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Reworked search documentation
This commit is contained in:
squidfunk
commit
5421abee16
@ -44,7 +44,7 @@ The following configuration options are supported:
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``` yaml
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plugins:
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- search:
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lang: ru
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lang: en
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```
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=== "Multiple languages"
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@ -54,7 +54,7 @@ The following configuration options are supported:
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- search:
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lang: # (1)!
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- en
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- ru
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- de
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```
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1. Be aware that including support for other languages increases the
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@ -101,48 +101,85 @@ The following configuration options are supported:
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``` yaml
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plugins:
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- search:
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separator: '[\s\-\.]' # (1)!
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separator: '[\s\-\.]+'
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```
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1. Tokenization itself is carried out by [lunr's default tokenizer], which
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doesn't allow for lookahead or multi-character separators. For more
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finegrained control over the tokenization process, see the section on
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[tokenizer lookahead].
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<div class="mdx-deprecated" markdown>
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[`prebuild_index`](#+search.prebuild_index){ #+search.prebuild_index }
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: [:octicons-tag-24: 5.0.0][prebuilt index support] · :octicons-archive-24:
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Deprecated · :octicons-trash-24: 8.0.0 · :octicons-milestone-24: Default:
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`false` – MkDocs can generate a [prebuilt index] of all pages during
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build time, which provides performance improvements at the cost of more
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bandwidth, as it reduces the build time of the search index:
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With :octicons-tag-24: 9.0.0, a faster and more flexible tokenizer method
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is shipped, allowing for __tokenizing with lookahead__, which yields more
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influence on the way documents are indexed. As a result, we use the
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following separator setting for this site's search:
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``` yaml
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plugins:
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- search:
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prebuild_index: true
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separator: '[\s\-,:!=\[\]()"/]+|(?!\b)(?=[A-Z][a-z])|\.(?!\d)|&[lg]t;'
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```
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Note that this configuration option was removed, as the [new search
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plugin] generates up to [50% smaller] search indexes, doubling search
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performance.
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Broken into its parts, the separator induces the following behavior:
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[:octicons-arrow-right-24: Read more on the new search plugin]
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[new search plugin]
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=== "Special characters"
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</div>
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```
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[\s\-,:!=\[\]()"/]+
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```
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The first part of the expression inserts token boundaries for each
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document before and after whitespace, hyphens, commas, brackets and
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other special characters. If several of those special characters are
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adjacent, they are treated as one.
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=== "Case changes"
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```
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(?!\b)(?=[A-Z][a-z])
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```
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Many programming languages have naming conventions like `PascalCase` or
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`camelCase`. By adding this subexpression to the separator,
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[words are split at case changes], tokenizing the word `PascalCase`
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into `Pascal` and `Case`.
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[:octicons-arrow-right-24: Read more on tokenizing case changes]
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[tokenize case changes]
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=== "Version strings"
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```
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\.(?!\d)
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```
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When adding `.` to the separator, version strings like `1.2.3` are split
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into `1`, `2` and `3`, which makes them undiscoverable via search. When
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using this subexpression, a small lookahead is introduced which will
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[preserve version strings] and keep them discoverable.
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[:octicons-arrow-right-24: Read more on tokenizing version numbers]
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[tokenize version numbers]
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=== "HTML/XML tags"
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```
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&[lg]t;
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```
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If your documentation includes HTML/XML code examples, you may want to allow
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users to find specific tag names. Unfortunately, the `<` and `>` control
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characters are encoded in code blocks as `<` and `>`. Adding this
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subexpression to the separator allows for just that.
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[:octicons-arrow-right-24: Read more on tokenizing HTML/XML tags]
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[tokenize html-xml tags]
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[Search support]: https://github.com/squidfunk/mkdocs-material/releases/tag/0.1.0
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[lunr]: https://lunrjs.com
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[lunr-languages]: https://github.com/MihaiValentin/lunr-languages
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[lunr's default tokenizer]: https://github.com/olivernn/lunr.js/blob/aa5a878f62a6bba1e8e5b95714899e17e8150b38/lunr.js#L413-L456
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[site language]: changing-the-language.md#site-language
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[tokenizer lookahead]: #tokenizer-lookahead
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[prebuilt index support]: https://github.com/squidfunk/mkdocs-material/releases/tag/5.0.0
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[prebuilt index]: https://www.mkdocs.org/user-guide/configuration/#prebuild_index
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[50% smaller]: ../blog/posts/search-better-faster-smaller.md#benchmarks
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[words are split at case changes]: ?q=searchHighlight
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[preserve version strings]: ?q=9.0.0
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[tokenize case changes]: ../blog/posts/search-better-faster-smaller.md#case-changes
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[tokenize version numbers]: ../blog/posts/search-better-faster-smaller.md#version-numbers
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[tokenize html-xml tags]: ../blog/posts/search-better-faster-smaller.md#htmlxml-tags
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#### Chinese language support
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@ -195,6 +232,7 @@ configuration options are available:
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User dictionaries can be used for tuning the segmenter to preserve
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technical terms.
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[Insiders]: ../insiders/index.md
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[chinese search]: ../blog/posts/chinese-search-support.md
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[jieba]: https://pypi.org/project/jieba/
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[built-in search plugin]: #built-in-search-plugin
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@ -203,96 +241,6 @@ configuration options are available:
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[dict.txt.big]: https://github.com/fxsjy/jieba/raw/master/extra_dict/dict.txt.big
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[user dictionary]: https://github.com/fxsjy/jieba#%E8%BD%BD%E5%85%A5%E8%AF%8D%E5%85%B8
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### Rich search previews
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[:octicons-heart-fill-24:{ .mdx-heart } Sponsors only][Insiders]{ .mdx-insiders } ·
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[:octicons-tag-24: insiders-3.0.0][Insiders] ·
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:octicons-beaker-24: Experimental
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[Insiders] ships rich search previews as part of the [new search plugin], which
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will render code blocks directly in the search result, and highlight all
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occurrences inside those blocks:
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=== "Insiders"
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![search preview now]
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=== "Material for MkDocs"
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![search preview before]
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[Insiders]: ../insiders/index.md
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[new search plugin]: ../blog/posts/search-better-faster-smaller.md
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[search preview now]: ../blog/posts/search-better-faster-smaller/search-preview-now.png
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[search preview before]: ../blog/posts/search-better-faster-smaller/search-preview-before.png
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### Tokenizer lookahead
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[:octicons-heart-fill-24:{ .mdx-heart } Sponsors only][Insiders]{ .mdx-insiders } ·
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[:octicons-tag-24: insiders-3.0.0][Insiders] ·
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:octicons-beaker-24: Experimental
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[Insiders] allows for more complex configurations of the [`separator`][separator]
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setting as part of the [new search plugin], yielding more influence on the way
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documents are tokenized:
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``` yaml
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plugins:
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- search:
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separator: '[\s\-,:!=\[\]()"/]+|\.(?!\d)|&[lg]t;|(?!\b)(?=[A-Z][a-z])'
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```
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The following section explains what can be achieved with tokenizer lookahead:
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=== "Case changes"
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```
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(?!\b)(?=[A-Z][a-z])
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```
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`PascalCase` and `camelCase` are used as naming conventions in many
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programming languages. By adding this match group to the [`separator`]
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[separator], [words are split at case changes], tokenizing the word
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`PascalCase` into `Pascal` and `Case`, so both terms can be searched
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individually.
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[:octicons-arrow-right-24: Read more on tokenizing case changes]
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[tokenize case changes]
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=== "Version numbers"
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```
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\.(?!\d)
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```
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When `.` is added to the [`separator`][separator], version numbers would be
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split into parts, rendering them undiscoverable via search. By adding
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this match group, a small lookahead is introduced, so version numbers will
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remain as they are, and can be found through search.
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[:octicons-arrow-right-24: Read more on tokenizing version numbers]
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[tokenize version numbers]
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=== "HTML/XML tags"
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```
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&[lg]t;
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```
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If your documentation includes HTML/XML code examples, you may want to allow
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users to find specific tag names. Unfortunately, the `<` and `>` control
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characters are encoded in code blocks as `<` and `>`. Adding this
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expression to the separator allows for just that.
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[:octicons-arrow-right-24: Read more on tokenizing HTML/XML tags]
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[tokenize html-xml tags]
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[separator]: #search-separator
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[words are split at case changes]: ?q=searchHighlight
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[tokenize case changes]: ../blog/posts/search-better-faster-smaller.md#case-changes
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[tokenize version numbers]: ../blog/posts/search-better-faster-smaller.md#version-numbers
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[tokenize html-xml tags]: ../blog/posts/search-better-faster-smaller.md#htmlxml-tags
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### Search suggestions
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[:octicons-tag-24: 7.2.0][Search suggestions support] ·
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@ -340,8 +288,7 @@ highlights all occurrences of both terms.
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### Search sharing
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[:octicons-tag-24: 7.2.0][Search sharing support] ·
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:octicons-unlock-24: Feature flag ·
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:octicons-beaker-24: Experimental
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:octicons-unlock-24: Feature flag
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When search sharing is activated, a :material-share-variant: share button is
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rendered next to the reset button, which allows to deep link to the current
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@ -362,32 +309,44 @@ clipboard.
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### Search boosting
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[:octicons-tag-24: 8.3.0][boost support] ·
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:octicons-beaker-24: Experimental
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[:octicons-tag-24: 8.3.0][boost support]
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Pages can be boosted in search with the front matter `search.boost` property,
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which will make them rank higher. Add the following lines at the top of a
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Markdown file:
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``` yaml
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---
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search:
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boost: 2 # (1)!
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---
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=== ":material-arrow-up-circle: Rank up"
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# Document title
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...
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```
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``` yaml
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---
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search:
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boost: 2 # (1)!
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---
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1. :woman_in_lotus_position: When boosting pages, be gentle and start with
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__low values__.
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# Document title
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...
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```
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1. :woman_in_lotus_position: When boosting pages, be gentle and start with
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__low values__.
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=== ":material-arrow-down-circle: Rank down"
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``` yaml
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---
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search:
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boost: 0.5
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---
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# Document title
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...
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```
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[boost support]: https://github.com/squidfunk/mkdocs-material/releases/tag/8.3.0
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### Search exclusion
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[:octicons-heart-fill-24:{ .mdx-heart } Sponsors only][Insiders]{ .mdx-insiders } ·
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[:octicons-tag-24: insiders-3.1.0][Insiders] ·
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[:octicons-tag-24: 9.0.0][exclusion support] ·
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:octicons-beaker-24: Experimental
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Pages can be excluded from search with the front matter `search.exclude`
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@ -404,10 +363,12 @@ search:
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...
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```
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[exclusion support]: https://github.com/squidfunk/mkdocs-material/releases/tag/9.0.0
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#### Excluding sections
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When [Attribute Lists] is enabled, specific sections of pages can be excluded
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from search by adding the `{ data-search-exclude }` pragma after a Markdown
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from search by adding the `data-search-exclude` pragma after a Markdown
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heading:
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=== ":octicons-file-code-16: `docs/page.md`"
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@ -449,7 +410,7 @@ heading:
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#### Excluding blocks
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When [Attribute Lists] is enabled, specific sections of pages can be excluded
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from search by adding the `{ data-search-exclude }` pragma after a Markdown
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from search by adding the `data-search-exclude` pragma after a Markdown
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inline- or block-level element:
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=== ":octicons-file-code-16: `docs/page.md`"
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@ -477,112 +438,3 @@ inline- or block-level element:
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]
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}
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```
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## Customization
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The search implementation of Material for MkDocs is probably its most
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sophisticated feature, as it tries to balance a great typeahead experience,
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good performance, accessibility, and a result list that is easy to scan.
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This is where Material for MkDocs deviates from other themes.
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The following section explains how search can be customized to tailor it to
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your needs.
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### Query transformation
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When a user enters a query into the search box, the query is pre-processed
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before it is submitted to the search index. Material for MkDocs will apply the
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following transformations, which can be customized by [extending the theme]:
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``` ts
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export function defaultTransform(query: string): string {
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return query
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.split(/"([^"]+)"/g) /* (1)! */
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.map((terms, index) => index & 1
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? terms.replace(/^\b|^(?![^\x00-\x7F]|$)|\s+/g, " +")
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: terms
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)
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.join("")
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.replace(/"|(?:^|\s+)[*+\-:^~]+(?=\s+|$)/g, "") /* (2)! */
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.trim() /* (3)! */
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}
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```
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1. Search for terms in quotation marks and prepend a `+` modifier to denote
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that the resulting document must contain all terms, converting the query
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to an `AND` query (as opposed to the default `OR` behavior). While users
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may expect terms enclosed in quotation marks to map to span queries, i.e.
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for which order is important, `lunr` doesn't support them, so the best
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we can do is to convert the terms to an `AND` query.
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2. Replace control characters which are not located at the beginning of the
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query or preceded by white space, or are not followed by a non-whitespace
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character or are at the end of the query string. Furthermore, filter
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unmatched quotation marks.
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3. Trim excess whitespace from left and right.
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If you want to switch to the default behavior of the `mkdocs` and `readthedocs`
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themes, both of which don't transform the query prior to submission, or
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customize the `transform` function, you can do this by [overriding the
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`config` block][overriding blocks]:
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``` html
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{% extends "base.html" %}
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{% block config %}
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{{ super() }}
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<script>
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var __search = {
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transform: function(query) {
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return query
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}
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}
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</script>
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{% endblock %}
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```
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The `transform` function will receive the query string as entered by the user
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and must return the processed query string to be submitted to the search index.
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[extending the theme]: ../customization.md#extending-the-theme
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[overriding blocks]: ../customization.md#overriding-blocks
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### Custom search
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Material for MkDocs implements search as part of a [web worker]. If you
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want to switch the web worker with your own implementation, e.g. to submit
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search to an external service, you can add a custom JavaScript file to the
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`docs` directory and [override the `config` block][overriding blocks]:
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``` html
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{% extends "base.html" %}
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{% block config %}
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{{ super() }}
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<script>
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var __search = {
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worker: "<url>"
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}
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</script>
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{% endblock %}
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```
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Communication with the search worker is implemented using a designated message
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format using discriminated unions, i.e. through the `type` property of the
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message. See the following interface definitions to learn about the message
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formats:
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- [:octicons-file-code-24: `SearchMessage`][SearchMessage]
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- [:octicons-file-code-24: `SearchIndex` and `SearchResult`][SearchIndex]
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|
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The sequence and direction of messages is rather intuitive:
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- :octicons-arrow-right-24: `SearchSetupMessage`
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- :octicons-arrow-left-24: `SearchReadyMessage`
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- :octicons-arrow-right-24: `SearchQueryMessage`
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- :octicons-arrow-left-24: `SearchResultMessage`
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[web worker]: https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers
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[SearchMessage]: https://github.com/squidfunk/mkdocs-material/blob/master/src/assets/javascripts/integrations/search/worker/message/index.ts
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[SearchIndex]: https://github.com/squidfunk/mkdocs-material/blob/master/src/assets/javascripts/integrations/search/_/index.ts
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@ -84,7 +84,7 @@ theme:
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# Plugins
|
||||
plugins:
|
||||
- search:
|
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separator: '[\s,:!=\[\]()"`/]+|\.(?!\d)|&[lg]t;|(?!\b)(?=[A-Z][a-z])'
|
||||
separator: '[\s\-,:!=\[\]()"`/]+|\.(?!\d)|&[lg]t;|(?!\b)(?=[A-Z][a-z])'
|
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- redirects:
|
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redirect_maps:
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changelog/insiders.md: insiders/changelog.md
|
||||
|
||||
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