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Merge pull request #306 from nextcloud/sidebar-preview-text
Add large sidebar previews for text files
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Original file line number | Diff line number | Diff line change |
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/* | ||
* Copyright (c) 2016 | ||
* | ||
* This file is licensed under the Affero General Public License version 3 | ||
* or later. | ||
* | ||
* See the COPYING-README file. | ||
* | ||
*/ | ||
|
||
(function () { | ||
SidebarPreviewManager = function (fileList) { | ||
this._fileList = fileList; | ||
this._previewHandlers = {}; | ||
OC.Plugins.attach('OCA.Files.SidebarPreviewManager', this); | ||
}; | ||
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SidebarPreviewManager.prototype = { | ||
addPreviewHandler: function (mime, handler) { | ||
this._previewHandlers[mime] = handler; | ||
}, | ||
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getPreviewHandler: function (mime) { | ||
var mimePart = mime.split('/').shift(); | ||
if (this._previewHandlers[mime]) { | ||
return this._previewHandlers[mime]; | ||
} else if(this._previewHandlers[mimePart]) { | ||
return this._previewHandlers[mimePart]; | ||
} else { | ||
return this.fallbackPreview.bind(this); | ||
} | ||
}, | ||
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loadPreview: function (model, $thumbnailDiv, $thumbnailContainer) { | ||
var handler = this.getPreviewHandler(model.get('mimetype')); | ||
var fallback = this.fallbackPreview.bind(this, model, $thumbnailDiv, $thumbnailContainer); | ||
handler(model, $thumbnailDiv, $thumbnailContainer, fallback); | ||
}, | ||
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// previews for images and mimetype icons | ||
fallbackPreview: function (model, $thumbnailDiv, $thumbnailContainer) { | ||
var isImage = model.isImage(); | ||
var maxImageWidth = $thumbnailContainer.parent().width() + 50; // 50px for negative margins | ||
var maxImageHeight = maxImageWidth / (16 / 9); | ||
var smallPreviewSize = 75; | ||
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var isLandscape = function (img) { | ||
return img.width > (img.height * 1.2); | ||
}; | ||
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var isSmall = function (img) { | ||
return (img.width * 1.1) < (maxImageWidth * window.devicePixelRatio); | ||
}; | ||
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var getTargetHeight = function (img) { | ||
if (isImage) { | ||
var targetHeight = img.height / window.devicePixelRatio; | ||
if (targetHeight <= smallPreviewSize) { | ||
targetHeight = smallPreviewSize; | ||
} | ||
return targetHeight; | ||
} else { | ||
return smallPreviewSize; | ||
} | ||
}; | ||
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var getTargetRatio = function (img) { | ||
var ratio = img.width / img.height; | ||
if (ratio > 16 / 9) { | ||
return ratio; | ||
} else { | ||
return 16 / 9; | ||
} | ||
}; | ||
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this._fileList.lazyLoadPreview({ | ||
path: model.getFullPath(), | ||
mime: model.get('mimetype'), | ||
etag: model.get('etag'), | ||
y: isImage ? maxImageHeight : smallPreviewSize, | ||
x: isImage ? maxImageWidth : smallPreviewSize, | ||
a: isImage ? 1 : null, | ||
mode: isImage ? 'cover' : null, | ||
callback: function (previewUrl, img) { | ||
$thumbnailDiv.previewImg = previewUrl; | ||
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// as long as we only have the mimetype icon, we only save it in case there is no preview | ||
if (!img) { | ||
return; | ||
} | ||
$thumbnailDiv.removeClass('icon-loading icon-32'); | ||
var targetHeight = getTargetHeight(img); | ||
if (isImage && targetHeight > smallPreviewSize) { | ||
$thumbnailContainer.addClass((isLandscape(img) && !isSmall(img)) ? 'landscape' : 'portrait'); | ||
$thumbnailContainer.addClass('large'); | ||
} | ||
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// only set background when we have an actual preview | ||
// when we don't have a preview we show the mime icon in the error handler | ||
$thumbnailDiv.css({ | ||
'background-image': 'url("' + previewUrl + '")', | ||
height: (targetHeight > smallPreviewSize) ? 'auto' : targetHeight, | ||
'max-height': isSmall(img) ? targetHeight : null | ||
}); | ||
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var targetRatio = getTargetRatio(img); | ||
$thumbnailDiv.find('.stretcher').css({ | ||
'padding-bottom': (100 / targetRatio) + '%' | ||
}); | ||
}, | ||
error: function () { | ||
$thumbnailDiv.removeClass('icon-loading icon-32'); | ||
$thumbnailContainer.removeClass('image'); //fall back to regular view | ||
$thumbnailDiv.css({ | ||
'background-image': 'url("' + $thumbnailDiv.previewImg + '")' | ||
}); | ||
} | ||
}); | ||
} | ||
}; | ||
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OCA.Files.SidebarPreviewManager = SidebarPreviewManager; | ||
})(); |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,47 @@ | ||
/* | ||
* Copyright (c) 2016 | ||
* | ||
* This file is licensed under the Affero General Public License version 3 | ||
* or later. | ||
* | ||
* See the COPYING-README file. | ||
* | ||
*/ | ||
|
||
(function () { | ||
var SidebarPreview = function () { | ||
}; | ||
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SidebarPreview.prototype = { | ||
attach: function (manager) { | ||
manager.addPreviewHandler('text', this.handlePreview.bind(this)); | ||
}, | ||
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handlePreview: function (model, $thumbnailDiv, $thumbnailContainer, fallback) { | ||
console.log(model); | ||
var previewWidth = $thumbnailContainer.parent().width() + 50; // 50px for negative margins | ||
var previewHeight = previewWidth / (16 / 9); | ||
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this.getFileContent(model.getFullPath()).then(function (content) { | ||
$thumbnailDiv.removeClass('icon-loading icon-32'); | ||
$thumbnailContainer.addClass('large'); | ||
$thumbnailContainer.addClass('text'); | ||
var $textPreview = $('<pre/>').text(content); | ||
$thumbnailDiv.children('.stretcher').remove(); | ||
$thumbnailDiv.append($textPreview); | ||
$thumbnailContainer.css("max-height", previewHeight); | ||
}, function () { | ||
fallback(); | ||
}); | ||
}, | ||
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getFileContent: function (path) { | ||
console.log(path); | ||
var url = OC.linkToRemoteBase('files' + path); | ||
console.log(url); | ||
return $.get(url); | ||
} | ||
}; | ||
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OC.Plugins.register('OCA.Files.SidebarPreviewManager', new SidebarPreview()); | ||
})(); |
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