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118 lines
4.6 KiB
EmacsLisp
118 lines
4.6 KiB
EmacsLisp
;;; phpinspect-buffer.el --- PHP parsing and completion package -*- lexical-binding: t; -*-
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;; Copyright (C) 2021 Free Software Foundation, Inc
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;; Author: Hugo Thunnissen <devel@hugot.nl>
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;; Keywords: php, languages, tools, convenience
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;; Version: 0
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;; This program 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 of the License, or
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;; (at your option) any later version.
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;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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;;(require 'phpinspect-tree)
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(require 'phpinspect-bmap)
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(require 'phpinspect-edtrack)
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(defvar-local phpinspect-current-buffer nil
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"An instance of `phpinspect-buffer' local to the active
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buffer. This variable is only set for buffers where
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`phpinspect-mode' is active. Also see `phpinspect-buffer'.")
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(cl-defstruct (phpinspect-buffer (:constructor phpinspect-make-buffer))
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"An object containing phpinspect related metadata linked to an
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emacs buffer."
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(buffer nil
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:type buffer
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:documentation "The associated emacs buffer")
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(tree nil
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:documentation
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"Parsed token tree that resulted from last parse")
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(map nil
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:type phpinspect-bmap)
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(edit-tracker (phpinspect-make-edtrack)
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:type phpinspect-edtrack))
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(cl-defmethod phpinspect-buffer-parse ((buffer phpinspect-buffer))
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"Parse the PHP code in the the emacs buffer that this object is
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linked with."
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(if (or (not (phpinspect-buffer-tree buffer))
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(phpinspect-edtrack-taint-pool (phpinspect-buffer-edit-tracker buffer)))
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(with-current-buffer (phpinspect-buffer-buffer buffer)
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(let* ((map (phpinspect-make-bmap))
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(buffer-map (phpinspect-buffer-map buffer))
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(ctx (phpinspect-make-pctx
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:interrupt-predicate #'input-pending-p
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:bmap map
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:incremental t
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:previous-bmap buffer-map
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:edtrack (phpinspect-buffer-edit-tracker buffer))))
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(phpinspect-with-parse-context ctx
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(let ((parsed (phpinspect-parse-current-buffer)))
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(setf (phpinspect-buffer-map buffer) map)
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(setf (phpinspect-buffer-tree buffer) parsed)
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(phpinspect-edtrack-clear (phpinspect-buffer-edit-tracker buffer))
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;; return
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parsed))))
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;; Else: Just return last parse result
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(phpinspect-buffer-tree buffer)))
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(cl-defmethod phpinspect-buffer-reparse ((buffer phpinspect-buffer))
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(setf (phpinspect-buffer-map buffer) (phpinspect-make-bmap))
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(phpinspect-buffer-parse buffer))
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(defsubst phpinspect-buffer-parse-map (buffer)
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(phpinspect-buffer-parse buffer)
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(phpinspect-buffer-map buffer))
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(cl-defmethod phpinspect-buffer-register-edit
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((buffer phpinspect-buffer) (start integer) (end integer) (pre-change-length integer))
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"Mark a region of the buffer as edited."
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;; Take into account "atoms" (tokens without clear delimiters like words,
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;; variables and object attributes. The meaning of these tokens will change as
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;; they grow or shrink, so their ful regions need to be marked for a reparse).
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(save-excursion
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(goto-char start)
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(when (looking-back "\\($->|::\\)?[^][)(}{[:blank:]\n;'\"]+" nil t)
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(setq start (- start (length (match-string 0))))))
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(phpinspect-edtrack-register-edit
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(phpinspect-buffer-edit-tracker buffer) start end pre-change-length))
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(cl-defmethod phpinspect-buffer-tokens-enclosing-point ((buffer phpinspect-buffer) point)
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(phpinspect-bmap-tokens-overlapping (phpinspect-buffer-map buffer) point))
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(cl-defmethod phpinspect-buffer-token-meta ((buffer phpinspect-buffer) token)
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(phpinspect-bmap-token-meta (phpinspect-buffer-map buffer) token))
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(cl-defmethod phpinspect-buffer-location-resolver ((buffer phpinspect-buffer))
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"Derive location resolver from BUFFER's buffer map. Guarantees to
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retrieve the lastest available map of BUFFER upon first
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invocation, but subsequent invocations will not update the used
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map afterwards, so don't keep the resolver around for long term
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use."
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(let ((bmap-resolver))
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(lambda (token)
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(funcall (with-memoization bmap-resolver
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(phpinspect-bmap-make-location-resolver (phpinspect-buffer-map buffer)))
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token))))
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(provide 'phpinspect-buffer)
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