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gecko-dev/editor/docs/midas-spec.html

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
<title>Midas Specification</title>
<meta name="author" content="Kathleen Brade">
<style type="text/css">
td { vertical-align: top; }
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<body>
Last revised:&nbsp; August 23, 2005<br>
<br>
This document describes the rich text editing controls for web pages
available in recent mozilla browsers.<br>
<br>
<h1> Enabling Rich Text Editing in your web page:</h1>
<div style="margin-left: 40px;">Given a document, you can add the
attribute "designMode" and set it to "on" to get an editable document.&nbsp;
For example, in JavaScript, if you have an iframe with an id of 'edit', you
can get its contentDocument and set designMode to "on" like this:<br>
<div style="margin-left: 40px;"><code>document.getElementById("edit").contentDocument.designMode="on";</code></div>
<br>
Right now, you can't completely turn off editing by setting designMode
to "off."&nbsp; Setting designMode to "off" will prevent certain operations
from being handled but typing and other actions are still possible.<br>
</div>
<br>
<h1>Invoking Commands:</h1>
<h2>execCommand</h2>
<div style="margin-left: 40px;">Given a document that has rich text
editing enabled (see above), you can invoke specific commands on the
document by calling execCommand with 3 parameters.&nbsp; For example,
in JavaScript, if you have an editable document,
you can invoke the bold command by calling this:<br>
<div style="margin-left: 40px;"><code>editableDocument.execCommand("Bold",
false, null);</code></div><br>
Notes:&nbsp; If you haven't set designMode to "On", you will get an
error.&nbsp; This could also happen if you call execCommand with the wrong
document.<br>
<br>
There are 3 required parameters for execCommand:<br>
<ol>
<li>command string</li>
<li>boolean flag for showing UI</li>
<li>value string</li>
</ol>
The first parameter is a string which contains the command.&nbsp; The
second parameter is a boolean flag. &nbsp;If it is set to true, you will
get an error (NS_ERROR_NOT_IMPLEMENTED). &nbsp;The third parameter is a
string which is the value.&nbsp; Some commands will require details such
as the particular size you want to set when setting a font size.<br>
<br>
The section on Supported Commands will document each command and any
corresponding values needed.<br>
</div>
<div style="margin-left: 40px;"> </div>
<br>
<h2>queryCommandEnabled</h2>
<blockquote>This command operates on the editable document.&nbsp; There
is one required parameter (the command string). &nbsp;The result is a
boolean which is true if the command is can be done given the current
selection and/or caret position. &nbsp;The result is false if the command
should not be invoked (execCommand) given the current selection and/or
caret position.<br>
</blockquote>
<br>
<h2>queryCommandState</h2>
<blockquote>This section needs to be written.&nbsp; It can be called
similarly to IE implementation.<br>
</blockquote>
<br>
<h2>queryCommandValue</h2>
<blockquote> This section needs to be written.&nbsp; It can be called
similarly to IE implementation.
</blockquote>
<br>
<h1>Supported Commands:</h1>
<div style="margin-left: 40px;">The following list of commands is
presented in alphabetical order. &nbsp;The commands may be mixed case
or whatever makes your code more readable.<br>
<br>
<table cellpadding="4" cellspacing="0" border="1"
style="text-align: left; width: 100%;">
<tbody>
<tr>
<td>command</td>
<td>value</td>
<td>explanation / behavior</td>
</tr>
<tr>
<td>backcolor</td>
<td>????</td>
<td>This command will set the background color of the document.</td>
</tr>
<tr>
<td>bold</td>
<td>none</td>
<td>If there is no selection, the insertion
point will set bold for subsequently typed characters.<br>
<br>
If there is a selection and all of the characters are already bold, the
bold will be removed. &nbsp;Otherwise, all selected characters will become
bold.</td>
</tr>
<tr>
<td>contentReadOnly</td>
<td>true<br>false</td>
<td>This command will make the editor readonly (true) or editable
(false).&nbsp; Anticipated usage is for temporarily disabling input while
something else is occurring elsewhere in the web page.</td>
</tr>
<tr>
<td>copy</td>
<td>none</td>
<td>If there is a selection, this command will copy the selection
to the clipboard.&nbsp; If there isn't a selection, nothing will happen.<br>
<br>
note: this command won't work without setting a pref or using signed
JS.&nbsp; See: http://www.mozilla.org/editor/midasdemo/securityprefs.html<br>
<br>
note:&nbsp; the shortcut key will automatically trigger this command
(typically accel-C) with or without the signed JS or any code on the page to
handle it.</td>
</tr>
<tr>
<td>createlink</td>
<td>url (href)</td>
<td>This command will not do anything if no selection
is made. &nbsp;If there is a selection, a link will be inserted around
the selection with the url parameter as the href of the link.</td>
</tr>
<tr>
<td>cut</td>
<td>none</td>
<td>If there is a selection, this command will copy the selection
to the clipboard and remove the selection from the edit control.&nbsp;
If there isn't a selection, nothing will happen.<br>
<br>
note: this command won't work without setting a pref or using signed
JS.&nbsp; See: http://www.mozilla.org/editor/midasdemo/securityprefs.html<br>
<br>
note: &nbsp;the shortcut key will automatically trigger this command
(typically accel-X) with or without the signed JS or any code on the page to
handle it.</td>
</tr>
<tr>
<td>decreasefontsize</td>
<td>none</td>
<td>This command will add a &lt;small&gt; tag around selection or
at insertion point.</td>
</tr>
<tr>
<td>delete</td>
<td>none</td>
<td>This command will delete all text and objects that
are selected.</td>
</tr>
<tr>
<td>fontname</td>
<td>????</td>
<td>This command will set the fontface for a selection
or at the insertion point if there is no selection.</td>
</tr>
<tr>
<td>fontsize</td>
<td>????</td>
<td>This command will set the fontsize for a selection
or at the insertion point if there is no selection.</td>
</tr>
<tr>
<td>forecolor</td>
<td>????</td>
<td>This command will set the text color of the
selection or at the insertion point.</td>
</tr>
<tr>
<td>formatblock</td>
<td>&lt;h1&gt;<br>
&lt;h2&gt;<br>
&lt;h3&gt;<br>
&lt;h4&gt;<br>
&lt;h5&gt;<br>
&lt;h6&gt;<br>
&lt;pre&gt;<br>
&lt;address&gt;<br>
&lt;p&gt;<br>
p<br>
[this list may not be complete]</td>
<td><br></td>
</tr>
<tr>
<td>heading</td>
<td>&lt;h1&gt;<br>
&lt;h2&gt;<br>
&lt;h3&gt;<br>
&lt;h4&gt;<br>
&lt;h5&gt;<br>
&lt;h6&gt;</td>
<td><br></td>
</tr>
<tr>
<td>hilitecolor</td>
<td>????</td>
<td>This command will set the hilite color of the selection or at
the insertion point.&nbsp; It only works with usecss enabled.</td>
</tr>
<tr>
<td>increasefontsize</td>
<td>none</td>
<td>This command will add a
&lt;big&gt; tag around selection or at insertion point.</td>
</tr>
<tr>
<td>indent</td>
<td>none</td>
<td>Indent the block where the caret is located.</td>
</tr>
<tr>
<td>inserthorizontalrule</td>
<td>none</td>
<td>This command will insert a horizontal rule
(line) at the insertion point.<br>
<br>
Does it delete the selection?</td>
</tr>
<tr>
<td>inserthtml</td>
<td>valid html string</td>
<td>This command will insert the given html into the &lt;body&gt;
in place of the current selection or at the caret location.</td>
</tr>
<tr>
<td>insertimage</td>
<td>url (src)</td>
<td>This command will insert an image (referenced by
url) at the insertion point.<br>
<br>
Does it delete the selection?</td>
</tr>
<tr>
<td>insertorderedlist</td>
<td>none</td>
<td><br></td>
</tr>
<tr>
<td>insertunorderedlist</td>
<td>none</td>
<td><br></td>
</tr>
<tr>
<td>insertparagraph</td>
<td>none</td>
<td><br></td>
</tr>
<tr>
<td>italic</td>
<td>none</td>
<td>If there is no selection, the insertion
point will set italic for subsequently typed characters. &nbsp;<br>
<br>
If there is a selection and all of the characters are already italic,
the italic will be removed. &nbsp;Otherwise, all selected characters will
become italic.</td>
</tr>
<tr>
<td>justifycenter</td>
<td>none</td>
<td><br></td>
</tr>
<tr>
<td>justifyfull</td>
<td>none</td>
<td><br></td>
</tr>
<tr>
<td>justifyleft</td>
<td>none</td>
<td><br></td>
</tr>
<tr>
<td>justifyright</td>
<td>none</td>
<td><br></td>
</tr>
<tr>
<td>outdent</td>
<td>none</td>
<td>Outdent the block where the caret is located.&nbsp; If the
block is not indented prior to calling outdent, nothing will happen.<br>
<br>
note: &nbsp;is an error thrown if no outdenting is done?</td>
</tr>
<tr>
<td>paste</td>
<td>none</td>
<td>This command will paste the contents of the clipboard at the
location of the caret.&nbsp; If there is a selection, it will be deleted
prior to the insertion of the clipboard's contents.<br>
<br>
note: this command won't work without setting a pref or using signed
JS.<br>
<tt>user_pref("capability.policy.policynames", "allowclipboard");</tt><tt>
user_pref("capability.policy.allowclipboard.Clipboard.paste",
"allAccess");</tt><br>
See: http://www.mozilla.org/editor/midasdemo/securityprefs.html<br>
<br>
note:&nbsp; the shortcut key will automatically trigger this command
(typically accel-V) with or without the signed JS or any code on the page to
handle it.</td>
</tr>
<tr>
<td>redo</td>
<td>none</td>
<td>This command will redo the previous undo action.&nbsp; If undo
was not the most recent action, this command will have no effect.<br>
<br>
note: &nbsp;the shortcut key will automatically trigger this command
(typically accel-shift-Z)</td>
</tr>
<tr>
<td>removeformat</td>
<td>none</td>
<td><br></td>
</tr>
<tr>
<td>selectall</td>
<td>none</td>
<td>This command will select all of the contents within the
editable area.<br>
<br>
note: &nbsp;the shortcut key will automatically trigger this command
(typically accel-A)</td>
</tr>
<tr>
<td>strikethrough</td>
<td>none</td>
<td>If there is no selection, the insertion point
will set strikethrough for subsequently typed characters.<br>
<br>
If there is a selection and all of the characters are already striked,
the strikethrough will be removed. Otherwise, all selected characters
will have a line drawn through them.</td>
</tr>
<tr>
<td>styleWithCSS</td>
<td>true<br>false</td>
<td>This command is used for
toggling the format of generated content.&nbsp; By default (at least
today), this is true.&nbsp; An example of the differences is that the
"bold" command will generate &lt;b&gt; if the styleWithCSS command is false
and generate css style attribute if the styleWithCSS command is true.</td>
</tr>
<tr>
<td>subscript</td>
<td>none</td>
<td>If there is no selection, the insertion point
will set subscript for subsequently typed characters. &nbsp;<br>
<br>
If there is a selection and all of the characters are already
subscripted, the subscript will be removed.&nbsp; Otherwise, all
selected characters will be drawn slightly lower than normal text.</td>
</tr>
<tr>
<td>superscript</td>
<td>none</td>
<td>If there is no selection, the insertion point
will set superscript for subsequently typed characters.<br>
<br>
If there is a selection and all of the characters are already
superscripted, the superscript will be removed.&nbsp; Otherwise, all
selected characters will be drawn slightly higher than normal text.</td>
</tr>
<tr>
<td>underline</td>
<td>none</td>
<td>If there is no selection, the insertion
point will set underline for subsequently typed characters.<br>
<br>
If there is a selection and all of the characters are already
underlined, the underline will be removed.&nbsp; Otherwise, all
selected characters will become underlined.</td>
</tr>
<tr>
<td>undo</td>
<td>none</td>
<td>This command will undo the previous action.&nbsp; If no action
has occurred in the document, then this command will have no effect.<br>
<br>
note: &nbsp;the shortcut key will automatically trigger this command
(typically accel-Z)</td>
</tr>
<tr>
<td>unlink</td>
<td>none</td>
<td><br></td>
</tr>
</tbody>
</table>
<br>
<table cellpadding="4" cellspacing="0" border="1"
style="text-align: left; width: 100%;">
<tbody>
<tr>
<td colspan="3">DEPRECATED COMMANDS</td>
</tr>
<tr>
<td>readonly</td>
<td>true<br>false</td>
<td>This command has been replaced with contentReadOnly.&nbsp; It
takes the same values as contentReadOnly, but the meaning of true and
false are inversed.</td>
</tr>
<tr>
<td>useCSS</td>
<td>truefalse</td>
<td>This command has been replaced with styleWithCSS.&nbsp; It takes
the same values as styleWithCSS, but the meaning of true and false are
inversed.</td>
</tr>
</tbody>
</table>
</div>
<br>
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</html>
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