Incremental search with face-remapping-alist does not always work

[Alin Soare <as1789@gmail.com>]

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I tried to configure the faces of isearch-mode, given that for each major
mode I defined a face-remapping-alist.


Here is my problem:

1. take the code below.

2. After evaluation, isearch seems to work nice.

3. Goto into the *Info* buffer.

4. Search the string from the title. (a string from a positon with
Info-title-1 face)

5. PROBLEM: the string of the title will get very small, and will change
the font.

6. QUESTION: How can this be avoided, and the expected behaviour be
accomplished ?



(defun isearch-setup ()
  (setq-local
   lazy-highlight-face
   (face-remap-add-relative 'lazy-highlight  '(:foreground "red") 'default))
  (setq-local
   isearch-face
   (face-remap-add-relative 'isearch  '(:strike-through "white") 'default))
  )

(defun isearch-exit ()
  (face-remap-remove-relative lazy-highlight-face)
  (face-remap-remove-relative isearch-face)
  (with-current-buffer (get-buffer " *Echo Area 0*")
    (face-remap-remove-relative echo-area-isearch-fail-face)
    )
  (with-current-buffer (get-buffer " *Echo Area 1*")
    (face-remap-remove-relative echo-area-isearch-fail-face)
    )
  )

(add-hook 'isearch-mode-hook 'isearch-setup)

(add-hook 'isearch-mode-end-hook 'isearch-exit)

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