mirror of https://codeberg.org/cage/tinmop/
108 lines
4.3 KiB
Common Lisp
108 lines
4.3 KiB
Common Lisp
;; tinmop module for rewrite link URLs before opening
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;; Copyright © 2020 cage
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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 <http://www.gnu.org/licenses/>.
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(in-package :modules)
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(defparameter *rewriting-link-rules* '()
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"Before displaying messages that module will rewrites the first
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element of each item of this list with the second
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Example
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(\"foo\" \"bar\")
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^^^
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first
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^^^
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second
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will replace 'foo' with 'bar'.
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So the whole list is like: '((\"foo\" \"bar\") (\"old\" \"new\") ...)")
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(defun rewriting-link-add-rule (from to)
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(push (list from to)
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*rewriting-link-rules*))
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(defun rewriting-link-messages-links-rules (old-links)
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(let ((results ()))
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(loop for old-link in old-links do
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(loop named inner
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for rule in *rewriting-link-rules*
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do
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(let ((rewritten-link (cl-ppcre:regex-replace (first rule)
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old-link
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(second rule))))
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(when (string/= rewritten-link old-link)
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(push (cons old-link rewritten-link)
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results)
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(return-from inner t)))))
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results))
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(defun rewriting-link-replace-mapping (mapping text)
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(cl-ppcre:regex-replace-all (cl-ppcre:quote-meta-chars (car mapping))
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text
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(cdr mapping)))
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(defun rewriting-link-skipped-row-p (row)
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(let* ((original-type (message-window:row-get-original-object row))
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(skipped-row-types (list 'gemini-parser:pre-line
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'gemini-parser:pre-start
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'gemini-parser:pre-end
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'gemini-parser:vertical-space)))
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(or (message-window:row-invisible-p row)
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(find-if (lambda (a) (typep original-type a)) skipped-row-types))))
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(defun rewriting-link-rewrite-row (window index links-mapping)
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(with-accessors ((rows line-oriented-window:rows)) window
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(when rows
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(let* ((row (elt rows index))
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(original-string (line-oriented-window:normal-text row)))
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(when (not (rewriting-link-skipped-row-p row))
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(let* ((simple-string (tui:tui-string->chars-string original-string))
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(replaced-string simple-string))
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(loop for mapping in links-mapping do
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(setf replaced-string
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(rewriting-link-replace-mapping mapping replaced-string)))
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(setf (line-oriented-window:normal-text row)
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(tui:apply-coloring original-string replaced-string))
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(setf (elt rows index)
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(message-window:text->rendered-lines-rows window row))))))))
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(defun rewriting-link-message-hook-fn (message-window)
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(multiple-value-bind (x start-visible-index end-visible-index)
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(message-window:visible-rows message-window)
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(declare (ignore x))
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(loop for i from start-visible-index below end-visible-index do
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(rewriting-link-rewrite-row message-window i *rewriting-link-rules*))
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message-window))
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(defun rewriting-link-links-window-hook-fn (all-links)
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(let ((links-mapping (rewriting-link-messages-links-rules all-links))
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(results ()))
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(loop for link in all-links do
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(let* ((mapping (find-if (lambda (a) (string= link (car a))) links-mapping))
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(mapped (if mapping
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(rewriting-link-replace-mapping mapping link)
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link)))
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(push mapped results)))
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(reverse results)))
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(hooks:add-hook 'hooks:*before-rendering-message-text*
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#'rewriting-link-message-hook-fn)
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(hooks:add-hook 'hooks:*before-displaying-links-hook*
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#'rewriting-link-links-window-hook-fn)
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