Commit 4b42d78f by Qiang Xue

Fixes #1117: added support to map a single view directory to multiple themed view directories.

parent 30e85fae
......@@ -13,17 +13,38 @@ use yii\helpers\FileHelper;
/**
* Theme represents an application theme.
*
* A theme is directory consisting of view and layout files which are meant to replace their
* non-themed counterparts.
* When [[View]] renders a view file, it will check the [[Application::theme|active theme]]
* to see if there is a themed version of the view file exists. If so, the themed version will be rendered instead.
*
* Theme uses [[pathMap]] to achieve the file replacement. A view or layout file will be replaced
* with its themed version if part of its path matches one of the keys in [[pathMap]].
* Then the matched part will be replaced with the corresponding array value.
* A theme is directory consisting of view files which are meant to replace their non-themed counterparts.
*
* Theme uses [[pathMap]] to achieve the view file replacement:
*
* 1. It first looks for a key in [[pathMap]] that is a substring of the given view file path;
* 2. If such a key exists, the corresponding value will be used to replace the corresponding part
* in the view file path;
* 3. It will then check if the updated view file exists or not. If so, that file will be used
* to replace the original view file.
* 4. If Step 2 or 3 fails, the original view file will be used.
*
* For example, if [[pathMap]] is `['/web/views' => '/web/themes/basic']`,
* then the themed version for a view file `/web/views/site/index.php` will be
* `/web/themes/basic/site/index.php`.
*
* It is possible to map a single path to multiple paths. For example,
*
* ~~~
* 'pathMap' => [
* '/web/views' => [
* '/web/themes/christmas',
* '/web/themes/basic',
* ],
* ]
* ~~~
*
* In this case, the themed version could be either `/web/themes/christmas/site/index.php` or
* `/web/themes/basic/site/index.php`. The former has precedence over the latter if both files exist.
*
* To use a theme, you should configure the [[View::theme|theme]] property of the "view" application
* component like the following:
*
......@@ -75,16 +96,18 @@ class Theme extends Component
if (empty($this->pathMap)) {
if ($this->basePath !== null) {
$this->basePath = Yii::getAlias($this->basePath);
$this->pathMap = [Yii::$app->getBasePath() => $this->basePath];
$this->pathMap = [Yii::$app->getBasePath() => [$this->basePath]];
} else {
throw new InvalidConfigException('The "basePath" property must be set.');
}
}
$paths = [];
foreach ($this->pathMap as $from => $to) {
foreach ($this->pathMap as $from => $tos) {
$from = FileHelper::normalizePath(Yii::getAlias($from));
foreach ((array)$tos as $to) {
$to = FileHelper::normalizePath(Yii::getAlias($to));
$paths[$from . DIRECTORY_SEPARATOR] = $to . DIRECTORY_SEPARATOR;
$paths[$from . DIRECTORY_SEPARATOR][] = $to . DIRECTORY_SEPARATOR;
}
}
$this->pathMap = $paths;
if ($this->baseUrl === null) {
......@@ -103,15 +126,17 @@ class Theme extends Component
public function applyTo($path)
{
$path = FileHelper::normalizePath($path);
foreach ($this->pathMap as $from => $to) {
foreach ($this->pathMap as $from => $tos) {
if (strpos($path, $from) === 0) {
$n = strlen($from);
foreach ($tos as $to) {
$file = $to . substr($path, $n);
if (is_file($file)) {
return $file;
}
}
}
}
return $path;
}
......
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