insertPos the position in the text where the character is inserted. AttributedCharacterIterator oldAci = aci; aci = newParagraph; if ((oldAci.getEndIndex() - oldAci.getBeginIndex()) - (aci.getEndIndex() - aci.getBeginIndex()) != -1) { breaker = new TextRunBreaker(aci, this.frc); tmc = new TextMetricsCalculator(breaker); } else { breaker.insertChar(newParagraph, insertPos); }