Bug 172678 – Support a way to provide a suggested filename for <img src="data:..."> file creation (drag to desktop, save as context menu)

• Component: WebCore Misc.
• Status: NEW

[Joseph Pecoraro]

Summary:
Support a way to provide a suggested filename for <img src="data:..."> file creation (drag to desktop, save as context menu).

Test:
<img src="data:image/png;base64,...">

Existing Behavior:
• When dragging to Desktop => "Unknown.png"
• Right click > Save Image as => "Unknown.png"

Expected:
Web authors should be able to provide a suggested filename. For example:
<img src="data:image/png;base64,..." filename="dog.png">

Notes:
• This is somewhat related to Chrome's non-standard "DownloadURL" support. However that is only for Drag and Drop (not Save as) and requires JavaScript so won't work in some contexts.

[Joseph Pecoraro]

I'd like to propose a "filename" attribute on <img> for this purpose. Similar to the "download" attribute on <a> but because this doesn't affect behavior of the <img>; its just about a suggested filename.

[Radar WebKit Bug Importer]

<rdar://problem/32439969>

[Joseph Pecoraro]

Created attachment 311409 [details]
[PATCH] Proposed Fix

[Joseph Pecoraro]

I opened an HTML Spec issue:
<https://github.com/whatwg/html/issues/2722>