Class FormFieldValueNonTrimmingTextRenderer

java.lang.Object

com.itextpdf.layout.renderer.AbstractRenderer

com.itextpdf.layout.renderer.TextRenderer

com.itextpdf.forms.form.renderer.FormFieldValueNonTrimmingTextRenderer

All Implemented Interfaces:

IPropertyContainer, ILeafElementRenderer, IRenderer

class FormFieldValueNonTrimmingTextRenderer
extends TextRenderer

Custom implementation for rendering form field values. It makes sure that text value trimming strategy matches Acrobat's behavior

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	callTrimFirst

Fields inherited from class TextRenderer

line, otfFeaturesApplied, reversedRanges, savedWordBreakAtLineEnding, strToBeConverted, tabAnchorCharacterPosition, text, TEXT_SPACE_COEFF, yLineOffset

Fields inherited from class AbstractRenderer

childRenderers, EPS, flushed, INF, isLastRendererForModelElement, modelElement, occupiedArea, OVERLAP_EPSILON, parent, positionedRenderers, properties

Constructor Summary

Constructors

Constructor	Description
FormFieldValueNonTrimmingTextRenderer(Text textElement)

Method Summary

Modifier and Type	Method	Description
protected TextRenderer	createCopy(GlyphLine gl, PdfFont font)	Creates a copy of this TextRenderer, which corresponds to the passed GlyphLine with PdfFont.
IRenderer	getNextRenderer()	Gets a new instance of this class to be used as a next renderer, after this renderer is used, if TextRenderer.layout(LayoutContext) is called more than once.
LayoutResult	layout(LayoutContext layoutContext)	This method simulates positioning of the renderer, including all of its children, and returns the LayoutResult, representing the layout result, including occupied area, status, i.e.
private void	setCallTrimFirst(boolean callTrimFirst)
void	trimFirst()	Trims any whitespace characters from the start of the GlyphLine to be rendered.

Methods inherited from class TextRenderer

applyOtf, baseCharactersCount, calculateAscenderDescender, calculateAscenderDescender, calculateLineWidth, charAt, createOverflowRenderer, createSplitRenderer, draw, drawSingleUnderline, getAscent, getBackgroundArea, getDescent, getFirstYLineRecursively, getLastYLineRecursively, getMinMaxWidth, getNumberOfSpaces, getTabAnchorCharacterPosition, getText, getYLine, length, lineLength, moveYLineTo, resolveFonts, setProcessedGlyphLineAndFont, setText, setText, split, toString

Methods inherited from class AbstractRenderer

addAllProperties, addChild, alignChildHorizontally, allowLastYLineRecursiveExtraction, applyAbsolutePosition, applyAction, applyBorderBox, applyBorderBox, applyDestination, applyDestinationsAndAnnotation, applyLinkAnnotation, applyMargins, applyMargins, applyPaddings, applyPaddings, applyRelativePositioningTranslation, beginElementOpacityApplying, beginTransformationIfApplied, calculateAbsolutePdfBBox, calculateBBox, calculateShiftToPositionBBoxOfPointsAt, clipBackgroundArea, clipBackgroundArea, clipBorderArea, createXObject, deleteOwnProperty, deleteProperty, drawBackground, drawBorder, drawChildren, endElementOpacityApplying, endTransformationIfApplied, getBorderAreaBBox, getBorderRadii, getBorders, getChildRenderers, getDefaultProperty, getInnerAreaBBox, getMargins, getMinMaxWidth, getModelElement, getOccupiedArea, getOccupiedAreaBBox, getOwnProperties, getOwnProperty, getPaddings, getParent, getProperty, getProperty, getPropertyAsBoolean, getPropertyAsColor, getPropertyAsFloat, getPropertyAsFloat, getPropertyAsFont, getPropertyAsInteger, getPropertyAsTransparentColor, getPropertyAsUnitValue, hasAbsoluteUnitValue, hasOwnOrModelProperty, hasOwnProperty, hasProperty, hasRelativeUnitValue, initElementAreas, isAbsolutePosition, isBorderBoxSizing, isFirstOnRootArea, isFixedLayout, isFlushed, isKeepTogether, isNotFittingHeight, isNotFittingLayoutArea, isNotFittingWidth, isOverflowFit, isOverflowProperty, isOverflowProperty, isOverflowProperty, isPositioned, isRelativePosition, isStaticLayout, move, rectangleToPointsList, retrieveHeight, retrieveMaxHeight, retrieveMaxWidth, retrieveMinHeight, retrieveMinWidth, retrieveResolvedDeclaredHeight, retrieveUnitValue, retrieveUnitValue, retrieveWidth, setBorders, setMinMaxWidthBasedOnFixedWidth, setParent, setProperty, transformPoints, updateHeight, updateHeightsOnSplit, updateMaxHeight, updateMinHeight, updateWidth

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface IPropertyContainer

deleteOwnProperty, getDefaultProperty, getOwnProperty, getProperty, hasOwnProperty, hasProperty, setProperty

Methods inherited from interface IRenderer

addChild, getChildRenderers, getModelElement, getOccupiedArea, getParent, getProperty, isFlushed, move, setParent

Field Details

callTrimFirst

private boolean callTrimFirst

Constructor Details

FormFieldValueNonTrimmingTextRenderer

public FormFieldValueNonTrimmingTextRenderer(Text textElement)

Method Details

getNextRenderer

public IRenderer getNextRenderer()

Description copied from class: TextRenderer

Gets a new instance of this class to be used as a next renderer, after this renderer is used, if TextRenderer.layout(LayoutContext) is called more than once.

If TextRenderer overflows to the next line, iText uses this method to create a renderer for the overflow part. So if one wants to extend TextRenderer, one should override this method: otherwise the default method will be used and thus the default rather than the custom renderer will be created. Another method that should be overridden in case of TextRenderer's extension is TextRenderer.createCopy(GlyphLine, PdfFont). This method is responsible for creation of TextRenderer's copies, which represent its parts of specific font.

Specified by:

getNextRenderer in interface IRenderer

Overrides:

getNextRenderer in class TextRenderer

Returns:

new renderer instance

layout

public LayoutResult layout(LayoutContext layoutContext)

Description copied from interface: IRenderer

This method simulates positioning of the renderer, including all of its children, and returns the LayoutResult, representing the layout result, including occupied area, status, i.e. if there was enough place to fit the renderer subtree, etc. LayoutResult can be extended to return custom layout results for custom elements, e.g. TextRenderer uses TextLayoutResult as its result. This method can be called standalone to learn how much area the renderer subtree needs, or can be called before IRenderer.draw(DrawContext), to prepare the renderer to be flushed to the output stream.

Specified by:

layout in interface IRenderer

Overrides:

layout in class TextRenderer

Parameters:

layoutContext - the description of layout area and any other additional information

Returns:

result of the layout process

trimFirst

public void trimFirst()

Description copied from class: TextRenderer

Trims any whitespace characters from the start of the GlyphLine to be rendered.

Overrides:

trimFirst in class TextRenderer

createCopy

protected TextRenderer createCopy(GlyphLine gl,
 PdfFont font)

Creates a copy of this TextRenderer, which corresponds to the passed GlyphLine with PdfFont.

While processing TextRenderer, iText uses this method to create glyph lines of specific fonts, which represent the TextRenderer's parts. If one extends TextRenderer, one should override this method, otherwise if FontSelector related logic is triggered, copies of this TextRenderer will have the default behavior rather than the custom one.

Overrides:

createCopy in class TextRenderer

Parameters:

gl - a GlyphLine which represents some of this TextRenderer's content

font - a PdfFont for this part of the TextRenderer's content

Returns:

copy of this TextRenderer, which correspond to the passed GlyphLine with PdfFont

setCallTrimFirst

private void setCallTrimFirst(boolean callTrimFirst)