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rustbot has assigned @GuillaumeGomez. Use |
Some changes occurred in HTML/CSS/JS. cc @GuillaumeGomez, @jsha Some changes occurred in GUI tests. |
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Can you host a page with this change please? |
I'm also not a big fan. What about no gradient, just plain dots? Also: I like how gimp implemented it, but it requires to have a right border, not sure if it's a good idea or not... |
Three dots stacked like that is an ellipses, and could be misinterpreted as a menu button.
I would like to avoid using unsubtle Aqua/Aero-ish gradients. They look out of place in Rustdoc, and there's plenty of good cel shading examples to pull from instead. A radial gradient isn't a bad idea, though. Maybe something like this? |
The problem I have with the cell shading version is it leads to some pretty bad aliasing on low-resolution screens. part of why i'm tempted to use a text-based solution is because text rendering is already optimized for looking good at low resolutions. we would of course need to put in a bit of effort to make sure it doesn't mess too much with screen readers. |
I can usually address pixel aliasing by making it lower contrast and also making it bigger. It's important to do both, otherwise things get hard to see. I don't like making it much bigger, because this feature isn't important enough to make it so prominent, but I could make it bigger without actually making it bigger if I just went with the NeXT/OSX approach and called it good. I could use one spot instead of four.
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Yes, that's a good idea. |
Renders a bit weird in dark mode: But otherwise I see this as a pure improvement over the current situation. So let's approve it and we can always improve the handle look later on. Thanks! @bors r+ rollup |
…uillaumeGomez rustdoc: add a handle that makes sidebar resizing more obvious This aims to make the resizable sidebars more obvious Preview: <https://notriddle.com/rustdoc-html-demo-12/sidebar-resize-handle/std/index.html>  This change is based on some discussion on [lolbinarycat's idea], but with a more "traditional" design. Specifically, while very few systems use exactly this design, most of them use [a skeumorph of "grip notching"](https://ux.stackexchange.com/questions/80463/what-do-the-3-close-horizontal-bars-not-hamburger-menu-represent-and-what-is-t/80591#80591): - In Jira, resizable sidebars have a stack of four dots. <details><img src="https://github.com/user-attachments/assets/13047998-02bf-47e6-b796-16f393f870b0"></details> - In The GIMP, resizable sidebars have a stack of three dots. <details><img src="https://github.com/user-attachments/assets/138f5c21-3069-4bbe-b306-0bb9a4bf0318"></details> - In [old Windows], "panes" are defined to have the same border style as a window, which has a raised appearance. To evoke this, the PR adds a lightweight "shadow" border, darker than the sidebar itself <details><img src="https://github.com/user-attachments/assets/301da4b8-6c48-4131-b741-1689af84670a"></details> - In [NeXT], a drag point usually had an innie, whether the line in a slider or the circle in a scroller; I can also hide and show the favorites bar in Workspace by dragging on a circular "grip spot" <details><img src="https://github.com/user-attachments/assets/b13c2d30-a3a8-4672-90fa-58c1fdf19f42"></details> - In [old Mac], drag handles for things usually had a "grip track" of parallel lines. <details><img src="https://github.com/user-attachments/assets/1fbecc67-ffbc-4ed6-a8c5-a9ff085638db"></details> *This design is far closer to old Mac than anything else*, though they've put it in the bottom corner instead of the middle. - [OSX] kept that, but the "Source List" part of the Finder still had the circle grip for a time the same way Workspace did (resulting in an odd mishmash, if you compare the source list sidebar with the other grip tracks embedded in the scrollbars). <details><img src="https://github.com/user-attachments/assets/551b8f9d-2dd8-4291-917f-dc88741a2b97"></details> [lolbinarycat's idea]: rust-lang#139420 [old Windows]: https://archive.org/details/windowsinterface00micr/page/n9/mode/2up [old Mac]: https://archive.org/details/apple-hig/1996_Human_Interface_Guidelines_for_Mac_OS_8_%28WWDC_Release%29/page/16/mode/2up [NeXT]: https://archive.org/details/apple-hig/1993%20NeXTSTEP%20User%20Interface%20Guidelines%20-%20Release%203/page/145/mode/2up [OSX]: https://dn721903.ca.archive.org/0/items/apple-hig/MacOSX_HIG_2005_09_08.pdf#page=267
…uillaumeGomez rustdoc: add a handle that makes sidebar resizing more obvious This aims to make the resizable sidebars more obvious Preview: <https://notriddle.com/rustdoc-html-demo-12/sidebar-resize-handle/std/index.html>  This change is based on some discussion on [lolbinarycat's idea], but with a more "traditional" design. Specifically, while very few systems use exactly this design, most of them use [a skeumorph of "grip notching"](https://ux.stackexchange.com/questions/80463/what-do-the-3-close-horizontal-bars-not-hamburger-menu-represent-and-what-is-t/80591#80591): - In Jira, resizable sidebars have a stack of four dots. <details><img src="https://github.com/user-attachments/assets/13047998-02bf-47e6-b796-16f393f870b0"></details> - In The GIMP, resizable sidebars have a stack of three dots. <details><img src="https://github.com/user-attachments/assets/138f5c21-3069-4bbe-b306-0bb9a4bf0318"></details> - In [old Windows], "panes" are defined to have the same border style as a window, which has a raised appearance. To evoke this, the PR adds a lightweight "shadow" border, darker than the sidebar itself <details><img src="https://github.com/user-attachments/assets/301da4b8-6c48-4131-b741-1689af84670a"></details> - In [NeXT], a drag point usually had an innie, whether the line in a slider or the circle in a scroller; I can also hide and show the favorites bar in Workspace by dragging on a circular "grip spot" <details><img src="https://github.com/user-attachments/assets/b13c2d30-a3a8-4672-90fa-58c1fdf19f42"></details> - In [old Mac], drag handles for things usually had a "grip track" of parallel lines. <details><img src="https://github.com/user-attachments/assets/1fbecc67-ffbc-4ed6-a8c5-a9ff085638db"></details> *This design is far closer to old Mac than anything else*, though they've put it in the bottom corner instead of the middle. - [OSX] kept that, but the "Source List" part of the Finder still had the circle grip for a time the same way Workspace did (resulting in an odd mishmash, if you compare the source list sidebar with the other grip tracks embedded in the scrollbars). <details><img src="https://github.com/user-attachments/assets/551b8f9d-2dd8-4291-917f-dc88741a2b97"></details> [lolbinarycat's idea]: rust-lang#139420 [old Windows]: https://archive.org/details/windowsinterface00micr/page/n9/mode/2up [old Mac]: https://archive.org/details/apple-hig/1996_Human_Interface_Guidelines_for_Mac_OS_8_%28WWDC_Release%29/page/16/mode/2up [NeXT]: https://archive.org/details/apple-hig/1993%20NeXTSTEP%20User%20Interface%20Guidelines%20-%20Release%203/page/145/mode/2up [OSX]: https://dn721903.ca.archive.org/0/items/apple-hig/MacOSX_HIG_2005_09_08.pdf#page=267
Oh indeed. Like this one the best! |
Then please use this one, add some screenshots and then r=me. I'd really like this improvement to be merged. :) @bors r- |
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This change is based on some discussion on [lolbinarycat's idea], but with a more "traditional" design. Specifically, this is the closest thing I could find to a consensus across many systems I looked at for inspiration: - In Jira, resizable sidebars have a stack of four dots. - In The GIMP, resizable sidebars have a stack of three dots. - In [old Windows], "panes" are defined to have the same border style as a window, which has a raised appearance. - In [NeXT], a drag point usually had an innie, whether the line in a slider or the circle in a scroller; I can also hide and show the favorites bar in Workspace by dragging on a circular "grip spot" - In [old Mac], drag handles for things usually had a "grip track" of parallel lines. - [OSX] kept that, but the "Source List" part of the Finder still had the circle grip for a time the same way Workspace did [lolbinarycat's idea]: rust-lang#139420 [old Windows]: https://archive.org/details/windowsinterface00micr/page/n9/mode/2up [old Mac]: https://archive.org/details/apple-hig/1996_Human_Interface_Guidelines_for_Mac_OS_8_%28WWDC_Release%29/page/16/mode/2up [NeXT]: https://archive.org/details/apple-hig/1993%20NeXTSTEP%20User%20Interface%20Guidelines%20-%20Release%203/page/145/mode/2up [OSX]: https://dn721903.ca.archive.org/0/items/apple-hig/MacOSX_HIG_2005_09_08.pdf#page=267
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@bors r=GuillaumeGomez |
…uillaumeGomez rustdoc: add a handle that makes sidebar resizing more obvious This aims to make the resizable sidebars more obvious Preview: <https://notriddle.com/rustdoc-html-demo-12/sidebar-resize-handle/std/index.html>    This change is based on some discussion on [lolbinarycat's idea], but with a more "traditional" design. Specifically, while very few systems use exactly this design, most of them use [a skeumorph](https://ux.stackexchange.com/questions/80463/what-do-the-3-close-horizontal-bars-not-hamburger-menu-represent-and-what-is-t/80591#80591) of a grip texture: - This design is similar to the one used in the Rust Playground, and almost identical to UX StackExchange: <details><img src="https://github.com/user-attachments/assets/39a6bb69-4895-4fd0-87da-b87913bc7309"></details> <details><img src="https://github.com/user-attachments/assets/a41942e1-651b-410b-b855-2aafe8fe54f4"></details> - In Jira, resizable sidebars have a stack of four dots, but only in one row. <details><img src="https://github.com/user-attachments/assets/13047998-02bf-47e6-b796-16f393f870b0"></details> - In The GIMP, resizable sidebars have a stack of three dots. <details><img src="https://github.com/user-attachments/assets/138f5c21-3069-4bbe-b306-0bb9a4bf0318"></details> - In [old Windows], "panes" are defined to have the same border style as a window, which has a raised appearance. To evoke this, the PR adds a lightweight "shadow" border, darker than the sidebar itself <details><img src="https://github.com/user-attachments/assets/301da4b8-6c48-4131-b741-1689af84670a"></details> - In [NeXT], a drag point usually had an innie, whether the line in a slider or the circle in a scroller; I can also hide and show the favorites bar in Workspace by dragging on a circular "grip spot" <details><img src="https://github.com/user-attachments/assets/b13c2d30-a3a8-4672-90fa-58c1fdf19f42"></details> - In [old Mac], drag handles for things usually had a "grip track" of parallel lines. <details><img src="https://github.com/user-attachments/assets/1fbecc67-ffbc-4ed6-a8c5-a9ff085638db"></details> *This design is far closer to old Mac than anything else*, though they've put it in the bottom corner instead of the middle. - [OSX] kept that, but the "Source List" part of the Finder still had the circle grip for a time the same way Workspace did (resulting in an odd mishmash, if you compare the source list sidebar with the other grip tracks embedded in the scrollbars). <details><img src="https://github.com/user-attachments/assets/551b8f9d-2dd8-4291-917f-dc88741a2b97"></details> [lolbinarycat's idea]: rust-lang#139420 [old Windows]: https://archive.org/details/windowsinterface00micr/page/n9/mode/2up [old Mac]: https://archive.org/details/apple-hig/1996_Human_Interface_Guidelines_for_Mac_OS_8_%28WWDC_Release%29/page/16/mode/2up [NeXT]: https://archive.org/details/apple-hig/1993%20NeXTSTEP%20User%20Interface%20Guidelines%20-%20Release%203/page/145/mode/2up [OSX]: https://dn721903.ca.archive.org/0/items/apple-hig/MacOSX_HIG_2005_09_08.pdf#page=267
…uillaumeGomez rustdoc: add a handle that makes sidebar resizing more obvious This aims to make the resizable sidebars more obvious Preview: <https://notriddle.com/rustdoc-html-demo-12/sidebar-resize-handle/std/index.html>    This change is based on some discussion on [lolbinarycat's idea], but with a more "traditional" design. Specifically, while very few systems use exactly this design, most of them use [a skeumorph](https://ux.stackexchange.com/questions/80463/what-do-the-3-close-horizontal-bars-not-hamburger-menu-represent-and-what-is-t/80591#80591) of a grip texture: - This design is similar to the one used in the Rust Playground, and almost identical to UX StackExchange: <details><img src="https://github.com/user-attachments/assets/39a6bb69-4895-4fd0-87da-b87913bc7309"></details> <details><img src="https://github.com/user-attachments/assets/a41942e1-651b-410b-b855-2aafe8fe54f4"></details> - In Jira, resizable sidebars have a stack of four dots, but only in one row. <details><img src="https://github.com/user-attachments/assets/13047998-02bf-47e6-b796-16f393f870b0"></details> - In The GIMP, resizable sidebars have a stack of three dots. <details><img src="https://github.com/user-attachments/assets/138f5c21-3069-4bbe-b306-0bb9a4bf0318"></details> - In [old Windows], "panes" are defined to have the same border style as a window, which has a raised appearance. To evoke this, the PR adds a lightweight "shadow" border, darker than the sidebar itself <details><img src="https://github.com/user-attachments/assets/301da4b8-6c48-4131-b741-1689af84670a"></details> - In [NeXT], a drag point usually had an innie, whether the line in a slider or the circle in a scroller; I can also hide and show the favorites bar in Workspace by dragging on a circular "grip spot" <details><img src="https://github.com/user-attachments/assets/b13c2d30-a3a8-4672-90fa-58c1fdf19f42"></details> - In [old Mac], drag handles for things usually had a "grip track" of parallel lines. <details><img src="https://github.com/user-attachments/assets/1fbecc67-ffbc-4ed6-a8c5-a9ff085638db"></details> *This design is far closer to old Mac than anything else*, though they've put it in the bottom corner instead of the middle. - [OSX] kept that, but the "Source List" part of the Finder still had the circle grip for a time the same way Workspace did (resulting in an odd mishmash, if you compare the source list sidebar with the other grip tracks embedded in the scrollbars). <details><img src="https://github.com/user-attachments/assets/551b8f9d-2dd8-4291-917f-dc88741a2b97"></details> [lolbinarycat's idea]: rust-lang#139420 [old Windows]: https://archive.org/details/windowsinterface00micr/page/n9/mode/2up [old Mac]: https://archive.org/details/apple-hig/1996_Human_Interface_Guidelines_for_Mac_OS_8_%28WWDC_Release%29/page/16/mode/2up [NeXT]: https://archive.org/details/apple-hig/1993%20NeXTSTEP%20User%20Interface%20Guidelines%20-%20Release%203/page/145/mode/2up [OSX]: https://dn721903.ca.archive.org/0/items/apple-hig/MacOSX_HIG_2005_09_08.pdf#page=267
Rollup of 10 pull requests Successful merges: - rust-lang#129334 (Implement (part of) ACP 429: add `DerefMut` to `Lazy[Cell/Lock]`) - rust-lang#135015 (Partially stabilize LoongArch target features) - rust-lang#138736 (Sanitizers target modificators) - rust-lang#139562 (rustdoc: add a handle that makes sidebar resizing more obvious) - rust-lang#140151 (remove intrinsics::drop_in_place) - rust-lang#140660 (remove 'unordered' atomic intrinsics) - rust-lang#140783 (Update documentation of OnceLock::get_or_init.) - rust-lang#140789 (Update hermit-abi to 0.5.1) - rust-lang#140792 (Use intrinsics for `{f16,f32,f64,f128}::{minimum,maximum}` operations) - rust-lang#140862 (Enable non-leaf Frame Pointers for Arm64EC Windows) r? `@ghost` `@rustbot` modify labels: rollup
…uillaumeGomez rustdoc: add a handle that makes sidebar resizing more obvious This aims to make the resizable sidebars more obvious Preview: <https://notriddle.com/rustdoc-html-demo-12/sidebar-resize-handle/std/index.html>    This change is based on some discussion on [lolbinarycat's idea], but with a more "traditional" design. Specifically, while very few systems use exactly this design, most of them use [a skeumorph](https://ux.stackexchange.com/questions/80463/what-do-the-3-close-horizontal-bars-not-hamburger-menu-represent-and-what-is-t/80591#80591) of a grip texture: - This design is similar to the one used in the Rust Playground, and almost identical to UX StackExchange: <details><img src="https://github.com/user-attachments/assets/39a6bb69-4895-4fd0-87da-b87913bc7309"></details> <details><img src="https://github.com/user-attachments/assets/a41942e1-651b-410b-b855-2aafe8fe54f4"></details> - In Jira, resizable sidebars have a stack of four dots, but only in one row. <details><img src="https://github.com/user-attachments/assets/13047998-02bf-47e6-b796-16f393f870b0"></details> - In The GIMP, resizable sidebars have a stack of three dots. <details><img src="https://github.com/user-attachments/assets/138f5c21-3069-4bbe-b306-0bb9a4bf0318"></details> - In [old Windows], "panes" are defined to have the same border style as a window, which has a raised appearance. To evoke this, the PR adds a lightweight "shadow" border, darker than the sidebar itself <details><img src="https://github.com/user-attachments/assets/301da4b8-6c48-4131-b741-1689af84670a"></details> - In [NeXT], a drag point usually had an innie, whether the line in a slider or the circle in a scroller; I can also hide and show the favorites bar in Workspace by dragging on a circular "grip spot" <details><img src="https://github.com/user-attachments/assets/b13c2d30-a3a8-4672-90fa-58c1fdf19f42"></details> - In [old Mac], drag handles for things usually had a "grip track" of parallel lines. <details><img src="https://github.com/user-attachments/assets/1fbecc67-ffbc-4ed6-a8c5-a9ff085638db"></details> *This design is far closer to old Mac than anything else*, though they've put it in the bottom corner instead of the middle. - [OSX] kept that, but the "Source List" part of the Finder still had the circle grip for a time the same way Workspace did (resulting in an odd mishmash, if you compare the source list sidebar with the other grip tracks embedded in the scrollbars). <details><img src="https://github.com/user-attachments/assets/551b8f9d-2dd8-4291-917f-dc88741a2b97"></details> [lolbinarycat's idea]: rust-lang#139420 [old Windows]: https://archive.org/details/windowsinterface00micr/page/n9/mode/2up [old Mac]: https://archive.org/details/apple-hig/1996_Human_Interface_Guidelines_for_Mac_OS_8_%28WWDC_Release%29/page/16/mode/2up [NeXT]: https://archive.org/details/apple-hig/1993%20NeXTSTEP%20User%20Interface%20Guidelines%20-%20Release%203/page/145/mode/2up [OSX]: https://dn721903.ca.archive.org/0/items/apple-hig/MacOSX_HIG_2005_09_08.pdf#page=267
…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#129334 (Implement (part of) ACP 429: add `DerefMut` to `Lazy[Cell/Lock]`) - rust-lang#139562 (rustdoc: add a handle that makes sidebar resizing more obvious) - rust-lang#140151 (remove intrinsics::drop_in_place) - rust-lang#140660 (remove 'unordered' atomic intrinsics) - rust-lang#140783 (Update documentation of OnceLock::get_or_init.) - rust-lang#140789 (Update hermit-abi to 0.5.1) - rust-lang#140792 (Use intrinsics for `{f16,f32,f64,f128}::{minimum,maximum}` operations) - rust-lang#140879 (1.87.0 release notes: remove nonsensical `~` operator) r? `@ghost` `@rustbot` modify labels: rollup
…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#129334 (Implement (part of) ACP 429: add `DerefMut` to `Lazy[Cell/Lock]`) - rust-lang#139562 (rustdoc: add a handle that makes sidebar resizing more obvious) - rust-lang#140151 (remove intrinsics::drop_in_place) - rust-lang#140660 (remove 'unordered' atomic intrinsics) - rust-lang#140783 (Update documentation of OnceLock::get_or_init.) - rust-lang#140789 (Update hermit-abi to 0.5.1) - rust-lang#140879 (1.87.0 release notes: remove nonsensical `~` operator) r? `@ghost` `@rustbot` modify labels: rollup
Rollup merge of rust-lang#139562 - notriddle:notriddle/ew-resize, r=GuillaumeGomez rustdoc: add a handle that makes sidebar resizing more obvious This aims to make the resizable sidebars more obvious Preview: <https://notriddle.com/rustdoc-html-demo-12/sidebar-resize-handle/std/index.html>    This change is based on some discussion on [lolbinarycat's idea], but with a more "traditional" design. Specifically, while very few systems use exactly this design, most of them use [a skeumorph](https://ux.stackexchange.com/questions/80463/what-do-the-3-close-horizontal-bars-not-hamburger-menu-represent-and-what-is-t/80591#80591) of a grip texture: - This design is similar to the one used in the Rust Playground, and almost identical to UX StackExchange: <details><img src="https://github.com/user-attachments/assets/39a6bb69-4895-4fd0-87da-b87913bc7309"></details> <details><img src="https://github.com/user-attachments/assets/a41942e1-651b-410b-b855-2aafe8fe54f4"></details> - In Jira, resizable sidebars have a stack of four dots, but only in one row. <details><img src="https://github.com/user-attachments/assets/13047998-02bf-47e6-b796-16f393f870b0"></details> - In The GIMP, resizable sidebars have a stack of three dots. <details><img src="https://github.com/user-attachments/assets/138f5c21-3069-4bbe-b306-0bb9a4bf0318"></details> - In [old Windows], "panes" are defined to have the same border style as a window, which has a raised appearance. To evoke this, the PR adds a lightweight "shadow" border, darker than the sidebar itself <details><img src="https://github.com/user-attachments/assets/301da4b8-6c48-4131-b741-1689af84670a"></details> - In [NeXT], a drag point usually had an innie, whether the line in a slider or the circle in a scroller; I can also hide and show the favorites bar in Workspace by dragging on a circular "grip spot" <details><img src="https://github.com/user-attachments/assets/b13c2d30-a3a8-4672-90fa-58c1fdf19f42"></details> - In [old Mac], drag handles for things usually had a "grip track" of parallel lines. <details><img src="https://github.com/user-attachments/assets/1fbecc67-ffbc-4ed6-a8c5-a9ff085638db"></details> *This design is far closer to old Mac than anything else*, though they've put it in the bottom corner instead of the middle. - [OSX] kept that, but the "Source List" part of the Finder still had the circle grip for a time the same way Workspace did (resulting in an odd mishmash, if you compare the source list sidebar with the other grip tracks embedded in the scrollbars). <details><img src="https://github.com/user-attachments/assets/551b8f9d-2dd8-4291-917f-dc88741a2b97"></details> [lolbinarycat's idea]: rust-lang#139420 [old Windows]: https://archive.org/details/windowsinterface00micr/page/n9/mode/2up [old Mac]: https://archive.org/details/apple-hig/1996_Human_Interface_Guidelines_for_Mac_OS_8_%28WWDC_Release%29/page/16/mode/2up [NeXT]: https://archive.org/details/apple-hig/1993%20NeXTSTEP%20User%20Interface%20Guidelines%20-%20Release%203/page/145/mode/2up [OSX]: https://dn721903.ca.archive.org/0/items/apple-hig/MacOSX_HIG_2005_09_08.pdf#page=267
This aims to make the resizable sidebars more obvious
Preview: https://notriddle.com/rustdoc-html-demo-12/sidebar-resize-handle/std/index.html
This change is based on some discussion on lolbinarycat's idea, but with a more "traditional" design. Specifically, while very few systems use exactly this design, most of them use a skeumorph of a grip texture:
This design is similar to the one used in the Rust Playground, and almost identical to UX StackExchange:
In Jira, resizable sidebars have a stack of four dots, but only in one row.
In The GIMP, resizable sidebars have a stack of three dots.
In old Windows, "panes" are defined to have the same border style as a window, which has a raised appearance. To evoke this, the PR adds a lightweight "shadow" border, darker than the sidebar itself
In NeXT, a drag point usually had an innie, whether the line in a slider or the circle in a scroller; I can also hide and show the favorites bar in Workspace by dragging on a circular "grip spot"
In old Mac, drag handles for things usually had a "grip track" of parallel lines.
This design is far closer to old Mac than anything else, though they've put it in the bottom corner instead of the middle.
OSX kept that, but the "Source List" part of the Finder still had the circle grip for a time the same way Workspace did (resulting in an odd mishmash, if you compare the source list sidebar with the other grip tracks embedded in the scrollbars).