feat(theme): Branded theming via brand_yml

CHANGELOG.md

@@ -31,6 +31,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * `chat_ui()` and `Chat.ui()` gain a `messages` parameter for providing starting messages. (#1736)
 
+* Shiny now supports theming via [brand.yml](https://posit-dev.github.io/brand-yml) with a single `_brand.yml` file. Call `ui.Theme.from_brand()` with `__file__` or the path to a `_brand.yml` file and pass the resulting theme to the `theme` argument of `express.ui.page_opts()` (Shiny Express) or `ui.page_*()` functions (Shiny Core) to apply the brand theme to the entire app. (#1743)
+
 ### Other changes
 
 * Incorporated `orjson` for faster data serialization in `@render.data_frame` outputs. (#1570)

docs/_quarto.yml

@@ -44,3 +44,6 @@ interlinks:
       url: https://matplotlib.org/stable/
     python:
       url: https://docs.python.org/3/
+    brand-yml:
+      url: https://posit-dev.github.io/brand-yml/
+      inv: objects.txt

examples/brand/Monda-OFL.txt

@@ -0,0 +1,93 @@
+Copyright 2021 The Monda Project Authors (https://github.com/googlefonts/mondaFont)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+https://openfontlicense.org
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

examples/brand/_brand.yml

@@ -0,0 +1,115 @@
+meta:
+  name:
+    full: "Retro Arcade Brand"
+    short: "RetroArc"
+  link:
+    home: https://retroarc.example.com
+    mastodon: https://mastodon.social/@retroarc
+    github: https://github.com/retroarc
+    linkedin: https://linkedin.com/company/retroarc
+    twitter: https://twitter.com/retroarc
+    facebook: https://facebook.com/retroarc
+
+# logo:
+#   images:
+#     icon-light: logos/retroarc-icon-light.png
+#     icon-dark: logos/retroarc-icon-dark.png
+#     wide-light: logos/retroarc-wide-light.png
+#     wide-dark: logos/retroarc-wide-dark.png
+#     tall-light: logos/retroarc-tall-light.png
+#     tall-dark: logos/retroarc-tall-dark.png
+#   small:
+#     light: logos/retroarc-icon-light.png
+#     dark: logos/retroarc-icon-dark.png
+#   medium:
+#     light: logos/retroarc-wide-light.png
+#     dark: logos/retroarc-wide-dark.png
+#   large:
+#     light: logos/retroarc-tall-light.png
+#     dark: logos/retroarc-tall-dark.png
+
+color:
+  palette:
+    pink: "#E83E8C"
+    blue: "#007BFF"
+    cyan: "#17A2B8"
+    teal: "#20C997"
+    green: "#28A745"
+    yellow: "#FFD700"
+    orange: "#FF7F50"
+    red: "#FF3333"
+    purple: "#6F42C1"
+    indigo: "#6610F2"
+    black: "#1A1A1A"
+    white: "#F8F8F8"
+  foreground: black
+  background: white
+  primary: purple
+  success: green
+  info: cyan
+  warning: yellow
+  danger: orange
+  light: white
+  dark: black
+
+typography:
+  fonts:
+    - family: Quantico
+      source: google
+      weight: [700]
+      style: [normal, italic]
+      display: swap
+    - family: Monda
+      source: file
+      files:
+        - path: Monda.ttf
+          weight: 400..700
+    - family: Share Tech Mono
+      source: bunny
+      weight: 400
+      style: normal
+      display: swap
+  base:
+    family: Monda
+    size: 17px
+    weight: 400
+    line-height: 1.5
+  headings:
+    family: Quantico
+    weight: 400
+    line-height: 1.2
+    style: normal
+  monospace:
+    family: Share Tech Mono
+    size: 0.9em
+    weight: 400
+  monospace-inline:
+    family: Share Tech Mono
+    # size: 0.9em
+    weight: 400
+    color: yellow
+    background-color: "#1a1a1add"
+  monospace-block:
+    family: Share Tech Mono
+    size: 1.1em
+    weight: 400
+    color: green
+    background-color: black
+    line-height: 1.4
+  link:
+    weight: 400
+    background-color: purple
+    color: white
+    decoration: "underline"
+
+defaults:
+  bootstrap:
+    defaults:
+      my-pink: "$brand-pink"
+  shiny:
+    theme:
+      preset: shiny
+      rules: |
+        .navbar-brand { color: $my-pink }
+      # TODO: Find an appropriate theme variable to set
+      # navbar-bg: $brand-purple

examples/brand/_colors.scss

@@ -0,0 +1,116 @@
+// https://github.com/twbs/bootstrap/blob/v5.3.3/site/assets/scss/_colors.scss
+
+.bd-blue-100 { color: color-contrast($blue-100); background-color: $blue-100; }
+.bd-blue-200 { color: color-contrast($blue-200); background-color: $blue-200; }
+.bd-blue-300 { color: color-contrast($blue-300); background-color: $blue-300; }
+.bd-blue-400 { color: color-contrast($blue-400); background-color: $blue-400; }
+.bd-blue-500 { color: color-contrast($blue-500); background-color: $blue-500; }
+.bd-blue-600 { color: color-contrast($blue-600); background-color: $blue-600; }
+.bd-blue-700 { color: color-contrast($blue-700); background-color: $blue-700; }
+.bd-blue-800 { color: color-contrast($blue-800); background-color: $blue-800; }
+.bd-blue-900 { color: color-contrast($blue-900); background-color: $blue-900; }
+
+.bd-indigo-100 { color: color-contrast($indigo-100); background-color: $indigo-100; }
+.bd-indigo-200 { color: color-contrast($indigo-200); background-color: $indigo-200; }
+.bd-indigo-300 { color: color-contrast($indigo-300); background-color: $indigo-300; }
+.bd-indigo-400 { color: color-contrast($indigo-400); background-color: $indigo-400; }
+.bd-indigo-500 { color: color-contrast($indigo-500); background-color: $indigo-500; }
+.bd-indigo-600 { color: color-contrast($indigo-600); background-color: $indigo-600; }
+.bd-indigo-700 { color: color-contrast($indigo-700); background-color: $indigo-700; }
+.bd-indigo-800 { color: color-contrast($indigo-800); background-color: $indigo-800; }
+.bd-indigo-900 { color: color-contrast($indigo-900); background-color: $indigo-900; }
+
+.bd-purple-100 { color: color-contrast($purple-100); background-color: $purple-100; }
+.bd-purple-200 { color: color-contrast($purple-200); background-color: $purple-200; }
+.bd-purple-300 { color: color-contrast($purple-300); background-color: $purple-300; }
+.bd-purple-400 { color: color-contrast($purple-400); background-color: $purple-400; }
+.bd-purple-500 { color: color-contrast($purple-500); background-color: $purple-500; }
+.bd-purple-600 { color: color-contrast($purple-600); background-color: $purple-600; }
+.bd-purple-700 { color: color-contrast($purple-700); background-color: $purple-700; }
+.bd-purple-800 { color: color-contrast($purple-800); background-color: $purple-800; }
+.bd-purple-900 { color: color-contrast($purple-900); background-color: $purple-900; }
+
+.bd-pink-100 { color: color-contrast($pink-100); background-color: $pink-100; }
+.bd-pink-200 { color: color-contrast($pink-200); background-color: $pink-200; }
+.bd-pink-300 { color: color-contrast($pink-300); background-color: $pink-300; }
+.bd-pink-400 { color: color-contrast($pink-400); background-color: $pink-400; }
+.bd-pink-500 { color: color-contrast($pink-500); background-color: $pink-500; }
+.bd-pink-600 { color: color-contrast($pink-600); background-color: $pink-600; }
+.bd-pink-700 { color: color-contrast($pink-700); background-color: $pink-700; }
+.bd-pink-800 { color: color-contrast($pink-800); background-color: $pink-800; }
+.bd-pink-900 { color: color-contrast($pink-900); background-color: $pink-900; }
+
+.bd-red-100 { color: color-contrast($red-100); background-color: $red-100; }
+.bd-red-200 { color: color-contrast($red-200); background-color: $red-200; }
+.bd-red-300 { color: color-contrast($red-300); background-color: $red-300; }
+.bd-red-400 { color: color-contrast($red-400); background-color: $red-400; }
+.bd-red-500 { color: color-contrast($red-500); background-color: $red-500; }
+.bd-red-600 { color: color-contrast($red-600); background-color: $red-600; }
+.bd-red-700 { color: color-contrast($red-700); background-color: $red-700; }
+.bd-red-800 { color: color-contrast($red-800); background-color: $red-800; }
+.bd-red-900 { color: color-contrast($red-900); background-color: $red-900; }
+
+.bd-orange-100 { color: color-contrast($orange-100); background-color: $orange-100; }
+.bd-orange-200 { color: color-contrast($orange-200); background-color: $orange-200; }
+.bd-orange-300 { color: color-contrast($orange-300); background-color: $orange-300; }
+.bd-orange-400 { color: color-contrast($orange-400); background-color: $orange-400; }
+.bd-orange-500 { color: color-contrast($orange-500); background-color: $orange-500; }
+.bd-orange-600 { color: color-contrast($orange-600); background-color: $orange-600; }
+.bd-orange-700 { color: color-contrast($orange-700); background-color: $orange-700; }
+.bd-orange-800 { color: color-contrast($orange-800); background-color: $orange-800; }
+.bd-orange-900 { color: color-contrast($orange-900); background-color: $orange-900; }
+
+.bd-yellow-100 { color: color-contrast($yellow-100); background-color: $yellow-100; }
+.bd-yellow-200 { color: color-contrast($yellow-200); background-color: $yellow-200; }
+.bd-yellow-300 { color: color-contrast($yellow-300); background-color: $yellow-300; }
+.bd-yellow-400 { color: color-contrast($yellow-400); background-color: $yellow-400; }
+.bd-yellow-500 { color: color-contrast($yellow-500); background-color: $yellow-500; }
+.bd-yellow-600 { color: color-contrast($yellow-600); background-color: $yellow-600; }
+.bd-yellow-700 { color: color-contrast($yellow-700); background-color: $yellow-700; }
+.bd-yellow-800 { color: color-contrast($yellow-800); background-color: $yellow-800; }
+.bd-yellow-900 { color: color-contrast($yellow-900); background-color: $yellow-900; }
+
+.bd-green-100 { color: color-contrast($green-100); background-color: $green-100; }
+.bd-green-200 { color: color-contrast($green-200); background-color: $green-200; }
+.bd-green-300 { color: color-contrast($green-300); background-color: $green-300; }
+.bd-green-400 { color: color-contrast($green-400); background-color: $green-400; }
+.bd-green-500 { color: color-contrast($green-500); background-color: $green-500; }
+.bd-green-600 { color: color-contrast($green-600); background-color: $green-600; }
+.bd-green-700 { color: color-contrast($green-700); background-color: $green-700; }
+.bd-green-800 { color: color-contrast($green-800); background-color: $green-800; }
+.bd-green-900 { color: color-contrast($green-900); background-color: $green-900; }
+
+.bd-teal-100 { color: color-contrast($teal-100); background-color: $teal-100; }
+.bd-teal-200 { color: color-contrast($teal-200); background-color: $teal-200; }
+.bd-teal-300 { color: color-contrast($teal-300); background-color: $teal-300; }
+.bd-teal-400 { color: color-contrast($teal-400); background-color: $teal-400; }
+.bd-teal-500 { color: color-contrast($teal-500); background-color: $teal-500; }
+.bd-teal-600 { color: color-contrast($teal-600); background-color: $teal-600; }
+.bd-teal-700 { color: color-contrast($teal-700); background-color: $teal-700; }
+.bd-teal-800 { color: color-contrast($teal-800); background-color: $teal-800; }
+.bd-teal-900 { color: color-contrast($teal-900); background-color: $teal-900; }
+
+.bd-cyan-100 { color: color-contrast($cyan-100); background-color: $cyan-100; }
+.bd-cyan-200 { color: color-contrast($cyan-200); background-color: $cyan-200; }
+.bd-cyan-300 { color: color-contrast($cyan-300); background-color: $cyan-300; }
+.bd-cyan-400 { color: color-contrast($cyan-400); background-color: $cyan-400; }
+.bd-cyan-500 { color: color-contrast($cyan-500); background-color: $cyan-500; }
+.bd-cyan-600 { color: color-contrast($cyan-600); background-color: $cyan-600; }
+.bd-cyan-700 { color: color-contrast($cyan-700); background-color: $cyan-700; }
+.bd-cyan-800 { color: color-contrast($cyan-800); background-color: $cyan-800; }
+.bd-cyan-900 { color: color-contrast($cyan-900); background-color: $cyan-900; }
+
+.bd-gray-100 { color: color-contrast($gray-100); background-color: $gray-100; }
+.bd-gray-200 { color: color-contrast($gray-200); background-color: $gray-200; }
+.bd-gray-300 { color: color-contrast($gray-300); background-color: $gray-300; }
+.bd-gray-400 { color: color-contrast($gray-400); background-color: $gray-400; }
+.bd-gray-500 { color: color-contrast($gray-500); background-color: $gray-500; }
+.bd-gray-600 { color: color-contrast($gray-600); background-color: $gray-600; }
+.bd-gray-700 { color: color-contrast($gray-700); background-color: $gray-700; }
+.bd-gray-800 { color: color-contrast($gray-800); background-color: $gray-800; }
+.bd-gray-900 { color: color-contrast($gray-900); background-color: $gray-900; }
+
+.bd-white { color: color-contrast($white); background-color: $white; border: 2px solid $body-color;}
+.bd-black { color: color-contrast($black); background-color: $black; }
+.bd-foreground { color: $body-bg; background-color: $body-color; }
+.bd-background { color: $body-color; background-color: $body-bg; border: 2px solid $body-color;}

examples/brand/app-express.py

@@ -0,0 +1,10 @@
+from shiny.express import input, render, ui
+
+ui.page_opts(theme=ui.Theme.from_brand(__file__))
+
+ui.input_slider("n", "N", 0, 100, 20)
+
+
+@render.code
+def txt():
+    return f"n*2 is {input.n() * 2}"