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8762f6c7c9
This makes sure we don't interfere with other display specs, e.g. for images displayed in 'image-mode' (bug#73600). * lisp/visual-wrap.el (visual-wrap--safe-display-specs): New variable. (visual-wrap--display-property-safe-p): New function. (visual-wrap--apply-to-line): Use 'pos-eol'; we don't want to respect field boundaries here. (visual-wrap-prefix-function): Check for unsafe display properties at the end of the line and skip past them if present. * test/lisp/visual-wrap-tests.el: New test file.
120 lines
5.1 KiB
EmacsLisp
120 lines
5.1 KiB
EmacsLisp
;;; visual-wrap-tests.el --- Tests for `visual-wrap-prefix-mode' -*- lexical-binding: t; -*-
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;; Copyright (C) 2024 Free Software Foundation, Inc.
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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 of the License, or
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;; (at your option) 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. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Tets for `visual-wrap-prefix-mode'.
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;;; Code:
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(require 'visual-wrap)
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(require 'ert)
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;;; Tests:
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(ert-deftest visual-wrap-tests/simple ()
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"Test adding wrapping properties to text without display properties."
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(with-temp-buffer
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(insert "greetings\n* hello\n* hi")
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(visual-wrap-prefix-function (point-min) (point-max))
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(should (equal-including-properties
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(buffer-string)
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#("greetings\n* hello\n* hi"
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10 12 ( wrap-prefix (space :align-to (2 . width))
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display (min-width ((2 . width))))
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12 17 ( wrap-prefix (space :align-to (2 . width)))
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18 20 ( wrap-prefix (space :align-to (2 . width))
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display (min-width ((2 . width))))
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20 22 ( wrap-prefix (space :align-to (2 . width))))))))
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(ert-deftest visual-wrap-tests/safe-display ()
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"Test adding wrapping properties to text with safe display properties."
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(with-temp-buffer
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(insert #("* hello" 2 7 (display (raise 1))))
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(visual-wrap-prefix-function (point-min) (point-max))
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(should (equal-including-properties
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(buffer-string)
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#("* hello"
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0 2 ( wrap-prefix (space :align-to (2 . width))
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display (min-width ((2 . width))))
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2 7 ( wrap-prefix (space :align-to (2 . width))
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display (raise 1)))))))
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(ert-deftest visual-wrap-tests/unsafe-display/within-line ()
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"Test adding wrapping properties to text with unsafe display properties.
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When these properties don't extend across multiple lines,
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`visual-wrap-prefix-mode' can still add wrapping properties."
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(with-temp-buffer
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(insert #("* [img]" 2 7 (display (image :type bmp))))
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(visual-wrap-prefix-function (point-min) (point-max))
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(should (equal-including-properties
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(buffer-string)
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#("* [img]"
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0 2 ( wrap-prefix (space :align-to (2 . width))
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display (min-width ((2 . width))))
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2 7 ( wrap-prefix (space :align-to (2 . width))
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display (image :type bmp)))))))
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(ert-deftest visual-wrap-tests/unsafe-display/spanning-lines ()
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"Test adding wrapping properties to text with unsafe display properties.
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When these properties do extend across multiple lines,
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`visual-wrap-prefix-mode' must avoid adding wrapping properties."
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(with-temp-buffer
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(insert #("* a\n* b" 0 7 (display (image :type bmp))))
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(visual-wrap-prefix-function (point-min) (point-max))
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(should (equal-including-properties
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(buffer-string)
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#("* a\n* b" 0 7 (display (image :type bmp)))))))
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(ert-deftest visual-wrap-tests/unsafe-display/multiple-1 ()
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"Test adding wrapping properties to text with unsafe display properties.
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This tests a multi-line unsafe display prop immediately followed by a
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single-line unsafe display prop. `visual-wrap-prefix-mode' should *not*
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add wrapping properties to either block."
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(with-temp-buffer
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(insert #("* a\n* b"
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0 4 (display ((image :type bmp)))
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4 7 (display ((image :type bmp) (height 1.5)))))
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(visual-wrap-prefix-function (point-min) (point-max))
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(should (equal-including-properties
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(buffer-string)
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;; NOTE: See the note in `visual-wrap-prefix-function'. If
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;; applying the change mentioned there, then this case
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;; should add wrapping properties to the second block.
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#("* a\n* b"
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0 4 (display ((image :type bmp)))
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4 7 (display ((image :type bmp) (height 1.5))))))))
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(ert-deftest visual-wrap-tests/unsafe-display/multiple-2 ()
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"Test adding wrapping properties to text with unsafe display properties.
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This tests a multi-line unsafe display prop immediately followed by
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another multi-line unsafe display prop. `visual-wrap-prefix-mode'
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should *not* add wrapping properties to either block."
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(with-temp-buffer
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(insert #("* a\n* b\n"
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0 4 (display ((image :type bmp)))
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4 8 (display ((image :type bmp) (height 1.5)))))
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(visual-wrap-prefix-function (point-min) (point-max))
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(should (equal-including-properties
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(buffer-string)
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#("* a\n* b\n"
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0 4 (display ((image :type bmp)))
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4 8 (display ((image :type bmp) (height 1.5))))))))
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;; visual-wrap-tests.el ends here
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