bug(material/theming): get-contrast-color-from-palette doesn't work with pre-defined hue names
- 主要言語
- TypeScript
- スター
- 25k
- フォーク
- 6.8k
- 平均マージ
- 1日 8時間
- マージ済み PR(30日)
- 91
説明
### Is this a regression?
- [ ] Yes, this behavior used to work in the previous version
### The previous version in which this bug was not present was
_No response_
### Description
Using `get-contrast-color-from-palette` is convenient and explicit as it gives you the contrast color without having to add `-contrast` to the hue value. It seems to me as the right thing to choose, even though the theming documentation currently doesn't mention this function.
However the behavior can be confusing because hues such as `default`, `lighter` or `darker` are added only to the outer map, not the inner contrast map, when calling `define-palette`. Therefore you can only use it with hues that are defined in the contrast-palette from the beginning (such as 500).
There is an easy workaround but I also think that it should be fairly easy to add `default`, `lighter`, `darker` etc. to the inner contrast map in `mat.define-palette`.
### Reproduction
StackBlitz link: https://stackblitz.com/edit/components-issue-egs21k?file=src%2Fstyles.scss
Steps to reproduce:
1. Use `mat.get-contrast-color-from-palette` with a pre-defined hue value such as `default` or `lighter`
### Expected Behavior
I expect `mat.get-contrast-color-from-palette($palette, default)` to return the same color as `mat-get-color-from-palette($palette, default-contrast)` after defining a palette using `mat.define-palette`.
### Actual Behavior
`mat.get-contrast-color-from-palette` looks for a hue called `default` in the inner contrast map but that doesn't get added to the inner contrast map when calling `mat.define-palette`.
### Environment
- Angular: 16.2.6
- CDK/Material: 16.2.9
- Browser(s): Firefox
- Operating System (e.g. Windows, macOS, Ubuntu): Windows 11
コントリビューションガイド
調査の方向性
mat.define-palette と get-contrast-color-from-palette から始め、次に、デフォルトまたはより明るい色相を使って、提供されている StackBlitz の再現を実行します。コントラストの検索結果が、対応する default-contrast または lighter-contrast の値と同じ色を返し、影響を受ける動作がカバレッジで網羅されていれば完了です。
索引モデルが issue の本文から書いたものです。
評価
- 技術スタック
- angular, sass
- 領域
- design, frontend
- issue の種類
- バグ
- 難易度
- 3/5
- 見積もり時間
- 1〜2日
- 活発さ
- 停滞
- 明瞭さ
- おおむね明確
- 初心者へのやさしさ
- 45/100