Replace VisualEditor.i18n.php with a shim that uses the
LocalisationCacheRecache hook to read messages from JSON files
and add cache dependencies.
Change-Id: Ib8490d3e327ddf5852827c24ee2aa2916c8af072
* Add lib/ve.
* Remove modules provided by VisualEditor core.
* Update paths.
* Remove VisualEditor core specific things from Gruntfile.
* Remove entries from external.js already in lib/ve/.docs/external.js.
* Implement build script to compose a jsduck index that includes
all of VisualEditor core. Right now it includes VisualEditor's
index as-is, and because those patterns (e.g. ve.dm.*Node) will
also MW subclasses this means our category page will include
MW classes under "VisualEditor (core)" (before the repo split,
this was intentional).
This is inevitable unless we list every class individually, or
(the plan) until we move the MW subclasses out of the ve.*
namespace and into mw.* somewhere.
Bug: 45342
Change-Id: Iff45cd555430634c9fc341fd3b177c1e0625300b
ext.visualEditor.base doesn't and shouldn't depend on mw.util,
but some other modules do. viewPageTarget.init has a dependency
on mw.util meaning that if VE is loaded through it, we'll always
be fine, but for correctness (and support for other targets),
explicitly indicate the dependency on mw.util for every module that
uses it.
Change-Id: I63821938d899897088799bde4d46b04cd2f9a3e2
I intially thought it was associated with the language inspector, but
it's not, it's the label for the languages pane in the meta dialog.
Change-Id: I478e3951862a25eee056e3df6cc3c9f9f7d9d935
* Split files according to ve / ve-mw paths
* Split messages according to msgs-ve / msgs-ve-mw
* Update dependencies accordingly
* Remove ve-mw/ hack in makeStaticLoader.php, no longer needed
Bug: 45342
Change-Id: I6cb89606c307e27e237a1e9b56b94dfdcd310f41
VisualEditor.php:
* Make jquery.i18n a dependency of ext.visualEditor.standalone
makeStaticLoader.php:
* Remove ve.init.platform.addMessages() call with PHP-generated messages
* Add fake module for jquery.i18n
** Needed because the module might come from MW core
** Also add special treatment for fallbacks.js and language scripts
ve.init.sa.Platform.js:
* Remove basic message system, replace with jquery.i18n
* Add initialize method that loads messages for current language and
fallbacks
ve.init.sa.Target.js:
* Wait for the platform to initialize before actually doing things
* Add .setup() method to allow callers to short-circuit this process
** This is convenient for callers of ve.init.sa.Target in the test suite
ve.ce.test.js:
* Use existing ve.test.utils function for creating a surface
ve.test.utils.js:
* Call .setup() on the target so we can get a surface synchronously
ve.init.Platform.test.js:
* Make these tests async, wait for the platform to initialize
* Allow for missing messages to be output either as <foo> (MW)
or foo (jquery.i18n)
* Get rid of message clearing code, namespace test messages instead
Change-Id: Iac7dfd327eadf9b503a61510574d35d748faac92
* Don't add ext.visualEditor.base to it, and strip of ve-mw stuff
** .base doesn't contain ve-mw stuff any more, so no stripping needed
** Instead of appending .base, just load .base and create a
separate fake module for Standalone init.
* Don't manually register .sa files
** Instead use ext.visualEditor.standalone, it's right there.
** Add missing CSS file to .standalone.
* Documented the purpose of 'Dependencies' and removed scripts
from that fake module that don't fall under that rationale and
instead add them as regular modules (rangy, unicodejs).
* Removed weird 'jquery' dependency in 'ext.visualEditor.core'
module. This is strongly recommended against, and might
actually cause jQuery to be reloaded due to outstanding bugs
in core with the state machine in the startup queue (jquery, mediawiki).
* Unlist unused 'jquery.client' dependency in makeStaticLoader.
As per the module definitions in VisualEditor.php, this is
only used by the .mediawiki module. Grepped modules/ve/ and
found 0 uses.
* Update dependency order to roughly match the dependency tree
as it is specified in ResourceLoader (e.g. rangy is for .core,
not .base).
* Keep fake modules out of ResourceLoader.
Change-Id: I2a31543e5ad2fc39f5980fea855172108eda4428
Move all text styles, and the remove styles button, into a new 'list' toolbar
group, using the text-styles icon. Less-used text styles (strikethrough, code
and underline) are demoted, with remove styles at the end, and bold and italic
promoted.
Now re-label the "More" catch-all to now be "Insert", which is what's left.
Change-Id: I66a1bba347ea64e540106b1090995b3117a8b1b2
Bonus: give both the language name and page name
lang and dir attributes.
Further bonus: reintroduce message that was deleted
earlier with all of its original translations.
Change-Id: Id137ff9a069799b6c09574b72f450eac6665d144
A tool to add special characters and diacritics to text.
Also added a new button type ve.ui.GroupButtonWidget that includes a
group of PushButtonWidget objects and returna the individual button's
value upon click
Wikis can edit <visualeditor-specialcharinspector-characterlist-insert>,
a JSON string, to include their own desird special characters to insert
through the tool.
Bug: 50296
Change-Id: I26d1f437feef1c8b61ed3be5f74ef524b33baf49
Use OOJS-UI's newly-extended paged dialogs (in e08eb2a03b) to refactor
how the Transclusion and Meta dialogs work, splitting out the code for
each of the panels into its own file and simplifying extensibility.
The Meta dialog (ve.ui.MWMetaDialog) now has two self-managing panels:
* ve.ui.MWCategoriesPage for categories and the default sort key
* ve.ui.MWLanguagesPage for language links
The Transclusion dialog (ve.ui.MWTransclusionDialog) now has four:
* ve.ui.MWTemplatePage for a template's primary panel
* ve.ui.MWTemplateParameterPage for each parameter of a template
* ve.ui.MWTemplatePlaceholderPage for a placeholder to insert a template
* ve.ui.MWTransclusionContentPage for non-template transclusion
Additionally, the Transclusion dialog has been slightly cleaned up:
* Replace add/remove events with replace events in transclusion model
* Actually return and resolve a promise (as documented)
* Get rid of "origin" info in template models
* Add method for adding required parts
TODO:
* Decide how and when we will choose between advanced transclusion and
template dialogs
* Work out design issues with how template descriptions will be visible
and how adding parameters will work if only showing parameters in
outline
* Add preview to template dialog
* Consider ways to further improve pages for use in continuous mode
WARNING:
* Right now the template dialog gets overridden by the advanced
transclusion dialog because they have the same symbolic name and the
latter is registered later than the former. To test the template
dialog, just change the symbolic name of the advanced transclusion
dialog.
Change-Id: I51e74b322aec9a4c3918e6f792bdb3d318060979
Only register them if they aren't already registered, so we're compatible
with versions of MW core with and without oojs.
Change-Id: I5dbb480e8330ceaf0531c194b8ef6cc6c65f537e
Changes include:
* Target mobile for ve dependencies
* Create mobile view constructor
** Some tools like dialogs are excluded for now
* Refactor mw.target to permit code reuse
** Split out pageTarget view functionality from core init methods
Change-Id: I786b63ab57518fc6af7761501259ed66592f70e3
When the target of an autonumbered link is changed to a URL, it's kept
as an autonumbered link and its target is updated. When the target is
changed to a MediaWiki page, the autonumbered link is removed and
replaced with an internal link with the text set to the target.
So for instance, if you inspect [http://www.example.com] and change
its target to "Foo", the result will be [[Foo]].
The core of this commit adds support for inspecting nodes to
ve.ui.LinkInspector. This support should probably move into a
class in between AnnotationInspector and LinkInspector, perhaps
called HybridInspector or something, but I'm deferring that for now.
LinkInspector allows changes to inspected nodes to be reflected either
as attribute changes on the node, or by replacing the node with something
else. MWLinkInspector uses this feature to replace the autonumbered
external link node with an internal link annotation when the target is
set to an external link.
Bug: 53505
Change-Id: Icb404af84c24574438e4de3ef05bbd1993b593f7
* changes:
Plain text paste with paste special
Use rare unicode characters for paste placeholders
Rich paste
Add fixUpInsertion to newFromDocumentReplace
Allow pasting of rich (HTML) content.
ve.ce.Surface
* Use a sliced document clone for converting to DM HTML (copy)
* Add full context to pasteTarget before copying
* Add ve-pasteProtect class to spans to prevent them being dropped
* Implement external paste by converting HTML to data and inserting
with newFromDocumentInsertion
* Remove clipboard key placeholder after read so they aren't picked
up by rich paste. Hash no longer includes the placeholder.
* Detect the corruption of important spans and fallback to clipboard
data HTML if available.
ve.dm.LinearData
* Add clone method for copy
ve.dm.ElementLinearData
* Add compareUnannotated for use by context diffing.
* Add sanitize method for cleaning data according to a set of rules.
ve.dm.Transaction
* Add range parameter for inserting a range of a document only,
e.g. stripping the paste context.
ve.dm.Document
* Implement sliced document clone creation so that DM HTML
is generated correctly in onCopy
ve.dm.DocumentSlice
* Replaces LinearDataSlice. Now has two ranges for balanced data
and data with a full context.
ve.init.Target.js
* Define default, loose, paste rules (just remove aliens).
ve.init.mw.ViewPageTarget
* Define strict MW paste rules:
+ no links, spans, underlines
+ no images, divs, aliens
+ strip extra HTML attribues
ve.init.sa.Target, ve.init.mw.ViewPageTarget, ve.ui.Surface
* Pass through and store paste rules.
Bug: 41193
Bug: 48170
Bug: 50128
Bug: 53828
Change-Id: I38d63e31ee3e3ee11707e3fffed5174e1d633b42
Add paction=serializeforcache, which serializes the given HTML, stores
the resulting wikitext in memcached, and returns a cache key. This
cache key can then be passed instead of HTML to paction=diff or
action=visualeditoredit for quick diff/save operations using the
cached wikitext, or to paction=serialize to just retrieve the wikitext.
This lays the groundwork for front-loading serialization in the editor,
and for avoiding the double serialization that occurs when the user
first views the diff, then saves.
Bug: 55979
Bug: 56011
Change-Id: I223b1717890632c39e2509967149551f807119f8
Changes:
* Cleanup the window API to use more consistent and intuitive methods - we
now use initialize/setup/teardown instead of
initialize/onSetup/onOpen/onClose as methods which are overridden, and
use open/close methods to control the window
* Change events around to have opening/open and closing/close events which
act as before/after points during the opening/closing process
* Make WindowSet and Context respond to windows being opened, rather than
opening them directly
* Fix a LinkInspector creation mode bug where the initial text doesn't get
reset
* Move inspector, a VisualEditor concept, back to VE
* Cleanup naming of SurfaceDialog, SurfaceToolbar, etc. to use shorter
names, they were given Surface* names when the generic ones were also in
VE, but now the generic ones are in OO, so they can return to their
original names
Change-Id: I82c4fed8bcb3fb5630938c8bc4dd9b2d5f1a8c1d
If configured to do so, the VE API will forward the Cookie: header to
Parsoid. This allows VisualEditor to be used on read-restricted wikis.
Bug: 44483
Change-Id: If4a0cf1e5785b332ec9b014b783412805cf8af75
By serialising the current DOM, and injecting it into a form we can
end up in the source editor with our VE changes converted.
Bug: 50687
Change-Id: Iafcc02a737d9c6c3a59dce1caff130d47ca25650
Objectives:
* Hamburger menu in actions area of toolbar
* Add tools that open specific pages in the meta dialog
* Fix support for using setPage in ve.ui.PagedOutlineLayout
* Allow passing setup config objects through window open calls
* Add dialog action, similar to inspector action
* Fix incorrect or missing documentation
Change-Id: I2d2c9b87554fb2a0c90ed6944a58b38a37efa712
Changes:
* Pass toolGroup into tools instead of toolbar
* Split tool labels into title and accel
* Make toolbars provide accelerator labels
* Remove getLabelText method since it's not being used and is likely not useful
* Make tools update their own labels
* Only show accelerator information for triggers that are active in the surface
* Make surface toolbars listen to commands being added and update tools accordingly
* Introduce command object to encapsulate command info
Change-Id: Ieac4bfa63b63ac0a9dee154af3007a33b4d447ff
* Move and rename generic parts of ve.ui to OO.ui
* We now have a UI test suite because ve.Element (outside ve.ui)
is now part of oojs-ui, so it needs a test suite.
* Added to the MW test run (just like we do for unicodejs).
* Updated csslint config (also added ve-mw and syntaxhighlight
which were missing).
oojs-ui still depends on the TriggerRegistry in VE, this is addressed
in a follow-up commit.
Change-Id: Iec147155c1ddf20b73a4d15d87b8742207032312
Math, hiero, language and alienextension are now each in their own
module. Kept the experimental module for backwards compatibility,
it just has all of its constituent modules as dependencies.
MWExperimentalTool.js was split up, and ExperimentalTool.js was
renamed to LanguageInspectorTool.js.
Change-Id: I63b49dfbdb59dc9a494049553cc0c01e89e48826
Since I0f0a826c in Parsoid, numbered external links are now empty
<a rel="mw:ExtLink"></a> tags. This means we have to put in a node type
for them to prevent them from being considered empty annotations and
getting converted to alienMeta.
MWNumberedExternalLinkNode is protected and focusable to avoid making
the link text (which isn't editable) clickable. It isn't inspectable
yet, we need to work on that.
Bug: 53505
Change-Id: I83f69695f3974089e51a84e799f31ab6ed879e05
Using the MW APIs get a resized version of the image and use
GeneratedContentNode to cache the url.
Bug: 55697
Change-Id: I418f7e1464663f447d46de7ffc29aa5f52d23b12
* Followup 75270e24: use this.surface directly in MWMetaDialog
* Document that MWDialogTools need a SurfaceToolbar
* Namespace CE events and CSS classes with ve-ce- rather than ve-ui-
* Namespace SurfaceToolbar CSS classes correctly and put them in their
own CSS file
Change-Id: I9e70917d9c220b39e68833f67ed49fae7f7cbe6a
Major changes:
* Create a MW specific save dialog class
* Widgetize save dialog elements
* Simplification of viewPageTarget
Minor changes:
* Added getWindow method to windowSet and setTitle methods to window class
* Add transition css properties to dialog styles
Bug: 48566
Bug: 50722
Bug: 51918
Bug: 52175
Bug: 53313
Change-Id: I8c0db01fb8477a9b3d3dfe2a6073ac67869ce40e
$supportedSkins is mostly an artefact of the currently-unrefactored init code that
will have a sub-class for each skin (so skin's maintainers can add VisualEditor
support without hacking around inside VisualEditor itself), but until then let's
split it out into a global configuration variable at least, so that they have a
hope.
Change-Id: I0742cea6469678c5599768340dfb1f6d2f4debf4
Objective:
* Remove surface dependencies in dialogs, inspectors, windows and window sets
* Introduce surface-specific versions of dialogs, inspectors and window sets
Change-Id: I2db59127d2085b02e173a3605e174317e419e213
Previously we returned ElementLinearData from the converter, then
stripped out the MetaLinearData. This meant that before processing
the ElementLinearData from the converter actually contained metadata
which is confusing.
The new document constructor stores the converter results in a
FlatLinearData object and simultaneously populates element and meta
data stores.
Also in this commit I have moved various methods from ElementLinearData
to FlatLinearData, from which ElementLinearData inherits.
Change-Id: I64561bde2c31d8f703c13ac7b0a0c5f7ade9f3d4
When the editor finishes retrieving the target DOM, fire a 'DOM retrieved'
analytic event with the following properties:
* Response time in millisecond.
* Response size in bytes.
* Whether request was a cache hit.
* Value of X-Parsoid-Performance header (or null if unset).
jQuery.byteLength is now a dependency for ext.visualEditor.mediawiki.
Change-Id: I74d3964238927645e847b6e215991bd6b1ebad59
Objectives:
* Use widgets to render toolbar actions
* Remove labels next to help notices and edit notices buttons
* Add a close button to the help notices and edit notices
Overview:
* ve.ui.ButtonWidget is now abstract, use ve.ui.PushButtonWidget instead
* ve.ui.IconButtonWidget now inherits from ve.ui.ButtonWidget
* ve.ui.PopupWidget's display method no longer takes x and y arguments
* Fixup naming issues in MWCategoryPopupWidget
* Fixup naming issues with some ve-init-mw CSS classes
* Rename ve-mw/ui/styles/ve.ui.Widget.css to ve.ui.MWWidget.css
* Change uses of "callout" to "tail"
* Add hyperlink functionality to buttons
* Make buttons accessible through focusing, but make unfocusable by
clicking
* Add head option to popup for rendering a title and close button
Bug: 52386
Change-Id: Iea2c8df1be64d40f9c039873d89ee540cc56e687
This commit extracts the page and outline handling logic from
ve.ui.PagedDialog (RIP) and moves it into two layouts: ve.ui.PagedLayout
and ve.ui.PagedOutlineLayout, respectively. These layouts are now implemented
inside the dialogs that used to mixin the ve.ui.PagedDialog class. This
brings a much cleaner separation of concerns between Dialogs and Layouts
and allows the use of page handling logic without the accompanying
outline logic.
Change-Id: I5efa2f893f4b7e962438b3aff34b737573bbd5ca
Objective:
* Make ve.Factory behave like ve.NamedClassFactory
* Remove the only remaining use of ve.Factory (actions)
* Remove ve.NamedClassFactory
Change-Id: Ie302ef5ea31081de7ab0db6091058a59946aef4c
Document slice only ever contained linear data, with extra functionality
to preserve the range. It pre-dated LinearData, but now we should
refactor it to reflect its purpose.
Change-Id: Ifc908f7526c83a43a51372c8d2494d7260e7facd
Currently we just say 'group ""' which is a bit weird, so
instead have a specific message which talks about the
'default group'.
Bug: 51873
Change-Id: I4a17f15ee18175fac11b36b102a06cc9714426ee
Update: Switched to generic ve.ui.Toolbar and ve.ui.Tool for consistency
with VE in general. Changed searchbox to floating and hidden by default.
Call for search using shortcut key. Overriden ESC key.
Node handler for <syntaxhighlight>'s Rdfa type.
Embedded in VisualEditor.php with its own ResourceLoader module.
Use $wgVisualEditorEnableExperimentalCode in LocalSettings.php
to load the module.
Supported languages (for testing): text, javascript
Features:
(1) Internal mechanisms:
(1.1) Tokenizer. Tokenize input code string.
(1.2) Highlighter. Highlight based on predefined rules.
(1.3) Syntax checker. Validate based on predefined rules.
(2) SimpleSurface:
(2.1) Auto indenter. Works with (){}[] blocks.
(2.2) Reformatter. Reformats spaces and remove trailing
whitespaces.
(2.3) Language selection dropdown.
(2.4) Basic editing. Insert, deletion, selection.
(2.5) Clipboard & edit history support.
(2.5.1) Undo (Ctrl + Z), redo (Ctrl + Y)
(2.5.2) Copy (Ctrl + C), cut (Ctrl + X), paste (Ctrl + V)
(2.6) Search & replace. Ctrl + F to quickly move focus to search
box.
Bug 47742
Change-Id: I4adede9e05fd2236cee50ce03f597e8ff6b1914d
VisualEditor's hook changes the edit section link, which changes the
output of certain parser tests so that they no longer match the
expected text. Use the `ParserTestsGlobal` hook (which cleans up
after itself when the parserTests ends) to disable the
`onDoEditSectionLink` hook when we're running parserTests to avoid
the spurious failures.
Change-Id: Ic958d88f443ac37ba304d3256e2bb5ea2fde820d
Toolbars may want to control the target as well as the surface (spoiler alert!).
The new TargetToolbar has a pointer to its target as well as its surface.
Change-Id: I928316d9e23ac3f3de3e76c34ef0ac3d27855ab3
Objectives:
* Scroll when needed to show highlighted (with keyboard) or selected (by
any means) options in select widgets
* Allow clipping and automatic scrolling for certain elements when they
are otherwise going to be rendered partially out of view
Changes:
*.php
* Add links to new file
ve.ui.Widget.css, ve.ui.Dialog.css
* Removed unneeded x-axis overflow rules
ve.ui.ClippableElement.js, ve.ui.Element.css
* New mixin, adds visible area clipping support to an element
ve.ui.PopupToolGroup.js, ve.ui.MenuWidget.js
* Mixin clippable element
ve.ui.OptionWidget.js, ve.ui.OutlineItemWidget.js
* Add scroll-into-view configuration for option widgets
ve.ui.SearchWidget.js
* Scroll items into view when highlighting with keyboard
ve.Element.js
* Add getBorders, getDimensions, getClosestScrollableContainer and
scrollIntoView static methods
* Add getClosestScrollableElementContainer and scrollElementIntoView
methods
Bug: 53610
Change-Id: Ie21faa973a68f517c7cfce8bd879b5317f536365
These were meant to have been de-experimental-ised with the toolbar
commit; oh well. This moves the following text styles from being in
"experimental" mode to being regular annotations:
* Code
* Strikethrough
* Subscript
* Superscript
* Underline
Change-Id: I21be2dc844b47b825d7a1e48a592067166ecd122
modules/ve/ve.EventSequencer.js
* Class to sequence pre-event and post-event listening correctly
demos/ve/eventSequencer.html
* Plain HTML example page for testing EventSequencer and event sequences
Change-Id: I4ddb10a30c2f44015136a7978a185d0b13f0690b
Objectives:
* Got rid of mw prefixing in tools, inspectors and dialogs
* Simplify tool classes so they can be generically used as items in bars, lists and menus
* Add support for a catch-all toolbar group
* Simplify tool registration, leaning on tool classes' static name property
* Move default commands to command registry
* Move default triggers to trigger registry
* Get language tool working in standalone
Change-Id: Ic97a636f9a193374728629931b6702bee1b3416a
By passing in the information via a ResourceLoaderModule this
gets around any concerns with performance (version information
is read from the file system).
The version information is appended to the beta toolbar dialog.
Bug: 53050
Change-Id: I7836e1d4003416cbb7e18e3435aa87d82fd5c2e2
Also..
* removed an incorrrect comment referring to the old module
name (standalone didn't use the VisualEditorMessagesModule).
* made it use debug mode to determine whether to minify or
prettify the js code.
Change-Id: I493007649fba27e7faab0cf743eded5f68714c50
This patch rounds off change I29740fa7a by replacing calls to EventLogging's
eventLog.logEvent with calls to VisualEditor's ve.track. ve.track publishes
events by providing an interface, ve.trackRegisterHandler, which event handlers
use to subscribe to VisualEditor events. By making it the responsibility of the
web analytics framework to register itself as a handler, VisualEditor can
remain decoupled from (and indeed ignorant of) any particular event logging
implementation. This allows VisualEditor to be integrated with many different
web analytics platforms with nothing more than a bit of glue code for mapping
ve's event semantics to those of the target platform.
The practical difference that this makes is that it frees VisualEditor from
having to know about EventLogging or from having to load EventLogging
components, which means we can remove quite a lot of gnarly code. My current
plan is to migrate the code for registering and loading the 'Edit'
schema module to Extension:CoreEvents, which is also where I'll commit the
handler for VE events. (CoreEvents exists precisely to provide an organized
place for persistent but WMF-particular instrumentation.)
Once this patch is merged and deployed, the following two configuration
variables may be removed from mediawiki-config:
- $wgVisualEditorEnableSplitTest
- $wgVisualEditorEnableEventLogging
Change-Id: Idfdf692668d2adfbe029e8f0c4ff9e96c60ff741
VisualEditor.i18n.php, VisualEditor.php
* Button title
* New experimental files
ve.*.MWAlienExtensionNode.js
* Very basic extension of ve.*.MWExtensionNode
ve.ui.MWAlienExtensionInspector.js
* Default to inline-block for wrapper. Should probably
get rid of styled wrappers for GeneratedContent eventually.
ve.ui.MWAlienExtensionInspector.js
* Basic extension of MWExtensionInspector. Override title to
use tag name e.g. '<easytimeline>'. Could be changed in future
to 'Extension: easytimeline' or similar.
*.png, *.svg, *Icons*.css, ve.ui.MWAlienExtensionButtonTool.js
* Angle bracket icon for button (open to suggestions)
ve.ui.MWInspector.css
* Make extension inspector text input tall by default.
Change-Id: I07f0686839192cad3cd8dfd3233ae907fe5cdf6a
The grouping behavior is unnecessary for the main payload, and
actively hurting us for the init-init module.
Change-Id: I111e28e5c759bf43412c5b1432ec9c8a2102d7dc
Mostly as a demonstration of how easy this is with MWExtensionNode.
The icon was chosen with the following criteria:
1. Recognisable (the ankh is quite common in popular culture, right?)
2. Doesn't look idiotic to academics (I've consulted an Egyptology
PhD and they can confirm it's not the glyph for penis)
3. Renders well at <16x16
That said it does look a little like a stick man...
Bug: 43118
Change-Id: I9f9e8af501401866bfeecf0eec3690a705fbd4db
MWMath and other simple extensions all behave in a similar way, e.g.
<tagname>Foreign syntax</tagname>.
This creates a base class that should make supporting such extensions,
and editing their contents in a plain text box, very simple.
Change-Id: Icc0acb33fe32704f71dacb552d9dfa3142eaef2b
