Class HTMLDocument

public static final String AdditionalComments

Document property key value. The value for the key will be a Vector of Strings that are comments not found in the body.

Field Value:

"AdditionalComments"

public HTMLDocument()

Constructs an HTML document using the default buffer size and a default StyleSheet. This is a convenience method for the constructor HTMLDocument(Content, StyleSheet).

public HTMLDocument(AbstractDocument.Content c,
                    StyleSheet styles)

Constructs an HTML document with the given content storage implementation and the given style/attribute storage mechanism.

Parameters:

c - the container for the content

styles - the styles

public HTMLDocument(StyleSheet styles)

Constructs an HTML document with the default content storage implementation and the specified style/attribute storage mechanism. This is a convenience method for the constructor HTMLDocument(Content, StyleSheet).

Parameters:

styles - the styles

protected void create(DefaultStyledDocument.ElementSpec[] data)

Replaces the contents of the document with the given element specifications. This is called before insert if the loading is done in bursts. This is the only method called if loading the document entirely in one burst.

Overrides:

create in interface DefaultStyledDocument

Parameters:

data - the new contents of the document

protected Element createBranchElement(Element parent,
                                      AttributeSet a)

Creates a document branch element, that can contain other elements. This is implemented to return an element of type HTMLDocument.BlockElement.

Overrides:

createBranchElement in interface AbstractDocument

Parameters:

parent - the parent element

a - the attributes

Returns:

the element

protected AbstractDocument.AbstractElement createDefaultRoot()

Creates the root element to be used to represent the default document structure.

Overrides:

createDefaultRoot in interface DefaultStyledDocument

Returns:

the element base

protected Element createLeafElement(Element parent,
                                    AttributeSet a,
                                    int p0,
                                    int p1)

Creates a document leaf element that directly represents text (doesn't have any children). This is implemented to return an element of type HTMLDocument.RunElement.

Overrides:

createLeafElement in interface AbstractDocument

Parameters:

parent - the parent element

a - the attributes for the element

p0 - the beginning of the range (must be at least 0)

p1 - the end of the range (must be at least p0)

Returns:

the new element

protected void fireChangedUpdate(DocumentEvent e)

Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.

Overrides:

fireChangedUpdate in interface AbstractDocument

Parameters:

e - the event

See Also:

EventListenerList

protected void fireUndoableEditUpdate(UndoableEditEvent e)

Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.

Overrides:

fireUndoableEditUpdate in interface AbstractDocument

Parameters:

e - the event

See Also:

EventListenerList

public URL getBase()

Returns the location to resolve relative URLs against. By default this will be the document's URL if the document was loaded from a URL. If a base tag is found and can be parsed, it will be used as the base location.

Returns:

the base location

public Element getElement(String id)

Returns the element that has the given id Attribute. If the element can't be found, null is returned. Note that this method works on an Attribute, not a character tag. In the following HTML snippet: <a id="HelloThere"> the attribute is 'id' and the character tag is 'a'. This is a convenience method for getElement(RootElement, HTML.Attribute.id, id). This is not thread-safe.

Parameters:

id - the string representing the desired Attribute

Returns:

the element with the specified Attribute or null if it can't be found, or null if id is null

Since:

1.3

See Also:

HTML.Attribute

public Element getElement(Element e,
                          Object attribute,
                          Object value)

Returns the child element of e that contains the attribute, attribute with value value, or null if one isn't found. This is not thread-safe.

Parameters:

e - the root element where the search begins

attribute - the desired Attribute

value - the values for the specified Attribute

Returns:

the element with the specified Attribute and the specified value, or null if it can't be found

Since:

1.3

See Also:

HTML.Attribute

public Iterator<E> getIterator(HTML.Tag t)

Fetches an iterator for the specified HTML tag. This can be used for things like iterating over the set of anchors contained, or iterating over the input elements.

Parameters:

t - the requested HTML.Tag

Returns:

the Iterator for the given HTML tag

See Also:

HTML.Tag

public HTMLEditorKit.Parser getParser()

Returns the parser that is used when inserting HTML into the existing document.

Returns:

the parser used for text insertion

Since:

1.3

public boolean getPreservesUnknownTags()

Returns the behavior the parser observes when encountering unknown tags.

Returns:

true if unknown tags are to be preserved when parsing

See Also:

HTML.Tag

public HTMLEditorKit.ParserCallback getReader(int pos)

Fetches the reader for the parser to use when loading the document with HTML. This is implemented to return an instance of HTMLDocument.HTMLReader. Subclasses can reimplement this method to change how the document gets structured if desired. (For example, to handle custom tags, or structurally represent character style elements.)

Parameters:

pos - the starting position

Returns:

the reader used by the parser to load the document

public HTMLEditorKit.ParserCallback getReader(int pos,
                                              int popDepth,
                                              int pushDepth,
                                              HTML.Tag insertTag)

Returns the reader for the parser to use to load the document with HTML. This is implemented to return an instance of HTMLDocument.HTMLReader. Subclasses can reimplement this method to change how the document gets structured if desired. (For example, to handle custom tags, or structurally represent character style elements.)

This is a convenience method for getReader(int, int, int, HTML.Tag, TRUE).

Parameters:

popDepth - the number of ElementSpec.EndTagTypes to generate before inserting

pushDepth - the number of ElementSpec.StartTagTypes with a direction of ElementSpec.JoinNextDirection that should be generated before inserting, but after the end tags have been generated

insertTag - the first tag to start inserting into document

Returns:

the reader used by the parser to load the document

public StyleSheet getStyleSheet()

Fetches the StyleSheet with the document-specific display rules (CSS) that were specified in the HTML document itself.

Returns:

the StyleSheet

public int getTokenThreshold()

Gets the number of tokens to buffer before trying to update the documents element structure. The default value is Integer.MAX_VALUE.

Returns:

the number of tokens to buffer

protected void insert(int offset,
                      DefaultStyledDocument.ElementSpec[] data)
            throws BadLocationException

Inserts new elements in bulk. This is how elements get created in the document. The parsing determines what structure is needed and creates the specification as a set of tokens that describe the edit while leaving the document free of a write-lock. This method can then be called in bursts by the reader to acquire a write-lock for a shorter duration (i.e. while the document is actually being altered).

Overrides:

insert in interface DefaultStyledDocument

Parameters:

offset - the starting offset

data - the element data

Throws:

BadLocationException - if the given position does not represent a valid location in the associated document.

public void insertAfterEnd(Element elem,
                           String htmlText)
            throws BadLocationException,
                   IOException

Inserts the HTML specified as a string after the the end of the given element.

For this to work correcty, the document must have an HTMLEditorKit.Parser set. This will be the case if the document was created from an HTMLEditorKit via the createDefaultDocument method.

Parameters:

elem - the element to be the root for the new text

htmlText - the string to be parsed and assigned to elem

Throws:

IllegalStateException - if an HTMLEditorKit.Parser has not been set on the document

Since:

1.3

public void insertAfterStart(Element elem,
                             String htmlText)
            throws BadLocationException,
                   IOException

Inserts the HTML specified as a string at the start of the element.

For this to work correcty, the document must have an HTMLEditorKit.Parser set. This will be the case if the document was created from an HTMLEditorKit via the createDefaultDocument method.

Parameters:

elem - the branch element to be the root for the new text

htmlText - the string to be parsed and assigned to elem

Throws:

IllegalStateException - if an HTMLEditorKit.Parser has not been set on the document

Since:

1.3

public void insertBeforeEnd(Element elem,
                            String htmlText)
            throws BadLocationException,
                   IOException

Inserts the HTML specified as a string at the end of the element.

If elem's children are leaves, and the character at a elem.getEndOffset() - 1 is a newline, this will insert before the newline so that there isn't text after the newline.

For this to work correcty, the document must have an HTMLEditorKit.Parser set. This will be the case if the document was created from an HTMLEditorKit via the createDefaultDocument method.

Parameters:

elem - the element to be the root for the new text

htmlText - the string to be parsed and assigned to elem

Throws:

IllegalStateException - if an HTMLEditorKit.Parser has not been set on the document

Since:

1.3

public void insertBeforeStart(Element elem,
                              String htmlText)
            throws BadLocationException,
                   IOException

Inserts the HTML specified as a string before the start of the given element.

For this to work correcty, the document must have an HTMLEditorKit.Parser set. This will be the case if the document was created from an HTMLEditorKit via the createDefaultDocument method.

Parameters:

elem - the element to be the root for the new text

htmlText - the string to be parsed and assigned to elem

Throws:

IllegalStateException - if an HTMLEditorKit.Parser has not been set on the document

Since:

1.3

protected void insertUpdate(AbstractDocument.DefaultDocumentEvent chng,
                            AttributeSet attr)

Updates document structure as a result of text insertion. This will happen within a write lock. This implementation simply parses the inserted content for line breaks and builds up a set of instructions for the element buffer.

Overrides:

insertUpdate in interface DefaultStyledDocument

Parameters:

chng - a description of the document change

attr - the attributes

public void processHTMLFrameHyperlinkEvent(HTMLFrameHyperlinkEvent e)

Processes HyperlinkEvents that are generated by documents in an HTML frame. The HyperlinkEvent type, as the parameter suggests, is HTMLFrameHyperlinkEvent. In addition to the typical information contained in a HyperlinkEvent, this event contains the element that corresponds to the frame in which the click happened (the source element) and the target name. The target name has 4 possible values:

• _self
• _parent
• _top
• a named frame

If target is _self, the action is to change the value of the HTML.Attribute.SRC attribute and fires a ChangedUpdate event.

If the target is _parent, then it deletes the parent element, which is a <FRAMESET> element, and inserts a new <FRAME> element, and sets its HTML.Attribute.SRC attribute to have a value equal to the destination URL and fire a RemovedUpdate and InsertUpdate.

If the target is _top, this method does nothing. In the implementation of the view for a frame, namely the FrameView, the processing of _top is handled. Given that _top implies replacing the entire document, it made sense to handle this outside of the document that it will replace.

If the target is a named frame, then the element hierarchy is searched for an element with a name equal to the target, its HTML.Attribute.SRC attribute is updated and a ChangedUpdate event is fired.

Parameters:

e - the event

public void setBase(URL u)

Sets the location to resolve relative URLs against. By default this will be the document's URL if the document was loaded from a URL. If a base tag is found and can be parsed, it will be used as the base location.

This also sets the base of the StyleSheet to be u as well as the base of the document.

Parameters:

u - the desired base URL

public void setInnerHTML(Element elem,
                         String htmlText)
            throws BadLocationException,
                   IOException

Replaces the children of the given element with the contents specified as an HTML string.

This will be seen as at least two events, n inserts followed by a remove.

For this to work correcty, the document must have an HTMLEditorKit.Parser set. This will be the case if the document was created from an HTMLEditorKit via the createDefaultDocument method.

Parameters:

elem - the branch element whose children will be replaced

htmlText - the string to be parsed and assigned to elem

Throws:

IllegalArgumentException - if elem is a leaf

IllegalStateException - if an HTMLEditorKit.Parser has not been defined

Since:

1.3

public void setOuterHTML(Element elem,
                         String htmlText)
            throws BadLocationException,
                   IOException

Replaces the given element in the parent with the contents specified as an HTML string.

This will be seen as at least two events, n inserts followed by a remove.

When replacing a leaf this will attempt to make sure there is a newline present if one is needed. This may result in an additional element being inserted. Consider, if you were to replace a character element that contained a newline with <img> this would create two elements, one for the image, ane one for the newline.

If you try to replace the element at length you will most likely end up with two elements, eg setOuterHTML(getCharacterElement (getLength()), "blah") will result in two leaf elements at the end, one representing 'blah', and the other representing the end element.

For this to work correcty, the document must have an HTMLEditorKit.Parser set. This will be the case if the document was created from an HTMLEditorKit via the createDefaultDocument method.

Parameters:

elem - the branch element whose children will be replaced

htmlText - the string to be parsed and assigned to elem

Throws:

IllegalStateException - if an HTMLEditorKit.Parser has not been set

Since:

1.3

public void setParagraphAttributes(int offset,
                                   int length,
                                   AttributeSet s,
                                   boolean replace)

Sets attributes for a paragraph.

This method is thread safe, although most Swing methods are not. Please see Threads and Swing for more information.

Specified by:

setParagraphAttributes in interface StyledDocument

Overrides:

setParagraphAttributes in interface DefaultStyledDocument

Parameters:

offset - the offset into the paragraph (must be at least 0)

length - the number of characters affected (must be at least 0)

s - the attributes

replace - whether to replace existing attributes, or merge them

public void setParser(HTMLEditorKit.Parser parser)

Sets the parser that is used by the methods that insert html into the existing document, such as setInnerHTML, and setOuterHTML.

HTMLEditorKit.createDefaultDocument will set the parser for you. If you create an HTMLDocument by hand, be sure and set the parser accordingly.

Parameters:

parser - the parser to be used for text insertion

Since:

1.3

public void setPreservesUnknownTags(boolean preservesTags)

Determines how unknown tags are handled by the parser. If set to true, unknown tags are put in the model, otherwise they are dropped.

Parameters:

preservesTags - true if unknown tags should be saved in the model, otherwise tags are dropped

See Also:

HTML.Tag

public void setTokenThreshold(int n)

Sets the number of tokens to buffer before trying to update the documents element structure.

Parameters:

n - the number of tokens to buffer