Class RichTextArea

java.lang.Object
com.codename1.ui.Component
com.codename1.ui.Container
com.codename1.ui.AbstractEditorComponent
com.codename1.ui.RichTextArea
All Implemented Interfaces:
Animation, Editable, EditorHost, StyleListener, Iterable<Component>
public class RichTextArea extends AbstractEditorComponent

A native visual editor for rich text / HTML content (a WYSIWYG editor).

RichTextArea lets the user visually edit formatted text - bold, italic, lists, links, colors, headings and more - and exchange the result as HTML with your application. It works on phones and tablets (with the on screen virtual keyboard) as well as on desktops (with a physical keyboard).

On ports with low-level text input the editor uses the pure Codename One text engine (com.codename1.ui.editor), which renders the document itself and binds to the soft keyboard, hardware keyboard and IME. Ports without that contract use an editable BrowserComponent fallback. A platform port may transparently replace either with a fully native editing widget; see com.codename1.impl.CodenameOneImplementation#createNativeEditorPeer(Object, String).

Basic usage
Form hi = new Form("Rich Text", new BorderLayout());
RichTextArea editor = new RichTextArea();
editor.setHtml("<p>Hello <b>world</b></p>");

Toolbar tb = hi.getToolbar();
tb.addCommandToRightBar("B", null, e -> editor.bold());
tb.addCommandToRightBar("I", null, e -> editor.italic());

hi.add(BorderLayout.CENTER, editor);
hi.show();

// later, read the edited content back:
editor.getHtml(html -> Log.p("User wrote: " + html));

  • Constructor Details

    • RichTextArea

      public RichTextArea()
      Creates an empty rich text editor.

    • RichTextArea

      public RichTextArea(String html)

      Creates a rich text editor initialized with the supplied HTML.

      Parameters
      • html: the initial HTML content

  • Method Details

    • setHtml

      public void setHtml(String html)

      Replaces the entire editor content with the supplied HTML.

      Parameters
      • html: the HTML to display and edit

    • setContent

      public void setContent(String content, RichTextFormat format)
      Replaces the editor content from any supported rich-text interchange format.

    • setRtf

      public void setRtf(String rtf)
      Replaces the editor content with RTF.

    • setMarkdown

      public void setMarkdown(String markdown)
      Replaces the editor content with Markdown.

    • setAsciiDoc

      public void setAsciiDoc(String asciidoc)
      Replaces the editor content with AsciiDoc.

    • getHtml

      public void getHtml(SuccessCallback<String> callback)

      Retrieves the current editor content as an HTML string. The callback is invoked on the EDT.

      Parameters
      • callback: receives the HTML content

    • getText

      public void getText(SuccessCallback<String> callback)

      Retrieves the current editor content as plain text (markup stripped). The callback is invoked on the EDT.

      Parameters
      • callback: receives the plain text content

    • insertHtml

      public void insertHtml(String html)

      Inserts the supplied HTML fragment at the current cursor position.

      Parameters
      • html: the HTML fragment to insert

    • insertContent

      public void insertContent(String content, RichTextFormat format)
      Inserts content in any supported rich-text interchange format at the current selection.

    • insertRtf

      public void insertRtf(String rtf)
      Inserts RTF at the current selection.

    • insertMarkdown

      public void insertMarkdown(String markdown)
      Inserts Markdown at the current selection.

    • insertAsciiDoc

      public void insertAsciiDoc(String asciidoc)
      Inserts AsciiDoc at the current selection.

    • insertImage

      public void insertImage(String url)

      Inserts an image at the current cursor position.

      Parameters
      • url: the image URL (may be an http(s) URL or a data: URI)

    • setPlaceholder

      public void setPlaceholder(String text)

      Sets the placeholder text shown when the editor is empty.

      Parameters
      • text: the placeholder hint

    • getPlaceholder

      public String getPlaceholder()
      Returns the current placeholder text.

    • bold

      public void bold()
      Toggles bold styling on the current selection.

    • italic

      public void italic()
      Toggles italic styling on the current selection.

    • underline

      public void underline()
      Toggles underline styling on the current selection.

    • strikeThrough

      public void strikeThrough()
      Toggles strike-through styling on the current selection.

    • insertOrderedList

      public void insertOrderedList()
      Converts the current block(s) into an ordered (numbered) list.

    • insertUnorderedList

      public void insertUnorderedList()
      Converts the current block(s) into an unordered (bulleted) list.

    • indent

      public void indent()
      Increases the indentation of the current block.

    • outdent

      public void outdent()
      Decreases the indentation of the current block.

    • justifyLeft

      public void justifyLeft()
      Left aligns the current block.

    • justifyCenter

      public void justifyCenter()
      Center aligns the current block.

    • justifyRight

      public void justifyRight()
      Right aligns the current block.

    • createLink

      public void createLink(String url)

      Wraps the current selection in a hyperlink.

      Parameters
      • url: the link target

    • removeLink

      public void removeLink()
      Removes the hyperlink covering the current selection.

    • setForegroundColor

      public void setForegroundColor(int rgb)

      Sets the foreground (text) color of the current selection.

      Parameters
      • rgb: the color as a 0xRRGGBB integer

    • setHighlightColor

      public void setHighlightColor(int rgb)

      Sets the highlight (background) color of the current selection.

      Parameters
      • rgb: the color as a 0xRRGGBB integer

    • setBlockFormat

      public void setBlockFormat(String tag)

      Applies a block format / heading to the current block. Common values are "p", "h1" .. "h6", "pre" and "blockquote".

      Parameters
      • tag: the block tag name

    • setFontSize

      public void setFontSize(int size)

      Applies a relative font size (1 through 7, matching the legacy HTML font size scale) to the current selection.

      Parameters
      • size: a value between 1 and 7

    • removeFormat

      public void removeFormat()
      Removes all inline formatting from the current selection.

    • undo

      public void undo()
      Undoes the last editing operation.

    • redo

      public void redo()
      Redoes the last undone editing operation.

    • queryCommandState

      public void queryCommandState(String command, SuccessCallback<Boolean> callback)

      Queries whether a given inline command (e.g. "bold", "italic", "underline") is currently active for the selection, which is useful to keep a formatting toolbar in sync. The callback is invoked on the EDT.

      Parameters

      • command: the command name to test

      • callback: receives true if the command is active for the current selection