W3cubDocs

Class MinimalHTMLWriter

java.lang.Object

javax.swing.text.AbstractWriter

javax.swing.text.html.MinimalHTMLWriter

public class MinimalHTMLWriter extends AbstractWriter

MinimalHTMLWriter is a fallback writer used by the HTMLEditorKit to write out HTML for a document that is a not produced by the EditorKit. The format for the document is:

 <html>
   <head>
     <style>
        <!-- list of named styles
         p.normal {
            font-family: SansSerif;
            margin-height: 0;
            font-size: 14
         }
        -->
      </style>
   </head>
   <body>
    <p style=normal>
        Bold, italic, and underline attributes
        of the run are emitted as HTML tags.
        The remaining attributes are emitted as
        part of the style attribute of a <span> tag.
        The syntax is similar to inline styles.
    </p>
   </body>
 </html>

Field Summary

Fields declared in class javax.swing.text.AbstractWriter

NEWLINE

Constructor Summary

Constructor	Description
`MinimalHTMLWriter(Writer w, StyledDocument doc)`	Creates a new MinimalHTMLWriter.
`MinimalHTMLWriter(Writer w, StyledDocument doc, int pos, int len)`	Creates a new MinimalHTMLWriter.

Method Summary

Modifier and Type	Method	Description
`protected void`	`endFontTag()`	This is no longer used, instead <span> will be written out.
`protected boolean`	`inFontTag()`	Returns true if we are currently in a <font> tag.
`protected boolean`	`isText(Element elem)`	Returns true if the element is a text element.
`protected void`	`startFontTag(String style)`	This is no longer used, instead <span> will be written out.
`protected void`	`text(Element elem)`	Writes out text.
`void`	`write()`	Generates HTML output from a StyledDocument.
`protected void`	`writeAttributes(AttributeSet attr)`	Writes out all the attributes for the following types: StyleConstants.ParagraphConstants, StyleConstants.CharacterConstants, StyleConstants.FontConstants, StyleConstants.ColorConstants.
`protected void`	`writeBody()`	Iterates over the elements in the document and processes elements based on whether they are branch elements or leaf elements.
`protected void`	`writeComponent(Element elem)`	Responsible for handling Component Elements; deliberately unimplemented.
`protected void`	`writeContent(Element elem, boolean needsIndenting)`	Writes out the attribute set in an HTML-compliant manner.
`protected void`	`writeEndParagraph()`	Emits an end tag for a <p> tag.
`protected void`	`writeEndTag(String endTag)`	Writes out an end tag appropriately indented.
`protected void`	`writeHeader()`	Writes out the <head> and <style> tags, and then invokes writeStyles() to write out all the named styles as the content of the <style> tag.
`protected void`	`writeHTMLTags(AttributeSet attr)`	Generates bold <b>, italic <i>, and <u> tags for the text based on its attribute settings.
`protected void`	`writeImage(Element elem)`	Responsible for handling Icon Elements; deliberately unimplemented.
`protected void`	`writeLeaf(Element elem)`	Responsible for writing out other non-text leaf elements.
`protected void`	`writeNonHTMLAttributes(AttributeSet attr)`	Writes out the remaining character-level attributes (attributes other than bold, italic, and underline) in an HTML-compliant way.
`protected void`	`writeStartParagraph(Element elem)`	Emits the start tag for a paragraph.
`protected void`	`writeStartTag(String tag)`	Writes out a start tag appropriately indented.
`protected void`	`writeStyles()`	Writes out all the named styles as the content of the <style> tag.

Methods declared in class javax.swing.text.AbstractWriter

decrIndent, getCanWrapLines, getCurrentLineLength, getDocument, getElementIterator, getEndOffset, getIndentLevel, getIndentSpace, getLineLength, getLineSeparator, getStartOffset, getText, getWriter, incrIndent, indent, inRange, isLineEmpty, output, setCanWrapLines, setCurrentLineLength, setIndentSpace, setLineLength, setLineSeparator, write, write, write, writeLineSeparator

Methods declared in class java.lang.Object

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

Constructor Details

MinimalHTMLWriter

public MinimalHTMLWriter(Writer w, StyledDocument doc)

Creates a new MinimalHTMLWriter.

Parameters:: w - Writer; doc - StyledDocument

MinimalHTMLWriter

public MinimalHTMLWriter(Writer w, StyledDocument doc, int pos, int len)

Creates a new MinimalHTMLWriter.

Parameters:: w - Writer; doc - StyledDocument; pos - The location in the document to fetch the content.; len - The amount to write out.

Method Details

write

public void write() throws IOException, BadLocationException

Generates HTML output from a StyledDocument.

Specified by:: write in class AbstractWriter
Throws:: IOException - on any I/O error; BadLocationException - if pos represents an invalid location within the document.

writeAttributes

protected void writeAttributes(AttributeSet attr) throws IOException

Writes out all the attributes for the following types: StyleConstants.ParagraphConstants, StyleConstants.CharacterConstants, StyleConstants.FontConstants, StyleConstants.ColorConstants. The attribute name and value are separated by a colon. Each pair is separated by a semicolon.

Overrides:: writeAttributes in class AbstractWriter
Parameters:: attr - an AttributeSet.
Throws:: IOException - on any I/O error

text

protected void text(Element elem) throws IOException, BadLocationException

Writes out text.

Overrides:: text in class AbstractWriter
Parameters:: elem - an Element.
Throws:: IOException - on any I/O error; BadLocationException - if pos represents an invalid location within the document.

writeStartTag

protected void writeStartTag(String tag) throws IOException

Writes out a start tag appropriately indented. Also increments the indent level.

Parameters:: tag - a start tag
Throws:: IOException - on any I/O error

writeEndTag

protected void writeEndTag(String endTag) throws IOException

Writes out an end tag appropriately indented. Also decrements the indent level.

Parameters:: endTag - an end tag
Throws:: IOException - on any I/O error

writeHeader

protected void writeHeader() throws IOException

Writes out the <head> and <style> tags, and then invokes writeStyles() to write out all the named styles as the content of the <style> tag. The content is surrounded by valid HTML comment markers to ensure that the document is viewable in applications/browsers that do not support the tag.

Throws:: IOException - on any I/O error

writeStyles

protected void writeStyles() throws IOException

Writes out all the named styles as the content of the <style> tag.

Throws:: IOException - on any I/O error

writeBody

protected void writeBody() throws IOException, BadLocationException

Iterates over the elements in the document and processes elements based on whether they are branch elements or leaf elements. This method specially handles leaf elements that are text.

Throws:: IOException - on any I/O error; BadLocationException - if we are in an invalid location within the document.

writeEndParagraph

protected void writeEndParagraph() throws IOException

Emits an end tag for a <p> tag. Before writing out the tag, this method ensures that all other tags that have been opened are appropriately closed off.

Throws:: IOException - on any I/O error

writeStartParagraph

protected void writeStartParagraph(Element elem) throws IOException

Emits the start tag for a paragraph. If the paragraph has a named style associated with it, then this method also generates a class attribute for the <p> tag and sets its value to be the name of the style.

Parameters:: elem - an element
Throws:: IOException - on any I/O error

writeLeaf

protected void writeLeaf(Element elem) throws IOException

Responsible for writing out other non-text leaf elements.

Parameters:: elem - an element
Throws:: IOException - on any I/O error

writeImage

protected void writeImage(Element elem) throws IOException

Responsible for handling Icon Elements; deliberately unimplemented. How to implement this method is an issue of policy. For example, if you're generating an <img> tag, how should you represent the src attribute (the location of the image)? In certain cases it could be a URL, in others it could be read from a stream.

Parameters:: elem - an element of type StyleConstants.IconElementName
Throws:: IOException - if I/O error occurred.

writeComponent

protected void writeComponent(Element elem) throws IOException

Responsible for handling Component Elements; deliberately unimplemented. How this method is implemented is a matter of policy.

Parameters:: elem - an element of type StyleConstants.ComponentElementName
Throws:: IOException - if I/O error occurred.

isText

protected boolean isText(Element elem)

Returns true if the element is a text element.

Parameters:: elem - an element
Returns:: true if the element is a text element.

writeContent

protected void writeContent(Element elem, boolean needsIndenting) throws IOException, BadLocationException

Writes out the attribute set in an HTML-compliant manner.

Parameters:: elem - an element; needsIndenting - indentation will be added if needsIndenting is true
Throws:: IOException - on any I/O error; BadLocationException - if pos represents an invalid location within the document.

writeHTMLTags

protected void writeHTMLTags(AttributeSet attr) throws IOException

Generates bold <b>, italic <i>, and <u> tags for the text based on its attribute settings.

Parameters:: attr - a set of attributes
Throws:: IOException - on any I/O error

writeNonHTMLAttributes

protected void writeNonHTMLAttributes(AttributeSet attr) throws IOException

Writes out the remaining character-level attributes (attributes other than bold, italic, and underline) in an HTML-compliant way. Given that attributes such as font family and font size have no direct mapping to HTML tags, a <span> tag is generated and its style attribute is set to contain the list of remaining attributes just like inline styles.

Parameters:: attr - a set of attributes
Throws:: IOException - on any I/O error

inFontTag

protected boolean inFontTag()

Returns true if we are currently in a <font> tag.

Returns:: true if we are currently in a <font> tag.

endFontTag

protected void endFontTag() throws IOException

This is no longer used, instead <span> will be written out.

Writes out an end tag for the <font> tag.

Throws:: IOException - on any I/O error

startFontTag

protected void startFontTag(String style) throws IOException

This is no longer used, instead <span> will be written out.

Writes out a start tag for the <font> tag. Because font tags cannot be nested, this method closes out any enclosing font tag before writing out a new start tag.

Parameters:: style - a font style
Throws:: IOException - on any I/O error

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Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/text/html/MinimalHTMLWriter.html