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PhabricatorMarkupInterface.php
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Tue, Feb 4, 01:38

PhabricatorMarkupInterface.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* An object which has one or more fields containing markup that can be
* rendered into a display format. Commonly, the fields contain Remarkup and
* are rendered into HTML. Implementing this interface allows you to render
* objects through @{class:PhabricatorMarkupEngine} and benefit from caching
* and pipelining infrastructure.
*
* An object may have several "fields" of markup. For example, Differential
* revisions have a "summary" and a "test plan". In these cases, the `$field`
* parameter is used to identify which field is being operated on. For simple
* objects like comments, you might only have one field (say, "body"). In
* these cases, the implementation can largely ignore the `$field` parameter.
*
* @task markup Markup Interface
*
* @group markup
*/
interface PhabricatorMarkupInterface {
/* -( Markup Interface )--------------------------------------------------- */
/**
* Get a key to identify this field. This should uniquely identify the block
* of text to be rendered and be usable as a cache key. If the object has a
* PHID, using the PHID and the field name is likley reasonable:
*
* "{$phid}:{$field}"
*
* @param string Field name.
* @return string Cache key.
*
* @task markup
*/
public function getMarkupFieldKey($field);
/**
* Build the engine the field should use.
*
* @param string Field name.
* @return PhutilRemarkupEngine Markup engine to use.
* @task markup
*/
public function newMarkupEngine($field);
/**
* Return the contents of the specified field.
*
* @param string Field name.
* @return string The raw markup contained in the field.
* @task markup
*/
public function getMarkupText($field);
/**
* Callback for final postprocessing of output. Normally, you can return
* the output unmodified.
*
* @param string Field name.
* @param string The finalized output of the engine.
* @param string The engine which generated the output.
* @return string Final output.
* @task markup
*/
public function didMarkupText(
$field,
$output,
PhutilMarkupEngine $engine);
/**
* Determine if the engine should try to use the markup cache or not.
* Generally you should use the cache for durable/permanent content but
* should not use the cache for temporary/draft content.
*
* @return bool True to use the markup cache.
* @task markup
*/
public function shouldUseMarkupCache($field);
}

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