pictcode_admin / lib / Cake / View / ViewBlock.php @ master
履歴 | 表示 | アノテート | ダウンロード (5.893 KB)
| 1 | 5ad38a95 | spyder1211 | <?php
|
|---|---|---|---|
| 2 | /**
|
||
| 3 | * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
|
||
| 4 | * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
|
||
| 5 | *
|
||
| 6 | * Licensed under The MIT License
|
||
| 7 | * For full copyright and license information, please see the LICENSE.txt
|
||
| 8 | * Redistributions of files must retain the above copyright notice.
|
||
| 9 | *
|
||
| 10 | * @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
|
||
| 11 | * @link http://cakephp.org CakePHP(tm) Project
|
||
| 12 | * @since CakePHP(tm) v2.1
|
||
| 13 | * @license http://www.opensource.org/licenses/mit-license.php MIT License
|
||
| 14 | */
|
||
| 15 | |||
| 16 | /**
|
||
| 17 | * ViewBlock implements the concept of Blocks or Slots in the View layer.
|
||
| 18 | * Slots or blocks are combined with extending views and layouts to afford slots
|
||
| 19 | * of content that are present in a layout or parent view, but are defined by the child
|
||
| 20 | * view or elements used in the view.
|
||
| 21 | *
|
||
| 22 | * @package Cake.View
|
||
| 23 | */
|
||
| 24 | class ViewBlock { |
||
| 25 | |||
| 26 | /**
|
||
| 27 | * Append content
|
||
| 28 | *
|
||
| 29 | * @var string
|
||
| 30 | */
|
||
| 31 | const APPEND = 'append'; |
||
| 32 | |||
| 33 | /**
|
||
| 34 | * Prepend content
|
||
| 35 | *
|
||
| 36 | * @var string
|
||
| 37 | */
|
||
| 38 | const PREPEND = 'prepend'; |
||
| 39 | |||
| 40 | /**
|
||
| 41 | * Block content. An array of blocks indexed by name.
|
||
| 42 | *
|
||
| 43 | * @var array
|
||
| 44 | */
|
||
| 45 | protected $_blocks = array(); |
||
| 46 | |||
| 47 | /**
|
||
| 48 | * The active blocks being captured.
|
||
| 49 | *
|
||
| 50 | * @var array
|
||
| 51 | */
|
||
| 52 | protected $_active = array(); |
||
| 53 | |||
| 54 | /**
|
||
| 55 | * Should the currently captured content be discarded on ViewBlock::end()
|
||
| 56 | *
|
||
| 57 | * @var bool
|
||
| 58 | * @see ViewBlock::end()
|
||
| 59 | * @see ViewBlock::startIfEmpty()
|
||
| 60 | */
|
||
| 61 | protected $_discardActiveBufferOnEnd = false; |
||
| 62 | |||
| 63 | /**
|
||
| 64 | * Start capturing output for a 'block'
|
||
| 65 | *
|
||
| 66 | * Blocks allow you to create slots or blocks of dynamic content in the layout.
|
||
| 67 | * view files can implement some or all of a layout's slots.
|
||
| 68 | *
|
||
| 69 | * You can end capturing blocks using View::end(). Blocks can be output
|
||
| 70 | * using View::get();
|
||
| 71 | *
|
||
| 72 | * @param string $name The name of the block to capture for.
|
||
| 73 | * @throws CakeException When starting a block twice
|
||
| 74 | * @return void
|
||
| 75 | */
|
||
| 76 | public function start($name) { |
||
| 77 | if (in_array($name, $this->_active)) { |
||
| 78 | throw new CakeException(__d('cake', "A view block with the name '%s' is already/still open.", $name)); |
||
| 79 | } |
||
| 80 | $this->_active[] = $name; |
||
| 81 | ob_start(); |
||
| 82 | } |
||
| 83 | |||
| 84 | /**
|
||
| 85 | * Start capturing output for a 'block' if it is empty
|
||
| 86 | *
|
||
| 87 | * Blocks allow you to create slots or blocks of dynamic content in the layout.
|
||
| 88 | * view files can implement some or all of a layout's slots.
|
||
| 89 | *
|
||
| 90 | * You can end capturing blocks using View::end(). Blocks can be output
|
||
| 91 | * using View::get();
|
||
| 92 | *
|
||
| 93 | * @param string $name The name of the block to capture for.
|
||
| 94 | * @return void
|
||
| 95 | */
|
||
| 96 | public function startIfEmpty($name) { |
||
| 97 | if (empty($this->_blocks[$name])) { |
||
| 98 | return $this->start($name); |
||
| 99 | } |
||
| 100 | $this->_discardActiveBufferOnEnd = true; |
||
| 101 | ob_start(); |
||
| 102 | } |
||
| 103 | |||
| 104 | /**
|
||
| 105 | * End a capturing block. The compliment to ViewBlock::start()
|
||
| 106 | *
|
||
| 107 | * @return void
|
||
| 108 | * @see ViewBlock::start()
|
||
| 109 | */
|
||
| 110 | public function end() { |
||
| 111 | if ($this->_discardActiveBufferOnEnd) { |
||
| 112 | $this->_discardActiveBufferOnEnd = false; |
||
| 113 | ob_end_clean(); |
||
| 114 | return;
|
||
| 115 | } |
||
| 116 | if (!empty($this->_active)) { |
||
| 117 | $active = end($this->_active); |
||
| 118 | $content = ob_get_clean();
|
||
| 119 | if (!isset($this->_blocks[$active])) { |
||
| 120 | $this->_blocks[$active] = ''; |
||
| 121 | } |
||
| 122 | $this->_blocks[$active] .= $content; |
||
| 123 | array_pop($this->_active); |
||
| 124 | } |
||
| 125 | } |
||
| 126 | |||
| 127 | /**
|
||
| 128 | * Concat content to an existing or new block.
|
||
| 129 | * Concating to a new block will create the block.
|
||
| 130 | *
|
||
| 131 | * Calling concat() without a value will create a new capturing
|
||
| 132 | * block that needs to be finished with View::end(). The content
|
||
| 133 | * of the new capturing context will be added to the existing block context.
|
||
| 134 | *
|
||
| 135 | * @param string $name Name of the block
|
||
| 136 | * @param mixed $value The content for the block
|
||
| 137 | * @param string $mode If ViewBlock::APPEND content will be appended to existing content.
|
||
| 138 | * If ViewBlock::PREPEND it will be prepended.
|
||
| 139 | * @return void
|
||
| 140 | */
|
||
| 141 | public function concat($name, $value = null, $mode = ViewBlock::APPEND) { |
||
| 142 | if (isset($value)) { |
||
| 143 | if (!isset($this->_blocks[$name])) { |
||
| 144 | $this->_blocks[$name] = ''; |
||
| 145 | } |
||
| 146 | if ($mode === ViewBlock::PREPEND) { |
||
| 147 | $this->_blocks[$name] = $value . $this->_blocks[$name]; |
||
| 148 | } else {
|
||
| 149 | $this->_blocks[$name] .= $value; |
||
| 150 | } |
||
| 151 | } else {
|
||
| 152 | $this->start($name); |
||
| 153 | } |
||
| 154 | } |
||
| 155 | |||
| 156 | /**
|
||
| 157 | * Append to an existing or new block. Appending to a new
|
||
| 158 | * block will create the block.
|
||
| 159 | *
|
||
| 160 | * Calling append() without a value will create a new capturing
|
||
| 161 | * block that needs to be finished with View::end(). The content
|
||
| 162 | * of the new capturing context will be added to the existing block context.
|
||
| 163 | *
|
||
| 164 | * @param string $name Name of the block
|
||
| 165 | * @param string $value The content for the block.
|
||
| 166 | * @return void
|
||
| 167 | * @deprecated 3.0.0 As of 2.3 use ViewBlock::concat() instead.
|
||
| 168 | */
|
||
| 169 | public function append($name, $value = null) { |
||
| 170 | $this->concat($name, $value); |
||
| 171 | } |
||
| 172 | |||
| 173 | /**
|
||
| 174 | * Set the content for a block. This will overwrite any
|
||
| 175 | * existing content.
|
||
| 176 | *
|
||
| 177 | * @param string $name Name of the block
|
||
| 178 | * @param mixed $value The content for the block.
|
||
| 179 | * @return void
|
||
| 180 | */
|
||
| 181 | public function set($name, $value) { |
||
| 182 | $this->_blocks[$name] = (string)$value; |
||
| 183 | } |
||
| 184 | |||
| 185 | /**
|
||
| 186 | * Get the content for a block.
|
||
| 187 | *
|
||
| 188 | * @param string $name Name of the block
|
||
| 189 | * @param string $default Default string
|
||
| 190 | * @return string The block content or $default if the block does not exist.
|
||
| 191 | */
|
||
| 192 | public function get($name, $default = '') { |
||
| 193 | if (!isset($this->_blocks[$name])) { |
||
| 194 | return $default; |
||
| 195 | } |
||
| 196 | return $this->_blocks[$name]; |
||
| 197 | } |
||
| 198 | |||
| 199 | /**
|
||
| 200 | * Check if a block exists
|
||
| 201 | *
|
||
| 202 | * @param string $name Name of the block
|
||
| 203 | * @return bool
|
||
| 204 | */
|
||
| 205 | public function exists($name) { |
||
| 206 | return isset($this->_blocks[$name]); |
||
| 207 | } |
||
| 208 | |||
| 209 | /**
|
||
| 210 | * Get the names of all the existing blocks.
|
||
| 211 | *
|
||
| 212 | * @return array An array containing the blocks.
|
||
| 213 | */
|
||
| 214 | public function keys() { |
||
| 215 | return array_keys($this->_blocks); |
||
| 216 | } |
||
| 217 | |||
| 218 | /**
|
||
| 219 | * Get the name of the currently open block.
|
||
| 220 | *
|
||
| 221 | * @return mixed Either null or the name of the last open block.
|
||
| 222 | */
|
||
| 223 | public function active() { |
||
| 224 | return end($this->_active); |
||
| 225 | } |
||
| 226 | |||
| 227 | /**
|
||
| 228 | * Get the names of the unclosed/active blocks.
|
||
| 229 | *
|
||
| 230 | * @return array An array of unclosed blocks.
|
||
| 231 | */
|
||
| 232 | public function unclosed() { |
||
| 233 | return $this->_active; |
||
| 234 | } |
||
| 235 | |||
| 236 | } |