fix(windows): fix aero-snap and resizing of borderless window, fixes #103 #104

[amrbashir]

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Documentation
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes. Issue #___
• No

The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix: #xxx[,#xxx], where "xxx" is the issue number)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:

[amrbashir]

If you have trouble seeing the borderless window, try changing this line

tao/src/platform_impl/windows/window.rs

Line 1008 in cbd4cdb

hbrBackground: ptr::null_mut(),

to hbrBackground: winuser::COLOR_WINDOW as _,

[Blakeinstein]

Any plans for implementing this as well? https://docs.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmextendframeintoclientarea

[amrbashir]

@Blakeinstein what's the use case for it? does the window not have shadows by default ?

[amrbashir]

@Blakeinstein just pushed a commit with shadows, test it and let me know what you think.

[Blakeinstein]

@Blakeinstein just pushed a commit with shadows, test it and let me know what you think.

Oh yea sorry I wasn't available yesterday. It works great!

So does the resize.

Can you test one thing for me? Resizing a frameless window had a delay on sending the resize event to the webview on boscop/webview. This results in white gaps being visible for a few seconds. Can you try this with tauri?

[Blakeinstein]

I don't know about cross-compatibility. But later down the road can we expose the margins as an api?

example: https://docs.microsoft.com/en-us/windows/win32/dwm/blur-ovw

[amrbashir]

I have plans to:

1. Provide API to set the shadows if possible on all platforms
2. Provide Blur/Acrylic/Vibrancy API

but all of that is out of this PR scope.

[Blakeinstein]

I have plans to:

1. Provide API to set the shadows if possible on all platforms

2. Provide Blur/Acrylic/Vibrancy API
   but all of that is out of this PR scope.

That sounds awesome! Thanks again!