"popup definition emacs" Code Answer's
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popup definition emacs
jordangarrison
on Mar 23, 2021
(defun rtags-peek-definition ()
"Peek at definition at point using rtags."
(interactive)
(let ((func (lambda ()
(rtags-find-symbol-at-point)
(rtags-location-stack-forward))))
(rtags-start-process-unless-running)
(make-peek-frame func)))
(defun make-peek-frame (find-definition-function &rest args)
"Make a new frame for peeking definition"
(when (or (not (rtags-called-interactively-p)) (rtags-sandbox-id-matches))
(let (summary
doc-frame
x y
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; 1. Find the absolute position of the current beginning of the symbol at point, ;;
;; in pixels. ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(abs-pixel-pos (save-excursion
(beginning-of-thing 'symbol)
(window-absolute-pixel-position))))
(setq x (car abs-pixel-pos))
;; (setq y (cdr abs-pixel-pos))
(setq y (+ (cdr abs-pixel-pos) (frame-char-height)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; 2. Create a new invisible frame, with the current buffer in it. ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(setq doc-frame (make-frame '((minibuffer . nil)
(name . "*RTags Peek*")
(width . 80)
(visibility . nil)
(height . 15))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; 3. Position the new frame right under the beginning of the symbol at point. ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(set-frame-position doc-frame x y)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; 4. Jump to the symbol at point. ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(with-selected-frame doc-frame
(apply find-definition-function args)
(read-only-mode)
(when semantic-stickyfunc-mode (semantic-stickyfunc-mode -1))
(recenter-top-bottom 0))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; 5. Make frame visible again ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(make-frame-visible doc-frame))))
Source: tuhdo.github.io
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