79f5bc23d1
Normalize size units and intrinsic sizing across Elisp and native layout. Add help, pointer, hover-style and keymap support with reusable interaction adapters. Keep content updates local, preserve scroll caches and hover borders, and avoid rebuilding retained plans and ownership metadata for stable geometry. Validation: make check and native-rust-tests passed; targeted native interaction and scroll publication regressions passed.
156 lines
6.1 KiB
EmacsLisp
156 lines
6.1 KiB
EmacsLisp
;;; ebox-layout-config.el --- Typed Box layout selection -*- lexical-binding: t; -*-
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;;; Commentary:
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;; Owns the small backend-neutral value that selects one Box child-layout
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;; algorithm. Layout modules construct validated variants; the value itself
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;; carries no runtime identity, children, measurement, or publication state.
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;;; Code:
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(require 'cl-lib)
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(require 'seq)
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(require 'ebox-size)
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(declare-function ebox-flex-layout-config-props-p
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"ebox-flex" (props))
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(declare-function ebox-grid-layout-config-props-p
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"ebox-grid" (props))
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(declare-function ebox-flex-layout-create "ebox-flex" (&rest plist))
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(declare-function ebox-grid-layout-create "ebox-grid" (&rest plist))
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(cl-defstruct
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(ebox-layout-config
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(:constructor ebox-layout-config--create))
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"Canonical typed layout selection for one BoxNode."
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kind
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props)
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(defconst ebox-layout-config--simple-cross-align-values
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'(start center end stretch)
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"Canonical Row/Column cross-axis alignment values.")
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(defun ebox-layout-config--simple-axis-props-p (props kind)
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"Return non-nil when PROPS is canonical Row/Column KIND config data."
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(and (equal (mapcar #'car (seq-partition props 2))
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'(:item-gap :cross-align))
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(let ((gap (plist-get props :item-gap))
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(align (plist-get props :cross-align)))
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(and (ebox-size-value-for-axis-p
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gap (if (eq kind 'column) 'block 'inline))
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(memq align ebox-layout-config--simple-cross-align-values)))))
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(defun ebox-layout-config--simple-axis-create (kind plist)
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"Return validated simple-axis KIND LayoutConfig from PLIST."
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(unless (and (proper-list-p plist) (zerop (% (length plist) 2)))
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(error "Ebox %S LayoutConfig requires an even plist: %S" kind plist))
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(let ((seen (make-hash-table :test #'eq)))
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(cl-loop for (key _value) on plist by #'cddr
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unless (memq key '(:item-gap :cross-align))
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do (error "Ebox %S LayoutConfig does not accept %S" kind key)
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do (when (gethash key seen)
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(error "Duplicate Ebox %S LayoutConfig property: %S" kind key))
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do (puthash key t seen)))
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(let ((props
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(list :item-gap (if (plist-member plist :item-gap)
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(plist-get plist :item-gap)
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(if (eq kind 'column) '(lh 0) '(px 0)))
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:cross-align (if (plist-member plist :cross-align)
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(plist-get plist :cross-align)
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'stretch))))
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(ebox-size-validate-for-axis
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(plist-get props :item-gap) :item-gap
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(if (eq kind 'column) 'block 'inline))
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(unless (ebox-layout-config--simple-axis-props-p props kind)
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(error "Invalid Ebox %S LayoutConfig properties: %S" kind props))
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(ebox-layout-config--create :kind kind :props props)))
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(defun ebox-layout-config-validate (config)
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"Return CONFIG after revalidating its variant-owned properties."
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(unless (ebox-layout-config-p config)
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(error "Expected an Ebox LayoutConfig: %S" config))
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(let* ((kind (ebox-layout-config-kind config))
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(props (ebox-layout-config-props config))
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(valid-p
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(pcase kind
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('normal (null props))
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((or 'row 'column)
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(ebox-size-validate-for-axis
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(plist-get props :item-gap) :item-gap
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(if (eq kind 'column) 'block 'inline))
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(ebox-layout-config--simple-axis-props-p props kind))
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('flex
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(and (fboundp 'ebox-flex-layout-config-props-p)
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(ebox-flex-layout-config-props-p props)))
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('grid
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(and (fboundp 'ebox-grid-layout-config-props-p)
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(ebox-grid-layout-config-props-p props)))
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(_ nil))))
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(unless valid-p
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(error "Invalid %S LayoutConfig properties: %S"
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kind props)))
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config)
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(defun ebox-layout-config--copy (config)
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"Return a detached copy of validated CONFIG."
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(ebox-layout-config-validate config)
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(ebox-layout-config--create
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:kind (ebox-layout-config-kind config)
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:props (copy-tree (ebox-layout-config-props config))))
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(defun ebox-layout-config-with-props (config props)
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"Return CONFIG's variant with detached canonical PROPS.
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PROPS must already use the variant's normalized representation."
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(ebox-layout-config-validate config)
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(ebox-layout-config-validate
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(ebox-layout-config--create
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:kind (ebox-layout-config-kind config)
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:props (copy-tree props))))
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;;;###autoload
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(defun ebox-normal-layout-create ()
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"Return the canonical Normal layout config."
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(ebox-layout-config--create :kind 'normal :props nil))
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;;;###autoload
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(defun ebox-row-layout-create (&rest plist)
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"Return canonical RowConfig from evaluated PLIST."
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(ebox-layout-config--simple-axis-create 'row plist))
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;;;###autoload
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(defun ebox-column-layout-create (&rest plist)
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"Return canonical ColumnConfig from evaluated PLIST."
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(ebox-layout-config--simple-axis-create 'column plist))
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(defun ebox-layout-config-property-names (tag)
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"Return canonical property names owned by TAG's LayoutConfig."
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(pcase tag
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('flex
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'(:flex-direction :flex-wrap :justify-content
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:align-items :align-content :row-gap :column-gap))
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('grid
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'(:grid-template-columns :grid-template-rows
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:grid-auto-columns :grid-auto-rows :grid-auto-flow
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:row-gap :column-gap
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:justify-items :align-items :justify-content :align-content))
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('box nil)
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((or 'row 'column) '(:item-gap :cross-align))
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(_ (error "Unknown Ebox Box author form: %S" tag))))
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(defun ebox-layout-config-for-form (tag properties)
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"Return TAG's typed LayoutConfig from evaluated layout PROPERTIES."
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(pcase tag
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('box
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(when properties
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(error "Ebox Normal layout does not accept config properties: %S"
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properties))
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(ebox-normal-layout-create))
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('row (apply #'ebox-row-layout-create properties))
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('column (apply #'ebox-column-layout-create properties))
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('flex (apply #'ebox-flex-layout-create properties))
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('grid (apply #'ebox-grid-layout-create properties))
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(_ (error "Unknown Ebox Box author form: %S" tag))))
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(provide 'ebox-layout-config)
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;;; ebox-layout-config.el ends here
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