On Tuesday, November 30, 2021 at 6:48:07 PM UTC+1 Diego González wrote:

> Hola Yoav, 
>
> I wanted to add that we implemented the concept of a display-override to 
> control the fallback of display modes. For non supported browsers, 
> developers can also specify the display-override and even if this is not 
> supported it will default to the display value in the manifest file. 
>
>
>
> On Monday, 29 November 2021 at 18:29:41 UTC Diego González wrote:
>
>> Hola Yoav, 
>>
>> For non supported browsers there are 2 options: 
>>
>>    - env variables take the specified default value by developers (if 
>>    devs enable WCO).
>>
>>
So IIUC developers are supposed to use the env variables with reasonable 
fallback values for non-supporting browsers? Is that advice 
captured/documented somewhere?  

>
>>    - The web app will open as it would in the browser, with a titlebar 
>>    if installed (if devs don't enable WCO). 
>>
>>   WCO is enabled by the end user. The user must enable the feature by 
>> toggling the chevron on the controls overlay. This is remembered on 
>> subsequent app launches.
>>
>
OK, so lack of WCO support by the browser and lack of user opt-in would 
look the same from the developer's perspective?
 

>
>> --diego
>>
>> On Friday, 19 November 2021 at 06:05:44 UTC yoav...@chromium.org wrote:
>>
>>> This looks great! Thanks for following up on the spec work!!
>>>
>>> I had a couple more questions upthread:
>>>
>>>    - What are developers expected to do in non-supporting browsers?
>>>    - Would the user need to opt-in to having web app control over their 
>>>    title bar?
>>>
>>>
>>> On Fri, Nov 19, 2021 at 1:25 AM Diego González <die...@gmail.com> wrote:
>>>
>>>> the the new *new* spec update 
>>>> https://wicg.github.io/window-controls-overlay/
>>>>
>>>> On Wednesday, 17 November 2021 at 19:06:24 UTC Diego González wrote:
>>>>
>>>>> Hola,
>>>>>
>>>>> See the updated spec here: 
>>>>> https://wicg.github.io/window-controls-overlay. 
>>>>>
>>>>> Thanks
>>>>>
>>>>>
>>>>> On Monday, 15 November 2021 at 17:00:34 UTC Ajay Rahatekar wrote:
>>>>>
>>>>>> cc: ajayra...@google.com
>>>>>>
>>>>>> On Monday, November 15, 2021 at 8:53:37 AM UTC-8 Diego González wrote:
>>>>>>
>>>>>>> Hola Yoav, I am looking at making the amendments listed on the 
>>>>>>> github issues. I will update soon with the changes. Thanks 
>>>>>>>
>>>>>>> On Monday, 15 November 2021 at 08:44:41 UTC yoav...@chromium.org 
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Thanks Diego! The updates are a great improvement, but I suspect 
>>>>>>>> are not sufficient for an interoperable implementation. I left a 
>>>>>>>> couple of 
>>>>>>>> comments on the open issues.
>>>>>>>>
>>>>>>>> On Wed, Nov 10, 2021 at 5:11 PM Diego González <die...@gmail.com> 
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Hola Yoav,
>>>>>>>>>
>>>>>>>>> We've gone through several iterations of the WCO spec reviewed by 
>>>>>>>>> Joshua Bell from Google, and while we are still making changes to it, 
>>>>>>>>> we 
>>>>>>>>> believe it is in a much better state and want to resubmit for 
>>>>>>>>> consideration 
>>>>>>>>> of the approvals needed for I2S.  See the updated spec below:
>>>>>>>>> https://wicg.github.io/window-controls-overlay/
>>>>>>>>>
>>>>>>>>> --Diego
>>>>>>>>>
>>>>>>>>> On Thursday, 21 October 2021 at 21:05:09 UTC+1 
>>>>>>>>> yoav...@chromium.org wrote:
>>>>>>>>>
>>>>>>>>>> On Thursday, October 21, 2021 at 9:31:23 AM UTC+2 Yoav Weiss 
>>>>>>>>>> wrote:
>>>>>>>>>>
>>>>>>>>>>> This is an exciting improvement to PWA parity with native apps! 
>>>>>>>>>>> :) 
>>>>>>>>>>>
>>>>>>>>>>> On Wed, Oct 20, 2021 at 10:49 PM 'Diego Gonzalez' via blink-dev <
>>>>>>>>>>> blin...@chromium.org> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Contact emails 
>>>>>>>>>>>>
>>>>>>>>>>>> amb...@microsoft.com, luig...@microsoft.com, 
>>>>>>>>>>>> hat...@microsoft.com, c...@chromium.org
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Explainer 
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> https://github.com/WICG/window-controls-overlay/blob/master/explainer.md
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Specification 
>>>>>>>>>>>>
>>>>>>>>>>>> https://wicg.github.io/window-controls-overlay/ 
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> The spec looks like it could use some work. Beyond the 
>>>>>>>>>>> editorial, it doesn't seem like it defines the novel concepts that 
>>>>>>>>>>> it 
>>>>>>>>>>> introduces, nor the relevant processing models.
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Let me expand on that a bit. The spec introduces a new concept of 
>>>>>>>>>> a "window overlay" without really creating it as a concept. 
>>>>>>>>>> What I expect an interoperable spec to define the concept with as 
>>>>>>>>>> much detail as possible without getting OS- or 
>>>>>>>>>> implementation-specific. 
>>>>>>>>>> (Just to draw an example of what I have in mind, if I had to make 
>>>>>>>>>> something up, I'd go with something like: "<dfn>Window overlay</dfn> 
>>>>>>>>>> is an 
>>>>>>>>>> interface element that the operating system uses consistently across 
>>>>>>>>>> applications to enable the user to perform certain action to control 
>>>>>>>>>> the 
>>>>>>>>>> application such as closing it, expanding it to full screen, etc. 
>>>>>>>>>> This UI 
>>>>>>>>>> element takes fixed dimensions....")
>>>>>>>>>>
>>>>>>>>>> Then, once you have that concept defined, you can start building 
>>>>>>>>>> on it and define the processing of the different methods based on 
>>>>>>>>>> that.
>>>>>>>>>>
>>>>>>>>>> I'll open issues with other suggestions.
>>>>>>>>>>
>>>>>>>>>>  
>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Design docs 
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> https://github.com/WICG/window-controls-overlay/blob/main/explainer.md
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Summary 
>>>>>>>>>>>>
>>>>>>>>>>>> Window Controls Overlay allows a developer to create a custom 
>>>>>>>>>>>> title bar UX by extending the installed app’s client area. The 
>>>>>>>>>>>> client area 
>>>>>>>>>>>> now covers the entire window except for the window controls 
>>>>>>>>>>>> (close, 
>>>>>>>>>>>> maximize/restore, minimize), which are overlaid in their 
>>>>>>>>>>>> respective 
>>>>>>>>>>>> position. 
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>> The web app developer is responsible for drawing and 
>>>>>>>>>>>> input-handling for the entire window except for the window 
>>>>>>>>>>>> controls 
>>>>>>>>>>>> overlay. This includes defining which area of the window is 
>>>>>>>>>>>> draggable as well, with a prefixed and non-prefixed version of a 
>>>>>>>>>>>> css 
>>>>>>>>>>>> property supported, as implemented in: crrev.com/c/3094474.
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>> Intended uses for the Window Controls Overlay are creating 
>>>>>>>>>>>> seamless UX that can use the area that was reserved for the title 
>>>>>>>>>>>> bar 
>>>>>>>>>>>> before. Many modern applications include menus, search bars and 
>>>>>>>>>>>> other 
>>>>>>>>>>>> controls in the title bar, and this feature enables this on 
>>>>>>>>>>>> installed web 
>>>>>>>>>>>> apps.
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Blink component 
>>>>>>>>>>>>
>>>>>>>>>>>> UI>Browser>WebAppInstalls 
>>>>>>>>>>>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:UI%3EBrowser%3EWebAppInstalls>
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Search tags 
>>>>>>>>>>>>
>>>>>>>>>>>> PWA <https://chromestatus.com/features#tags:PWA>, web app 
>>>>>>>>>>>> <https://chromestatus.com/features#tags:web%20app>, title bar 
>>>>>>>>>>>> <https://chromestatus.com/features#tags:title%20bar>, titlebar 
>>>>>>>>>>>> <https://chromestatus.com/features#tags:titlebar>, 
>>>>>>>>>>>> customization 
>>>>>>>>>>>> <https://chromestatus.com/features#tags:customization>, window 
>>>>>>>>>>>> controls 
>>>>>>>>>>>> <https://chromestatus.com/features#tags:window%20controls>
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> TAG review 
>>>>>>>>>>>>
>>>>>>>>>>>> https://github.com/w3ctag/design-reviews/issues/481
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> TAG review status 
>>>>>>>>>>>>
>>>>>>>>>>>> Resolution: satisfied
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Risks 
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Interoperability and Compatibility 
>>>>>>>>>>>>
>>>>>>>>>>>> Given that Edge has interest in the feature, there would be at 
>>>>>>>>>>>> least one other browser that implements it. The feature involves 
>>>>>>>>>>>> additive 
>>>>>>>>>>>> changes (new web app manifest entry, new JS API, new CSS env 
>>>>>>>>>>>> variables) and 
>>>>>>>>>>>> modifications (changes to frame, new use of 
>>>>>>>>>>>> env(safe-area-inset-*), but no 
>>>>>>>>>>>> removals, so the compatibility risk is minimal.
>>>>>>>>>>>>
>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>> Gecko: defer 
>>>>>>>>>>>> https://github.com/mozilla/standards-positions/issues/529 
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>> WebKit: No signal 
>>>>>>>>>>>> https://lists.webkit.org/pipermail/webkit-dev/2021-May/031865.html
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>> Web developers: Positive
>>>>>>>>>>>>
>>>>>>>>>>>> https://twitter.com/firt/status/1385238446046859268?s=20
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> https://twitter.com/AnaestheticsApp/status/1408727417330573314?s=20
>>>>>>>>>>>>
>>>>>>>>>>>> https://twitter.com/bashik7/status/1385821988208275457?s=20
>>>>>>>>>>>>
>>>>>>>>>>>> https://twitter.com/abraham/status/1385201046767738880?s=20
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Ergonomics 
>>>>>>>>>>>>
>>>>>>>>>>>> The changes associated with this feature will only be enabled 
>>>>>>>>>>>> for PWAs that opt-in to it, so there are minimal risks posed to 
>>>>>>>>>>>> the browser 
>>>>>>>>>>>> as a whole. A PWA that opts-in to the feature should also have 
>>>>>>>>>>>> minimal 
>>>>>>>>>>>> ergonomics risk since the manifest already needs to be parsed on 
>>>>>>>>>>>> startup to 
>>>>>>>>>>>> determine the correct display mode in which the app should be 
>>>>>>>>>>>> launched, so 
>>>>>>>>>>>> adding one extra manifest check on startup should have minimal 
>>>>>>>>>>>> impact.
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Activation 
>>>>>>>>>>>>
>>>>>>>>>>>> The activation risk is low since this feature includes all the 
>>>>>>>>>>>> tools needed to create an app that uses the full extent of the 
>>>>>>>>>>>> window: new 
>>>>>>>>>>>> UA-provided window controls overlay, JS APIs to query the size of 
>>>>>>>>>>>> the 
>>>>>>>>>>>> overlay, and CSS environment variables to layout content around 
>>>>>>>>>>>> the overlay.
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> What do we expect developers to do as a fallback in 
>>>>>>>>>>> non-supporting browsers?  
>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Security 
>>>>>>>>>>>>
>>>>>>>>>>>> The major risk is that giving sites partial control over the 
>>>>>>>>>>>> top of the app window allows developers to spoof content in what 
>>>>>>>>>>>> was 
>>>>>>>>>>>> previously a trusted, UA-controlled region. To minimize the risk 
>>>>>>>>>>>> of 
>>>>>>>>>>>> spoofing, the app will open by default in “standalone” mode with a 
>>>>>>>>>>>> full 
>>>>>>>>>>>> width title bar, and the user can toggle window controls overlay 
>>>>>>>>>>>> on and off 
>>>>>>>>>>>> via a button in the title bar/overlay.
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> OK, so both the app *and* the user need to opt-in? 
>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Debuggability 
>>>>>>>>>>>>
>>>>>>>>>>>> The feature itself can be easily debugged by installing the 
>>>>>>>>>>>> PWA. Since it is a visual feature on the window itself, it is easy 
>>>>>>>>>>>> to test. 
>>>>>>>>>>>> Nonetheless, making sure parsing the “display-override” mode and 
>>>>>>>>>>>> associated 
>>>>>>>>>>>> values correctly is desired, which should be incorporated into the 
>>>>>>>>>>>> application tab of devtools, where all the other manifest warnings 
>>>>>>>>>>>> are 
>>>>>>>>>>>> displayed. 
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Is this feature fully tested by web-platform-tests 
>>>>>>>>>>>> <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md>
>>>>>>>>>>>> ? 
>>>>>>>>>>>>
>>>>>>>>>>>> 3170531: dpwas: WPT Tests for window-controls-overlay | 
>>>>>>>>>>>> https://chromium-review.googlesource.com/c/chromium/src/+/3170531
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Flag name 
>>>>>>>>>>>>
>>>>>>>>>>>> #enable-desktop-pwas-window-controls-overlay
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Requires code in //chrome? 
>>>>>>>>>>>>
>>>>>>>>>>>> False
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Tracking bug 
>>>>>>>>>>>>
>>>>>>>>>>>> https://bugs.chromium.org/p/chromium/issues/detail?id=937121
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Launch bug 
>>>>>>>>>>>>
>>>>>>>>>>>> https://crbug.com/1108107
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Sample links 
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>> https://amandabaker.github.io/pwa/explainer-example/index.html
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Estimated milestones 
>>>>>>>>>>>>
>>>>>>>>>>>> OriginTrial desktop last
>>>>>>>>>>>>
>>>>>>>>>>>> 96
>>>>>>>>>>>>
>>>>>>>>>>>> OriginTrial desktop first
>>>>>>>>>>>>
>>>>>>>>>>>> 93
>>>>>>>>>>>>
>>>>>>>>>>>> Expected Release
>>>>>>>>>>>>
>>>>>>>>>>>> 97
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Link to entry on the Chrome Platform Status 
>>>>>>>>>>>>
>>>>>>>>>>>> https://chromestatus.com/feature/5741247866077184
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>> Links to previous Intent discussions 
>>>>>>>>>>>>
>>>>>>>>>>>> Intent to prototype: 
>>>>>>>>>>>> https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/cper6nNLFRQ/hU91kfCWBQAJ
>>>>>>>>>>>>
>>>>>>>>>>>> Intent to Experiment: 
>>>>>>>>>>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/HNHbpxvrECA/m/JJoXKQI3BAAJ
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>> This intent message was generated by Chrome Platform Status 
>>>>>>>>>>>> <https://www.chromestatus.com/>.
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>> Regards,
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>> *Diego González-Zúñiga*
>>>>>>>>>>>>
>>>>>>>>>>>> PM, Microsoft Edge
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>>  
>>>>>>>>>>>>
>>>>>>>>>>>> -- 
>>>>>>>>>>>> You received this message because you are subscribed to the 
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>>>>>>>>>>>>
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>>>>>>>>>>>
>>>>>>>>>>>> To view this discussion on the web visit 
>>>>>>>>>>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/VI1PR83MB041666BD26451656C388347CCCBE9%40VI1PR83MB0416.EURPRD83.prod.outlook.com
>>>>>>>>>>>>  
>>>>>>>>>>>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/VI1PR83MB041666BD26451656C388347CCCBE9%40VI1PR83MB0416.EURPRD83.prod.outlook.com?utm_medium=email&utm_source=footer>
>>>>>>>>>>>> .
>>>>>>>>>>>>
>>>>>>>>>>>

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