The "download" attribute on the button only functions for same-origin
requests; thus, the download endpoint must be used in order for the
"Download" button to function for uploaded images which are stored in
S3, and thus served from a different origin.
This is only done for uploaded images; it does not address a similar
problem with Camo, when Camo is hosted on a different hostname.
Fixes: #19238.
This commit adds a tippy tooltip to the lightbox title which enables the
user to view the filename of an image if the filename is different than
the image title.
Fixes: #21333
Prefer a regexp match over using String#replace to strip expected
prefixes and suffixes because (a) it implicitly verifies that the
input has the expected format and (b) it won’t unexpectedly strip from
the middle of the string.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
With the recent changes to lightbox image handling in #21145 and #20788
it is no longer necessary to have panning and zooming disabled by
default. This commit removes the enable/disable button and instead
replaces it with a "Reset Image" button, and enables panning and zooming
as the default state of the lightbox.
This commit attempts to prevent images with long filenames,
descriptions, or author names displayed in the lightbox from altering
the layout of the page.
It also adds a title prop to both the filename and author, allowing a
user to hover and see a tooltip of the full text in the case where the
text is truncated.
Fixes#21058.
This commit adds a method to detect whether the draggable element has
moved out of view and if it has, move it back into view.
The panzoom library does have a `bounds` option that is supposed to
provide the functionality, but at the time of the commit it does not
appear to work correctly. Upstream bug:
https://github.com/anvaka/panzoom/issues/112
This PR changes the library used for panning and zooming in the lightbox
module from timmywil/panzoom to avanka/panzoom.
The original (timmywil) version of the library contains a bug where if
you have a high resolution touchpad and Firefox and you zoom in and out
repeatedly on an image, the image may drift. avanka/panzoom does not
appear to display this behavior.
Restores the behaviour from before 5f83bc5cfe, where clicking
outside the image closes the lightbox, primarily by way of swapping
out the panzoom library.
Fixes: #21163.
This commit adds a method of marking an overlay as being meant to be
left open despite click events triggering that would normally close it.
This is to prevent the case where a user drags an image and "unclicks"
in an area where normally clicking would close the overlay.
This commit attempts to revert the lightbox state (at least
the pan/zoom part of it) when the lightbox is closed. The open()
function has been turned into a factory function so that the zoom
control which is instantiated on initialization of the lightbox can be
passed in to the on_close handler of overlay.open().
This PR changes how the Pan & Zoom feature of images displayed in the
attachment lightbox are handled.
The existing method of using a canvas element is replaced by the Panzoom
library (timmywil/panzoom). This library is lightweight and has 0
transitive dependencies.
This fixes#20759 where the issue is that the viewport of a zoomed image
was not expanding to fill the available space on the page. Switching to
this new library also solves several other UX issues:
* Images are no longer blurred when in Pan & Zoom mode.
* The zoom behavior itself uses focal point zooming: zooming occurs
where the cursor is on the image instead of at the center of the
image, reducing the need for extra panning.
* CSS transitions are used for a more visually pleasing experience
when switching images, toggling zoom off, etc.
* The library has the potential to open other file types which
leaves that option open for us in the future.
Thumbor and tc-aws have been dragging their feet on Python 3 support
for years, and even the alphas and unofficial forks we’ve been running
don’t seem to be maintained anymore. Depending on these projects is
no longer viable for us.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
We convert the following elements to use a class instead of
id for accessing them across the codebase:
* markdown_preview
* undo_markdown_preview
* markdown_preview_spinner
* message_edit_content
* preview_content
Converted them together since changes to one impacted the other in
some modules like click_handlers.
Also, added a function in rows to get `message_row`.
We weren't exercising this method in any
meaningful way during the tests, and when
do add coverage, we probably want to just
test it directly.
We also kill off stub_selector(), which was
never well-documented.
Instead of prohibiting ‘return undefined’ (#8669), we require that a
function must return an explicit value always or never. This prevents
you from forgetting to return a value in some cases. It will also be
important for TypeScript, which distinguishes between undefined and
void.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
ES and TypeScript modules are strict by default and don’t need this
directive. ESLint will remind us to add it to new CommonJS files and
remove it from ES and TypeScript modules.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Prettier would do this anyway, but it’s separated out for a more
reviewable diff. Generated by ESLint.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
The `options` parameter is not being passed in any call
of `lightbox.open()` and it uses the same option i.e.
`lightbox_canvas` everytime which is now computed inside
`display_image()` directly.
`image` passed to lightbox.open() is already a jQuery object,
so we don't need to convert it explicitly. Also, the parameter
is renamed from `image` to `$image`.
Previously, lightbox.open() was responsible for retrieving
the image data from the DOM, saving it in `asset_map` and
finally displaying the image using that data. This
implementation wasn't correct for image list at bottom of
the lightbox because the `image` parameter passed to
lightbox.open() could contain more than one instances of
the image that had to be opened.
Now, the metadata of all the images in image-list is stored
in the `asset_map` while rendering the `image-list` inside
`render_lightbox_list_images()` and `lightbox.open()` only
looks for the metadata from `asset_map`.
Fixes#14152.
In case of video embeds, the previous logic used
`data-src-fullsize` or `src` as a key to look
for the metadata of video in `lightbox.open()`,
but while parsing, the key used while storing
the metadata was the video ID.
This doesn't make any sense because video's data
could never be accessed from `asset_map` and we
always needed to lookup the DOM for this.
This commit fixes this by using $img.attr('src')
as a key for `asset_map` for both, images and
videos. Since `src` is the link of preview image
in case of video embeds, it will always uniquely
determine the video ID and we won't loose
anything with the change in how videos handle
things.
Part of #14152.
Alex Vandiver
Austin Riba
Anders Kaseorg
Austin Riba
Ganesh Pawar
Aman Agrawal
Steve Howell
Priyank Patel
Hashir Sarwar
Tim Abbott