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595 lines
18 KiB
EmacsLisp
595 lines
18 KiB
EmacsLisp
;;; rng-nxml.el --- make nxml-mode take advantage of rng-validate-mode
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;; Copyright (C) 2003, 2007 Free Software Foundation, Inc.
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;; Author: James Clark
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;; Keywords: XML, RelaxNG
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;;; Code:
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(require 'easymenu)
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(require 'xmltok)
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(require 'nxml-util)
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(require 'nxml-ns)
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(require 'rng-match)
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(require 'rng-util)
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(require 'rng-valid)
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(require 'nxml-mode)
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(require 'rng-loc)
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(defcustom rng-nxml-auto-validate-flag t
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"*Non-nil means automatically turn on validation with nxml-mode."
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:type 'boolean
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:group 'relax-ng)
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(defvar rng-preferred-prefix-alist-default nil
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"Default value for variable `rng-preferred-prefix-alist'.")
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(defcustom rng-preferred-prefix-alist rng-preferred-prefix-alist-default
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"*Alist of namespaces vs preferred prefixes."
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:type '(repeat (cons :tag "With"
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(string :tag "this namespace URI")
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(string :tag "use this prefix")))
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:group 'relax-ng)
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(defvar rng-complete-end-tags-after-< t
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"*Non-nil means immediately after < complete on end-tag names.
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Complete on start-tag names regardless.")
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(defvar rng-nxml-easy-menu
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'("XML"
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["Show Outline Only" nxml-hide-all-text-content]
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["Show Everything" nxml-show-all]
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"---"
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["Validation" rng-validate-mode
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:style toggle
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:selected rng-validate-mode]
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"---"
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("Set Schema"
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["Automatically" rng-auto-set-schema]
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("For Document Type"
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:filter (lambda (menu)
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(mapcar (lambda (type-id)
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(vector type-id
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(list 'rng-set-document-type
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type-id)))
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(rng-possible-type-ids))))
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["Any Well-Formed XML" rng-set-vacuous-schema]
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["File..." rng-set-schema-file])
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["Show Schema Location" rng-what-schema]
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["Save Schema Location" rng-save-schema-location :help
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"Save the location of the schema currently being used for this buffer"]
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"---"
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["First Error" rng-first-error :active rng-validate-mode]
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["Next Error" rng-next-error :active rng-validate-mode]
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"---"
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["Customize nXML" (customize-group 'nxml)]
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"---"
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["Show nXML Version" nxml-version]))
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;;;###autoload
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(defun rng-nxml-mode-init ()
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"Initialize `nxml-mode' to take advantage of `rng-validate-mode'.
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This is typically called from `nxml-mode-hook'.
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Validation will be enabled if `rng-nxml-auto-validate-flag' is non-nil."
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(interactive)
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(define-key nxml-mode-map "\C-c\C-v" 'rng-validate-mode)
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(define-key nxml-mode-map "\C-c\C-s\C-w" 'rng-what-schema)
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(define-key nxml-mode-map "\C-c\C-s\C-a" 'rng-auto-set-schema-and-validate)
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(define-key nxml-mode-map "\C-c\C-s\C-f" 'rng-set-schema-file-and-validate)
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(define-key nxml-mode-map "\C-c\C-s\C-l" 'rng-save-schema-location)
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(define-key nxml-mode-map "\C-c\C-s\C-t" 'rng-set-document-type-and-validate)
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(define-key nxml-mode-map "\C-c\C-n" 'rng-next-error)
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(easy-menu-define rng-nxml-menu nxml-mode-map
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"Menu for nxml-mode used with rng-validate-mode."
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rng-nxml-easy-menu)
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(setq mode-line-process
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'(rng-validate-mode (:eval (rng-compute-mode-line-string))))
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(cond (rng-nxml-auto-validate-flag
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(rng-validate-mode 1)
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(add-hook 'nxml-completion-hook 'rng-complete nil t)
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(add-hook 'nxml-in-mixed-content-hook 'rng-in-mixed-content-p nil t))
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(t
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(rng-validate-mode 0)
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(remove-hook 'nxml-completion-hook 'rng-complete t)
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(remove-hook 'nxml-in-mixed-content-hook 'rng-in-mixed-content-p t))))
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(defvar rng-tag-history nil)
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(defvar rng-attribute-name-history nil)
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(defvar rng-attribute-value-history nil)
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(defvar rng-complete-target-names nil)
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(defvar rng-complete-name-attribute-flag nil)
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(defvar rng-complete-extra-strings nil)
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(defun rng-complete ()
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"Complete the string before point using the current schema.
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Return non-nil if in a context it understands."
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(interactive)
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(and rng-validate-mode
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(let ((lt-pos (save-excursion (search-backward "<" nil t)))
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xmltok-dtd)
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(and lt-pos
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(= (rng-set-state-after lt-pos) lt-pos)
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(or (rng-complete-tag lt-pos)
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(rng-complete-end-tag lt-pos)
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(rng-complete-attribute-name lt-pos)
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(rng-complete-attribute-value lt-pos))))))
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(defconst rng-in-start-tag-name-regex
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(replace-regexp-in-string
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"w"
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xmltok-ncname-regexp
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"<\\(?:w\\(?::w?\\)?\\)?\\="
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t
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t))
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(defun rng-complete-tag (lt-pos)
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(let (rng-complete-extra-strings)
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(when (and (= lt-pos (1- (point)))
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rng-complete-end-tags-after-<
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rng-open-elements
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(not (eq (car rng-open-elements) t))
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(or rng-collecting-text
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(rng-match-save
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(rng-match-end-tag))))
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(setq rng-complete-extra-strings
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(cons (concat "/"
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(if (caar rng-open-elements)
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(concat (caar rng-open-elements)
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":"
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(cdar rng-open-elements))
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(cdar rng-open-elements)))
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rng-complete-extra-strings)))
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(when (save-excursion
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(re-search-backward rng-in-start-tag-name-regex
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lt-pos
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t))
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(and rng-collecting-text (rng-flush-text))
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(let ((completion
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(let ((rng-complete-target-names
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(rng-match-possible-start-tag-names))
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(rng-complete-name-attribute-flag nil))
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(rng-complete-before-point (1+ lt-pos)
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'rng-complete-qname-function
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"Tag: "
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nil
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'rng-tag-history)))
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name)
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(when completion
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(cond ((rng-qname-p completion)
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(setq name (rng-expand-qname completion
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t
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'rng-start-tag-expand-recover))
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(when (and name
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(rng-match-start-tag-open name)
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(or (not (rng-match-start-tag-close))
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;; need a namespace decl on the root element
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(and (car name)
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(not rng-open-elements))))
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;; attributes are required
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(insert " ")))
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((member completion rng-complete-extra-strings)
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(insert ">")))))
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t)))
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(defconst rng-in-end-tag-name-regex
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(replace-regexp-in-string
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"w"
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xmltok-ncname-regexp
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"</\\(?:w\\(?::w?\\)?\\)?\\="
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t
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t))
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(defun rng-complete-end-tag (lt-pos)
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(when (save-excursion
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(re-search-backward rng-in-end-tag-name-regex
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lt-pos
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t))
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(cond ((or (not rng-open-elements)
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(eq (car rng-open-elements) t))
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(message "No matching start-tag")
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(ding))
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(t
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(let ((start-tag-name
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(if (caar rng-open-elements)
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(concat (caar rng-open-elements)
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":"
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(cdar rng-open-elements))
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(cdar rng-open-elements)))
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(end-tag-name
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(buffer-substring-no-properties (+ (match-beginning 0) 2)
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(point))))
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(cond ((or (> (length end-tag-name)
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(length start-tag-name))
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(not (string= (substring start-tag-name
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0
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(length end-tag-name))
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end-tag-name)))
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(message "Expected end-tag %s"
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(rng-quote-string
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(concat "</" start-tag-name ">")))
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(ding))
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(t
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(delete-region (- (point) (length end-tag-name))
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(point))
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(insert start-tag-name ">")
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(when (not (or rng-collecting-text
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(rng-match-end-tag)))
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(message "Element %s is incomplete"
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(rng-quote-string start-tag-name))))))))
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t))
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(defconst rng-in-attribute-regex
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(replace-regexp-in-string
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"w"
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xmltok-ncname-regexp
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"<w\\(?::w\\)?\
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\\(?:[ \t\r\n]+w\\(?::w\\)?[ \t\r\n]*=\
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[ \t\r\n]*\\(?:\"[^\"]*\"\\|'[^']*'\\)\\)*\
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[ \t\r\n]+\\(\\(?:w\\(?::w?\\)?\\)?\\)\\="
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t
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t))
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(defvar rng-undeclared-prefixes nil)
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(defun rng-complete-attribute-name (lt-pos)
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(when (save-excursion
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(re-search-backward rng-in-attribute-regex lt-pos t))
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(let ((attribute-start (match-beginning 1))
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rng-undeclared-prefixes)
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(and (rng-adjust-state-for-attribute lt-pos
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attribute-start)
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(let ((rng-complete-target-names
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(rng-match-possible-attribute-names))
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(rng-complete-extra-strings
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(mapcar (lambda (prefix)
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(if prefix
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(concat "xmlns:" prefix)
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"xmlns"))
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rng-undeclared-prefixes))
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(rng-complete-name-attribute-flag t))
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(rng-complete-before-point attribute-start
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'rng-complete-qname-function
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"Attribute: "
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nil
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'rng-attribute-name-history))
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(insert "=\"")))
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t))
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(defconst rng-in-attribute-value-regex
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(replace-regexp-in-string
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"w"
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xmltok-ncname-regexp
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"<w\\(?::w\\)?\
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\\(?:[ \t\r\n]+w\\(?::w\\)?[ \t\r\n]*=\
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[ \t\r\n]*\\(?:\"[^\"]*\"\\|'[^']*'\\)\\)*\
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[ \t\r\n]+\\(w\\(:w\\)?\\)[ \t\r\n]*=[ \t\r\n]*\
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\\(\"[^\"]*\\|'[^']*\\)\\="
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t
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t))
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(defun rng-complete-attribute-value (lt-pos)
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(when (save-excursion
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(re-search-backward rng-in-attribute-value-regex lt-pos t))
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(let ((name-start (match-beginning 1))
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(name-end (match-end 1))
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(colon (match-beginning 2))
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(value-start (1+ (match-beginning 3))))
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(and (rng-adjust-state-for-attribute lt-pos
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name-start)
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(if (string= (buffer-substring-no-properties name-start
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(or colon name-end))
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"xmlns")
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(rng-complete-before-point
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value-start
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(rng-strings-to-completion-alist
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(rng-possible-namespace-uris
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(and colon
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(buffer-substring-no-properties (1+ colon) name-end))))
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"Namespace URI: "
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nil
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'rng-namespace-uri-history)
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(rng-adjust-state-for-attribute-value name-start
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colon
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name-end)
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(rng-complete-before-point
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value-start
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(rng-strings-to-completion-alist
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(rng-match-possible-value-strings))
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"Value: "
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nil
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'rng-attribute-value-history))
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(insert (char-before value-start))))
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t))
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(defun rng-possible-namespace-uris (prefix)
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(let ((ns (if prefix (nxml-ns-get-prefix prefix)
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(nxml-ns-get-default))))
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(if (and ns (memq prefix (nxml-ns-changed-prefixes)))
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(list (nxml-namespace-name ns))
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(mapcar 'nxml-namespace-name
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(delq nxml-xml-namespace-uri
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(rng-match-possible-namespace-uris))))))
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(defconst rng-qname-regexp
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(concat "\\`"
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xmltok-ncname-regexp
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"\\(?:" ":" xmltok-ncname-regexp "\\)" "?" "\\'"))
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(defun rng-qname-p (string)
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(and (string-match rng-qname-regexp string) t))
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(defun rng-expand-qname (qname &optional defaultp recover-fun)
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(setq qname (rng-split-qname qname))
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(let ((prefix (car qname)))
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(if prefix
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(let ((ns (nxml-ns-get-prefix qname)))
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(cond (ns (cons ns (cdr qname)))
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(recover-fun (funcall recover-fun prefix (cdr qname)))))
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(cons (and defaultp (nxml-ns-get-default)) (cdr qname)))))
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(defun rng-start-tag-expand-recover (prefix local-name)
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(let ((ns (rng-match-infer-start-tag-namespace local-name)))
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(and ns
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(cons ns local-name))))
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(defun rng-split-qname (qname)
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(if (string-match ":" qname)
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(cons (substring qname 0 (match-beginning 0))
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(substring qname (match-end 0)))
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(cons nil qname)))
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(defun rng-in-mixed-content-p ()
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"Return non-nil if point is in mixed content.
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Return nil only if point is definitely not in mixed content.
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If unsure, return non-nil."
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(if (eq rng-current-schema rng-any-element)
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t
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(rng-set-state-after)
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(rng-match-mixed-text)))
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(defun rng-set-state-after (&optional pos)
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"Set the state for after parsing the first token with endpoint >= POS.
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This does not change the xmltok state or point. However, it does
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set `xmltok-dtd'. Returns the position of the end of the token."
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(unless pos (setq pos (point)))
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(when (< rng-validate-up-to-date-end pos)
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(message "Parsing...")
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(while (and (rng-do-some-validation)
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(< rng-validate-up-to-date-end pos))
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;; Display percentage validated.
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(force-mode-line-update)
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;; Force redisplay but don't allow idle timers to run.
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(let ((timer-idle-list nil))
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(sit-for 0)))
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(message "Parsing...done"))
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(save-excursion
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(save-restriction
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(widen)
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(nxml-with-invisible-motion
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(if (= pos 1)
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(rng-set-initial-state)
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(let ((state (get-text-property (1- pos) 'rng-state)))
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(cond (state
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(rng-restore-state state)
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(goto-char pos))
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(t
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(let ((start (previous-single-property-change pos
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'rng-state)))
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(cond (start
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(rng-restore-state (get-text-property (1- start)
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'rng-state))
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(goto-char start))
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(t (rng-set-initial-state))))))))
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(xmltok-save
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(if (= (point) 1)
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(xmltok-forward-prolog)
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(setq xmltok-dtd rng-dtd))
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(cond ((and (< pos (point))
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;; This handles the case where the prolog ends
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;; with a < without any following name-start
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;; character. This will be treated by the parser
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;; as part of the prolog, but we want to treat
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;; it as the start of the instance.
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(eq (char-after pos) ?<)
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(<= (point)
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(save-excursion
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(goto-char (1+ pos))
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(skip-chars-forward " \t\r\n")
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(point))))
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pos)
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((< (point) pos)
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(let ((rng-dt-namespace-context-getter
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'(nxml-ns-get-context))
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(rng-parsing-for-state t))
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(rng-forward pos))
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(point))
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(t pos)))))))
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(defun rng-adjust-state-for-attribute (lt-pos start)
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(xmltok-save
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(save-excursion
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(goto-char lt-pos)
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(when (memq (xmltok-forward)
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'(start-tag
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partial-start-tag
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empty-element
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partial-empty-element))
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(when (< start (point))
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(setq xmltok-namespace-attributes
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(rng-prune-attribute-at start
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xmltok-namespace-attributes))
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(setq xmltok-attributes
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(rng-prune-attribute-at start
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xmltok-attributes)))
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(let ((rng-parsing-for-state t)
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(rng-dt-namespace-context-getter '(nxml-ns-get-context)))
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(rng-process-start-tag 'stop)
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(rng-find-undeclared-prefixes)
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t)))))
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(defun rng-find-undeclared-prefixes ()
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;; Start with the newly effective namespace declarations.
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;; (Includes declarations added during recovery.)
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(setq rng-undeclared-prefixes (nxml-ns-changed-prefixes))
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(let ((iter xmltok-attributes)
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(ns-state (nxml-ns-state))
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att)
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;; Add namespace prefixes used in this tag,
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;; but not declared in the parent.
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(nxml-ns-pop-state)
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(while iter
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(setq att (car iter))
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(let ((prefix (xmltok-attribute-prefix att)))
|
|
(when (and prefix
|
|
(not (member prefix rng-undeclared-prefixes))
|
|
(not (nxml-ns-get-prefix prefix)))
|
|
(setq rng-undeclared-prefixes
|
|
(cons prefix rng-undeclared-prefixes))))
|
|
(setq iter (cdr iter)))
|
|
(nxml-ns-set-state ns-state)
|
|
;; Remove namespace prefixes explicitly declared.
|
|
(setq iter xmltok-namespace-attributes)
|
|
(while iter
|
|
(setq att (car iter))
|
|
(setq rng-undeclared-prefixes
|
|
(delete (and (xmltok-attribute-prefix att)
|
|
(xmltok-attribute-local-name att))
|
|
rng-undeclared-prefixes))
|
|
(setq iter (cdr iter)))))
|
|
|
|
(defun rng-prune-attribute-at (start atts)
|
|
(when atts
|
|
(let ((cur atts))
|
|
(while (if (eq (xmltok-attribute-name-start (car cur)) start)
|
|
(progn
|
|
(setq atts (delq (car cur) atts))
|
|
nil)
|
|
(setq cur (cdr cur)))))
|
|
atts))
|
|
|
|
(defun rng-adjust-state-for-attribute-value (name-start
|
|
colon
|
|
name-end)
|
|
(let* ((prefix (if colon
|
|
(buffer-substring-no-properties name-start colon)
|
|
nil))
|
|
(local-name (buffer-substring-no-properties (if colon
|
|
(1+ colon)
|
|
name-start)
|
|
name-end))
|
|
(ns (and prefix (nxml-ns-get-prefix prefix))))
|
|
(and (or (not prefix) ns)
|
|
(rng-match-attribute-name (cons ns local-name)))))
|
|
|
|
(defun rng-complete-qname-function (string predicate flag)
|
|
(let ((alist (mapcar (lambda (name) (cons name nil))
|
|
(rng-generate-qname-list string))))
|
|
(cond ((not flag)
|
|
(try-completion string alist predicate))
|
|
((eq flag t)
|
|
(all-completions string alist predicate))
|
|
((eq flag 'lambda)
|
|
(and (assoc string alist) t)))))
|
|
|
|
(defun rng-generate-qname-list (&optional string)
|
|
(let ((forced-prefix (and string
|
|
(string-match ":" string)
|
|
(> (match-beginning 0) 0)
|
|
(substring string
|
|
0
|
|
(match-beginning 0))))
|
|
(namespaces (mapcar 'car rng-complete-target-names))
|
|
ns-prefixes-alist ns-prefixes iter ns prefer)
|
|
(while namespaces
|
|
(setq ns (car namespaces))
|
|
(when ns
|
|
(setq ns-prefixes-alist
|
|
(cons (cons ns (nxml-ns-prefixes-for
|
|
ns
|
|
rng-complete-name-attribute-flag))
|
|
ns-prefixes-alist)))
|
|
(setq namespaces (delq ns (cdr namespaces))))
|
|
(setq iter ns-prefixes-alist)
|
|
(while iter
|
|
(setq ns-prefixes (car iter))
|
|
(setq ns (car ns-prefixes))
|
|
(when (null (cdr ns-prefixes))
|
|
;; No declared prefix for the namespace
|
|
(if forced-prefix
|
|
;; If namespace non-nil and prefix undeclared,
|
|
;; use forced prefix.
|
|
(when (and ns
|
|
(not (nxml-ns-get-prefix forced-prefix)))
|
|
(setcdr ns-prefixes (list forced-prefix)))
|
|
(setq prefer (rng-get-preferred-unused-prefix ns))
|
|
(when prefer
|
|
(setcdr ns-prefixes (list prefer)))
|
|
;; Unless it's an attribute with a non-nil namespace,
|
|
;; allow no prefix for this namespace.
|
|
(unless rng-complete-name-attribute-flag
|
|
(setcdr ns-prefixes (cons nil (cdr ns-prefixes))))))
|
|
(setq iter (cdr iter)))
|
|
(rng-uniquify-equal
|
|
(sort (apply 'append
|
|
(cons rng-complete-extra-strings
|
|
(mapcar (lambda (name)
|
|
(if (car name)
|
|
(mapcar (lambda (prefix)
|
|
(if prefix
|
|
(concat prefix
|
|
":"
|
|
(cdr name))
|
|
(cdr name)))
|
|
(cdr (assoc (car name)
|
|
ns-prefixes-alist)))
|
|
(list (cdr name))))
|
|
rng-complete-target-names)))
|
|
'string<))))
|
|
|
|
(defun rng-get-preferred-unused-prefix (ns)
|
|
(let ((ns-prefix (assoc (symbol-name ns) rng-preferred-prefix-alist))
|
|
iter prefix)
|
|
(when ns-prefix
|
|
(setq prefix (cdr ns-prefix))
|
|
(when (nxml-ns-get-prefix prefix)
|
|
;; try to find an unused prefix
|
|
(setq iter (memq ns-prefix rng-preferred-prefix-alist))
|
|
(while (and iter
|
|
(setq ns-prefix (assoc ns iter)))
|
|
(if (nxml-ns-get-prefix (cdr ns-prefix))
|
|
(setq iter (memq ns-prefix iter))
|
|
(setq prefix (cdr ns-prefix))
|
|
nil))))
|
|
prefix))
|
|
|
|
(defun rng-strings-to-completion-alist (strings)
|
|
(mapcar (lambda (s) (cons s s))
|
|
(rng-uniquify-equal (sort (mapcar 'rng-escape-string strings)
|
|
'string<))))
|
|
|
|
(provide 'rng-nxml)
|
|
|
|
;; arch-tag: bec0d6ed-6be1-4540-9c2c-6f56e8e55d8b
|
|
;;; rng-nxml.el ends here
|