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PhutilRemarkupBlockStorage.php
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Created
Sun, Aug 25, 17:29
Size
2 KB
Mime Type
text/x-php
Expires
Tue, Aug 27, 17:29 (2 d)
Engine
blob
Format
Raw Data
Handle
20172412
Attached To
rPHU libphutil
PhutilRemarkupBlockStorage.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.
*/
/**
* Remarkup prevents several classes of text-processing problems by replacing
* tokens in the text as they are marked up. For example, if you write something
* like this:
*
* //D12//
*
* It is processed in several stages. First the "D12" matches and is replaced:
*
* //\11Z//
*
* Now the italics match and are replaced:
*
* \12Z
*
* When processing completes, all the tokens are replaced again in reverse
* order:
*
* <em>\11Z</em>
*
* Then:
*
* <em><a href="http://...">...</a></em>
*
* If we didn't do this, the italics rule could match the "//" in "http://",
* or any other number of processing mistakes could occur, some of which create
* security risks.
*
* This class generates keys, and stores the map of keys to replacement text.
*
* @group markup
*/
final
class
PhutilRemarkupBlockStorage
{
private
$map
=
array
();
private
$index
;
public
function
store
(
$text
)
{
$key
=
"
\1
"
.(++
$this
->
index
).
"Z"
;
$this
->
map
[
$key
]
=
$text
;
return
$key
;
}
public
function
restore
(
$corpus
)
{
if
(
$this
->
map
)
{
$corpus
=
str_replace
(
array_reverse
(
array_keys
(
$this
->
map
)),
array_reverse
(
$this
->
map
),
$corpus
);
$this
->
map
=
array
();
}
return
$corpus
;
}
public
function
overwrite
(
$key
,
$new_text
)
{
$this
->
map
[
$key
]
=
$new_text
;
return
$this
;
}
public
function
getMap
()
{
return
$this
->
map
;
}
public
function
setMap
(
array
$map
)
{
$this
->
map
=
$map
;
return
$this
;
}
}
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