184 lines
7.7 KiB
EmacsLisp
184 lines
7.7 KiB
EmacsLisp
;;; funcs.el --- C/C++ Layer functions File for Spacemacs
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;;
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;; Copyright (c) 2012-2018 Sylvain Benner & Contributors
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;;
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;; Author: Sylvain Benner <sylvain.benner@gmail.com>
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;; URL: https://github.com/syl20bnr/spacemacs
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;;
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;; This file is not part of GNU Emacs.
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;;
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;;; License: GPLv3
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(defun spacemacs//c-toggle-auto-newline ()
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"Toggle auto-newline."
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(c-toggle-auto-newline 1))
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;; clang
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(defun spacemacs/clang-format-function (&optional style)
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"Format the current function with clang-format according to STYLE."
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(interactive)
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(save-excursion
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(c-mark-function)
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(clang-format (region-beginning) (region-end) style)
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(deactivate-mark) ; If the function is already formatted, then remove the mark
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(message "Formatted function %s" (c-defun-name))))
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(defun spacemacs/clang-format-region-or-buffer (&optional style)
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"Format the current region or buffer with clang-format according to STYLE."
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(interactive)
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(save-excursion
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(if (region-active-p)
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(progn
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(clang-format-region (region-beginning) (region-end) style)
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(message "Formatted region"))
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(progn
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(clang-format-buffer style)
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(message "Formatted buffer %s" (buffer-name))))))
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(defun spacemacs//clang-format-on-save ()
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"Format the current buffer with clang-format on save when
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`c-c++-enable-clang-format-on-save' is non-nil."
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(when c-c++-enable-clang-format-on-save
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(spacemacs/clang-format-region-or-buffer)))
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(defun spacemacs/clang-format-on-save ()
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"Add before-save hook for clang-format."
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(add-hook 'before-save-hook 'spacemacs//clang-format-on-save nil t))
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(defun spacemacs/company-more-than-prefix-guesser ()
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(spacemacs/c-c++-load-clang-args)
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(company-clang-guess-prefix))
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;; Based on the Sarcasm/irony-mode compilation database code.
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(defun spacemacs/company-find-clang-complete-file ()
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(when buffer-file-name
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(let ((dir (locate-dominating-file buffer-file-name ".clang_complete")))
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(when dir
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(concat (file-name-as-directory dir) ".clang_complete")))))
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;; Based on the Sarcasm/irony-mode compilation database code.
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(defun spacemacs/company-load-clang-complete-file (cc-file)
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"Load the flags from CC-FILE, one flag per line."
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(let ((invocation-dir (expand-file-name (file-name-directory cc-file)))
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(case-fold-search nil)
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(include-regex "\\(-I\\|-isystem\\|-iquote\\|-idirafter\\)\\s-*\\(\\S-+\\)")
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compile-flags)
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(with-temp-buffer
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(insert-file-contents cc-file)
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;; Replace relative paths with absolute paths (by @trishume)
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;; (goto-char (point-min))
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(while (re-search-forward include-regex nil t)
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(replace-match (format "%s%s" (match-string 1)
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(expand-file-name (match-string 2)
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invocation-dir))))
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;; Turn lines into a list
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(setq compile-flags
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;; remove whitespaces at the end of each line, if any
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(mapcar #'(lambda (line)
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(if (string-match "[ \t]+$" line)
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(replace-match "" t t line)
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line))
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(split-string (buffer-string) "\n" t))))
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compile-flags))
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(defun spacemacs//c-c++-get-standard-include-paths (lang)
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"Returns the default system header include paths for LANG if gcc is on the
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system and supports it, else returns a default set of include paths."
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(let* ((start "#include <...> search starts here:")
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(end "End of search list.")
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(gcc-tmplt "echo | gcc -x%s -E -v - 2>&1")
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(sed-tmplt " | sed -n '/%s/,/%s/{/%s/b;/%s/b;p}' | sed -e 's/^ *//g'")
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(template (concat gcc-tmplt sed-tmplt))
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(inc-dirs-cmd (format template lang start end start end))
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(inc-dirs (split-string (shell-command-to-string inc-dirs-cmd)
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"\n" t)))
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(if (and inc-dirs (every 'file-exists-p inc-dirs))
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inc-dirs
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'("/usr/include" "/usr/local/include"))))
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(defun spacemacs//filter-and-substring (flags filter-prefix substr-index)
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"Returns all the strings in FLAGS starting with FILTER-PREFIX. The returned
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strings are substringed from SUBSTR-INDEX inclusive to the end of the string."
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(mapcar (lambda (f) (substring f substr-index))
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(remove-if-not (lambda (f) (string-prefix-p filter-prefix f))
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flags)))
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(defun spacemacs/c-c++-load-clang-args ()
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"Sets the arguments for company-clang, the system paths for company-c-headers
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and the arguments for flyckeck-clang based on a project-specific text file."
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(unless company-clang-arguments
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(let* ((cc-file (spacemacs/company-find-clang-complete-file))
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(flags (if cc-file
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(spacemacs/company-load-clang-complete-file cc-file)
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'()))
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(i-paths (spacemacs//filter-and-substring flags
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"-I" 2))
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(iquote-paths (spacemacs//filter-and-substring flags
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"-iquote" 7))
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(isystem-paths (spacemacs//filter-and-substring flags
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"-isystem" 8))
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(idirafter-paths (spacemacs//filter-and-substring flags
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"-idirafter" 10)))
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(setq-local company-clang-arguments flags)
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(setq-local flycheck-clang-args flags)
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(setq-local company-c-headers-path-user
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(append '(".")
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iquote-paths))
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(setq-local company-c-headers-path-system
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(append i-paths
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isystem-paths
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(when (string-equal major-mode "c++-mode")
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(spacemacs//c-c++-get-standard-include-paths "c++"))
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(when (string-equal major-mode "c-mode")
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(spacemacs//c-c++-get-standard-include-paths "c"))
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idirafter-paths)))))
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;; rtags
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(defun spacemacs/c-c++-use-rtags (&optional useFileManager)
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"Return non-nil if rtags function should be used."
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;; this function is used to fallback on gtags function if rtags is not
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;; supported. So if gtags layer is not used we disable the fallback by
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;; returning always t.
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(or (not (configuration-layer/layer-used-p 'gtags))
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(and (rtags-executable-find "rc")
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(cond ((not (gtags-get-rootpath)) t)
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((and (not (eq major-mode 'c++-mode))
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(not (eq major-mode 'c-mode))) (rtags-has-filemanager))
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(useFileManager (rtags-has-filemanager))
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(t (rtags-is-indexed))))))
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(defun spacemacs/c-c++-tags-find-symbol-at-point (&optional prefix)
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(interactive "P")
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(if (and (not (rtags-find-symbol-at-point prefix))
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rtags-last-request-not-indexed)
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(gtags-find-tag)))
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(defun spacemacs/c-c++-tags-find-references-at-point (&optional prefix)
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(interactive "P")
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(if (and (not (rtags-find-references-at-point prefix))
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rtags-last-request-not-indexed)
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(gtags-find-rtag)))
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(defun spacemacs/c-c++-tags-find-symbol ()
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(interactive)
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(call-interactively (if (spacemacs/c-c++-use-rtags)
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'rtags-find-symbol 'gtags-find-symbol)))
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(defun spacemacs/c-c++-tags-find-references ()
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(interactive)
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(call-interactively (if (spacemacs/c-c++-use-rtags)
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'rtags-find-references 'gtags-find-rtag)))
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(defun spacemacs/c-c++-tags-find-file ()
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(interactive)
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(call-interactively (if (spacemacs/c-c++-use-rtags t)
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'rtags-find-file 'gtags-find-file)))
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(defun spacemacs/c-c++-tags-imenu ()
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(interactive)
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(call-interactively (if (spacemacs/c-c++-use-rtags t)
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'rtags-imenu 'idomenu)))
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