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Merge pull request #12546 from oparoz/patch-1 

Send the mime icon if we can't generate a preview
This commit is contained in:
Björn Schießle 2015-06-22 13:55:17 +02:00
parent ced15c44b4 ba3b6f9be4
commit a88b370dc8
2 changed files with 51 additions and 21 deletions
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52
lib/private/preview.php
View File

@ -701,7 +701,7 @@ class Preview {
$this->generatePreview($fileId);
}
// We still don't have a preview, so we generate an empty object which can't be displayed
// We still don't have a preview, so we send back an empty object
if (is_null($this->preview)) {
$this->preview = new \OC_Image();
}
@ -712,22 +712,26 @@ class Preview {
/**
* Sends the preview, including the headers to client which requested it
*
* @param null|string $mimeType
* @param null|string $mimeTypeForHeaders the media type to use when sending back the reply
*
* @throws NotFoundException
*/
public function showPreview($mimeType = null) {
public function showPreview($mimeTypeForHeaders = null) {
// Check if file is valid
if ($this->isFileValid() === false) {
throw new NotFoundException('File not found.');
}
\OCP\Response::enableCaching(3600 * 24); // 24 hours
if (is_null($this->preview)) {
$this->getPreview();
}
if ($this->preview instanceof \OCP\IImage) {
$this->preview->show($mimeType);
if ($this->preview->valid()) {
\OCP\Response::enableCaching(3600 * 24); // 24 hours
} else {
$this->getMimeIcon();
}
$this->preview->show($mimeTypeForHeaders);
}
}
@ -812,9 +816,8 @@ class Preview {
*/
// It turns out the scaled preview is now too big, so we crop the image
if ($newPreviewWidth >= $askedWidth && $newPreviewHeight >= $askedHeight) {
list($newPreviewWidth, $newPreviewHeight) =
$this->crop($image, $askedWidth, $askedHeight, $newPreviewWidth, $newPreviewHeight);
$this->storePreview($fileId, $newPreviewWidth, $newPreviewHeight);
$this->crop($image, $askedWidth, $askedHeight, $newPreviewWidth, $newPreviewHeight);
$this->storePreview($fileId, $askedWidth, $askedHeight);
return;
}
@ -822,11 +825,10 @@ class Preview {
// At least one dimension of the scaled preview is too small,
// so we fill the space with a transparent background
if (($newPreviewWidth < $askedWidth || $newPreviewHeight < $askedHeight)) {
list($newPreviewWidth, $newPreviewHeight) =
$this->cropAndFill(
$image, $askedWidth, $askedHeight, $newPreviewWidth, $newPreviewHeight
);
$this->storePreview($fileId, $newPreviewWidth, $newPreviewHeight);
$this->cropAndFill(
$image, $askedWidth, $askedHeight, $newPreviewWidth, $newPreviewHeight
);
$this->storePreview($fileId, $askedWidth, $askedHeight);
return;
}
@ -894,8 +896,6 @@ class Preview {
* @param int $askedHeight
* @param int $previewWidth
* @param null $previewHeight
*
* @return \int[]
*/
private function crop($image, $askedWidth, $askedHeight, $previewWidth, $previewHeight = null) {
$cropX = floor(abs($askedWidth - $previewWidth) * 0.5);
@ -904,8 +904,6 @@ class Preview {
$cropY = 0;
$image->crop($cropX, $cropY, $askedWidth, $askedHeight);
$this->preview = $image;
return [$askedWidth, $askedHeight];
}
/**
@ -917,8 +915,6 @@ class Preview {
* @param int $askedHeight
* @param int $previewWidth
* @param null $previewHeight
*
* @return \int[]
*/
private function cropAndFill($image, $askedWidth, $askedHeight, $previewWidth, $previewHeight) {
if ($previewWidth > $askedWidth) {
@ -954,8 +950,6 @@ class Preview {
$image = new \OC_Image($backgroundLayer);
$this->preview = $image;
return [$askedWidth, $askedHeight];
}
/**
@ -1091,6 +1085,22 @@ class Preview {
}
}
/**
* Defines the media icon, for the media type of the original file, as the preview
*/
private function getMimeIcon() {
$image = new \OC_Image();
$mimeIconWebPath = \OC_Helper::mimetypeIcon($this->mimeType);
if (empty(\OC::$WEBROOT)) {
$mimeIconServerPath = \OC::$SERVERROOT . $mimeIconWebPath;
} else {
$mimeIconServerPath = str_replace(\OC::$WEBROOT, \OC::$SERVERROOT, $mimeIconWebPath);
}
$image->loadFromFile($mimeIconServerPath);
$this->preview = $image;
}
/**
* Stores the max preview in the cache
*

20
tests/lib/preview.php
View File

@ -209,6 +209,26 @@ class Preview extends TestCase {
);
}
/**
* Tests if unsupported previews return an empty object
*/
public function testUnsupportedPreviewsReturnEmptyObject() {
$width = 400;
$height = 200;
// Previews for odt files are not enabled
$imgData = file_get_contents(\OC::$SERVERROOT . '/tests/data/testimage.odt');
$imgPath = '/' . self::TEST_PREVIEW_USER1 . '/files/testimage.odt';
$this->rootView->file_put_contents($imgPath, $imgData);
$preview =
new \OC\Preview(self::TEST_PREVIEW_USER1, 'files/', 'testimage.odt', $width, $height);
$preview->getPreview();
$image = $preview->getPreview();
$this->assertSame(false, $image->valid());
}
/**
* We generate the data to use as it makes it easier to adjust in case we need to test
* something different