emacs - Open selection in different major mode. -

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is possible select parts of text , open in different buffer different mode?

fore example, if work in ess mode (syntax highlighting r),

astring <- '<form> <input type="checkbox" id="foo", value="bar"> </form>'

if text within single quotes selected, edit in new buffer html mode (similar org-src-lang-modes in orgmode).

here 1 method of handling issue using narrow-to-region -- example contemplates point (cursor) somewhere between single quotes when typing m-x narrow-to-single-quotes. simple two-line function can used exit -- (widen) (ess-mode); or, can fancy recursive-edit. of course, not same opening text in new buffer. similar functionality can used copy region new buffer, assuming original poster may want incorporate edited text primary buffer.

(defun narrow-to-single-quotes () "when cursor (aka point) between single quotes, function narrow region whatever between single quotes, , change major mode `html-mode`.  exit, type `m-x widen` , `m-x [whatever-previous-major-mode-was-used]`." (interactive)   (let* (       (init-pos (point))       beg       end)     (re-search-backward "'" nil t)     (forward-char 1)     (setq beg (point))     (re-search-forward "'" nil t)     (backward-char 1)     (setq end (point))     (narrow-to-region beg end)     (html-mode)     (goto-char init-pos)))

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