Rework image grid into a horizontal masonry
- The new server-based horizontal masonry enables tightly packed image grids even with images of varying aspect ratios - Additionally, the space an image takes is now allocated before it's loaded, reducing content shifting
This commit is contained in:
Hypolite Petovan
parent
fc5e60e97b
commit
3cc469c0b7
|
|
@ -3268,25 +3268,64 @@ class Item
|
|||
}
|
||||
|
||||
/**
|
||||
* Creates a horizontally masoned gallery with a fixed maximum number of pictures per row.
|
||||
*
|
||||
* For each row, we calculate how much of the total width each picture will take depending on their aspect ratio
|
||||
* and how much relative height it needs to accomodate all pictures next to each other with their height normalized.
|
||||
*
|
||||
* @param array $images
|
||||
* @return string
|
||||
* @throws \Friendica\Network\HTTPException\ServiceUnavailableException
|
||||
*/
|
||||
private static function makeImageGrid(array $images): string
|
||||
{
|
||||
// Image for first column (fc) and second column (sc)
|
||||
$images_fc = [];
|
||||
$images_sc = [];
|
||||
static $column_size = 2;
|
||||
|
||||
for ($i = 0; $i < count($images); $i++) {
|
||||
($i % 2 == 0) ? ($images_fc[] = $images[$i]) : ($images_sc[] = $images[$i]);
|
||||
$rows = array_map(
|
||||
function (array $row_images) {
|
||||
if ($singleImageInRow = count($row_images) == 1) {
|
||||
$row_images[] = $row_images[0];
|
||||
}
|
||||
|
||||
$widths = [];
|
||||
$heights = [];
|
||||
foreach ($row_images as $image) {
|
||||
$widths[] = $image['attachment']['width'];
|
||||
$heights[] = $image['attachment']['height'];
|
||||
}
|
||||
|
||||
$maxHeight = max($heights);
|
||||
|
||||
// Corrected height preserving aspect ratio when all images on a row are
|
||||
$correctedWidths = [];
|
||||
foreach ($widths as $i => $width) {
|
||||
$correctedWidths[] = $width * $maxHeight / $heights[$i];
|
||||
}
|
||||
|
||||
$totalWidth = array_sum($correctedWidths);
|
||||
|
||||
foreach ($row_images as $i => $image) {
|
||||
$row_images[$i]['gridWidth'] = $correctedWidths[$i];
|
||||
$row_images[$i]['gridHeight'] = $maxHeight;
|
||||
$row_images[$i]['heightRatio'] = 100 * $maxHeight / $correctedWidths[$i];
|
||||
// Ratio of the width of the image relative to the total width of the images on the row
|
||||
$row_images[$i]['widthRatio'] = 100 * $correctedWidths[$i] / $totalWidth;
|
||||
// This magic value will stay constant for each image of any given row and
|
||||
// is ultimately used to determine the height of the row container
|
||||
$row_images[$i]['commonHeightRatio'] = 100 * $correctedWidths[$i] / $totalWidth / ($widths[$i] / $heights[$i]);
|
||||
}
|
||||
|
||||
if ($singleImageInRow) {
|
||||
unset($row_images[1]);
|
||||
}
|
||||
|
||||
return $row_images;
|
||||
},
|
||||
array_chunk($images, $column_size)
|
||||
);
|
||||
|
||||
return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
|
||||
'columns' => [
|
||||
'fc' => $images_fc,
|
||||
'sc' => $images_sc,
|
||||
],
|
||||
'rows' => $rows,
|
||||
]);
|
||||
}
|
||||
|
||||
|
|
@ -3464,6 +3503,7 @@ class Item
|
|||
if (self::containsLink($item['body'], $src_url)) {
|
||||
continue;
|
||||
}
|
||||
|
||||
$images[] = ['src' => $src_url, 'preview' => $preview_url, 'attachment' => $attachment, 'uri_id' => $item['uri-id']];
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -685,22 +685,25 @@ audio {
|
|||
.imagegrid-row {
|
||||
display: -ms-flexbox; /* IE10 */
|
||||
display: flex;
|
||||
margin-top: 1em;
|
||||
/* Both the following values should be the same to ensure consistent margins between images in the grid */
|
||||
column-gap: 5px;
|
||||
margin-top: 5px;
|
||||
}
|
||||
|
||||
.imagegrid-column {
|
||||
-ms-flex: 50%; /* IE10 */
|
||||
flex: 50%;
|
||||
display: -ms-flexbox; /* IE10 */
|
||||
display: flex;
|
||||
flex-direction: column;
|
||||
row-gap: 5px;
|
||||
/* This helps allocating space for image before they loaded, preventing content shifting once they are
|
||||
* Inspired by https://www.smashingmagazine.com/2016/08/ways-to-reduce-content-shifting-on-page-load/
|
||||
* Please note: The space is effectively allocated using padding-bottom using the image ratio as a value.
|
||||
* In the image grid, this ratio isn't known in advance so no value is set in the stylesheet.
|
||||
*/
|
||||
.imagegrid-row figure {
|
||||
position: relative;
|
||||
}
|
||||
|
||||
.imagegrid-column img {
|
||||
-ms-flex: 50%; /* IE10 */
|
||||
flex: 50%;
|
||||
.imagegrid-row figure img{
|
||||
position: absolute;
|
||||
top: 0;
|
||||
right: 0;
|
||||
bottom: 0;
|
||||
left: 0;
|
||||
}
|
||||
/**
|
||||
* Image grid settings END
|
||||
|
|
|
|||
|
|
@ -1,5 +1,7 @@
|
|||
{{if $image.preview}}
|
||||
<a data-fancybox="{{$image.uri_id}}" href="{{$image.attachment.url}}"><img src="{{$image.preview}}" alt="{{$image.attachment.description}}" title="{{$image.attachment.description}}"></a>
|
||||
<a data-fancybox="{{$image.uri_id}}" href="{{$image.attachment.url}}">
|
||||
<img src="{{$image.preview}}" alt="{{$image.attachment.description}}" title="{{$image.attachment.description}}">
|
||||
</a>
|
||||
{{else}}
|
||||
<img src="{{$image.src}}" alt="{{$image.attachment.description}}" title="{{$image.attachment.description}}">
|
||||
{{/if}}
|
||||
|
|
|
|||
|
|
@ -1,12 +1,10 @@
|
|||
<div class="imagegrid-row">
|
||||
<div class="imagegrid-column">
|
||||
{{foreach $columns.fc as $img}}
|
||||
{{include file="content/image.tpl" image=$img}}
|
||||
{{foreach $rows as $images}}
|
||||
<div class="imagegrid-row" style="height: {{$images[0].commonHeightRatio}}%">
|
||||
{{foreach $images as $image}}
|
||||
{{* The absolute pixel value in the calc() should be mirrored from the .imagegrid-row column-gap value *}}
|
||||
<figure style="width: {{$image.widthRatio}}%; padding-bottom: calc({{$image.heightRatio * $image.widthRatio / 100}}% - 5px / 2)">
|
||||
{{include file="content/image.tpl" image=$image}}
|
||||
</figure>
|
||||
{{/foreach}}
|
||||
</div>
|
||||
<div class="imagegrid-column">
|
||||
{{foreach $columns.sc as $img}}
|
||||
{{include file="content/image.tpl" image=$img}}
|
||||
{{/foreach}}
|
||||
</div>
|
||||
</div>
|
||||
Loading…
Reference in New Issue
Block a user