2017-10-22 10:40:54 -04:00
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;;; org-goto.el --- Fast navigation in an Org buffer -*- lexical-binding: t; -*-
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2019-01-01 05:50:56 -05:00
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;; Copyright (C) 2012-2019 Free Software Foundation, Inc.
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2017-10-22 10:40:54 -04:00
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2017-10-23 03:57:13 -04:00
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;; Author: Carsten Dominik <carsten at orgmode dot org>
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2017-10-22 10:40:54 -04:00
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;; Keywords: outlines, hypermedia, calendar, wp
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2017-10-23 03:57:13 -04:00
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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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2017-10-23 03:57:13 -04:00
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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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2017-10-23 03:57:13 -04:00
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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2017-10-22 10:40:54 -04:00
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;;; Code:
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(require 'org-macs)
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(require 'org-compat)
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(declare-function org-at-heading-p "org" (&optional ignored))
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(declare-function org-beginning-of-line "org" (&optional n))
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(declare-function org-defkey "org" (keymap key def))
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(declare-function org-mark-ring-push "org" (&optional pos buffer))
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(declare-function org-overview "org" ())
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(declare-function org-refile-check-position "org" (refile-pointer))
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(declare-function org-refile-get-location "org" (&optional prompt default-buffer new-nodes))
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(declare-function org-show-context "org" (&optional key))
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(declare-function org-show-set-visibility "org" (detail))
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(defvar org-complex-heading-regexp)
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(defvar org-startup-align-all-tables)
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(defvar org-startup-folded)
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(defvar org-startup-truncated)
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(defvar org-special-ctrl-a/e)
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(defvar org-refile-target-verify-function)
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(defvar org-refile-use-outline-path)
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(defvar org-refile-targets)
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(defvar org-goto-exit-command nil)
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(defvar org-goto-map nil)
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(defvar org-goto-marker nil)
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(defvar org-goto-selected-point nil)
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(defvar org-goto-start-pos nil)
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(defvar org-goto-window-configuration nil)
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(defconst org-goto-local-auto-isearch-map (make-sparse-keymap))
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(set-keymap-parent org-goto-local-auto-isearch-map isearch-mode-map)
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(defconst org-goto-help
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"Browse buffer copy, to find location or copy text.%s
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RET=jump to location C-g=quit and return to previous location
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\[Up]/[Down]=next/prev headline TAB=cycle visibility [/] org-occur")
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;;; Customization
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(defgroup org-goto nil
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"Options concerning Org Goto navigation interface."
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:tag "Org Goto"
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:group 'org)
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(defcustom org-goto-interface 'outline
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"The default interface to be used for `org-goto'.
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Allowed values are:
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`outline'
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The interface shows an outline of the relevant file and the
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correct heading is found by moving through the outline or by
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searching with incremental search.
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`outline-path-completion'
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Headlines in the current buffer are offered via completion.
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This is the interface also used by the refile command."
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:group 'org-goto
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:type '(choice
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(const :tag "Outline" outline)
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(const :tag "Outline-path-completion" outline-path-completion)))
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(defcustom org-goto-max-level 5
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"Maximum target level when running `org-goto' with refile interface."
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:group 'org-goto
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:type 'integer)
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(defcustom org-goto-auto-isearch t
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"Non-nil means typing characters in `org-goto' starts incremental search.
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When nil, you can use these keybindings to navigate the buffer:
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q Quit the Org Goto interface
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n Go to the next visible heading
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p Go to the previous visible heading
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f Go one heading forward on same level
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b Go one heading backward on same level
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u Go one heading up"
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:group 'org-goto
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:type 'boolean)
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;;; Internal functions
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(defun org-goto--set-map ()
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"Set the keymap `org-goto'."
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(setq org-goto-map
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(let ((map (make-sparse-keymap)))
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(let ((cmds '(isearch-forward isearch-backward kill-ring-save set-mark-command
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mouse-drag-region universal-argument org-occur)))
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(dolist (cmd cmds)
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(substitute-key-definition cmd cmd map global-map)))
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(suppress-keymap map)
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(org-defkey map "\C-m" 'org-goto-ret)
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(org-defkey map [(return)] 'org-goto-ret)
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(org-defkey map [(left)] 'org-goto-left)
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(org-defkey map [(right)] 'org-goto-right)
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(org-defkey map [(control ?g)] 'org-goto-quit)
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(org-defkey map "\C-i" 'org-cycle)
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(org-defkey map [(tab)] 'org-cycle)
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(org-defkey map [(down)] 'outline-next-visible-heading)
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(org-defkey map [(up)] 'outline-previous-visible-heading)
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(if org-goto-auto-isearch
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(if (fboundp 'define-key-after)
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(define-key-after map [t] 'org-goto-local-auto-isearch)
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nil)
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(org-defkey map "q" 'org-goto-quit)
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(org-defkey map "n" 'outline-next-visible-heading)
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(org-defkey map "p" 'outline-previous-visible-heading)
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(org-defkey map "f" 'outline-forward-same-level)
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(org-defkey map "b" 'outline-backward-same-level)
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(org-defkey map "u" 'outline-up-heading))
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(org-defkey map "/" 'org-occur)
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(org-defkey map "\C-c\C-n" 'outline-next-visible-heading)
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(org-defkey map "\C-c\C-p" 'outline-previous-visible-heading)
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(org-defkey map "\C-c\C-f" 'outline-forward-same-level)
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(org-defkey map "\C-c\C-b" 'outline-backward-same-level)
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(org-defkey map "\C-c\C-u" 'outline-up-heading)
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map)))
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;; `isearch-other-control-char' was removed in Emacs 24.4.
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(if (fboundp 'isearch-other-control-char)
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(progn
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(define-key org-goto-local-auto-isearch-map "\C-i" 'isearch-other-control-char)
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(define-key org-goto-local-auto-isearch-map "\C-m" 'isearch-other-control-char))
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(define-key org-goto-local-auto-isearch-map "\C-i" nil)
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(define-key org-goto-local-auto-isearch-map "\C-m" nil)
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(define-key org-goto-local-auto-isearch-map [return] nil))
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(defun org-goto--local-search-headings (string bound noerror)
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"Search and make sure that any matches are in headlines."
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(catch 'return
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(while (if isearch-forward
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(search-forward string bound noerror)
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(search-backward string bound noerror))
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(when (save-match-data
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(and (save-excursion
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(beginning-of-line)
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(looking-at org-complex-heading-regexp))
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(or (not (match-beginning 5))
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(< (point) (match-beginning 5)))))
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(throw 'return (point))))))
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(defun org-goto-local-auto-isearch ()
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"Start isearch."
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(interactive)
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(goto-char (point-min))
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(let ((keys (this-command-keys)))
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(when (eq (lookup-key isearch-mode-map keys) 'isearch-printing-char)
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(isearch-mode t)
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(isearch-process-search-char (string-to-char keys))
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(org-font-lock-ensure))))
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(defun org-goto-ret (&optional _arg)
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"Finish `org-goto' by going to the new location."
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(interactive "P")
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(setq org-goto-selected-point (point))
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(setq org-goto-exit-command 'return)
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(throw 'exit nil))
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(defun org-goto-left ()
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"Finish `org-goto' by going to the new location."
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(interactive)
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(if (org-at-heading-p)
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(progn
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(beginning-of-line 1)
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(setq org-goto-selected-point (point)
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org-goto-exit-command 'left)
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(throw 'exit nil))
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(user-error "Not on a heading")))
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(defun org-goto-right ()
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"Finish `org-goto' by going to the new location."
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(interactive)
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(if (org-at-heading-p)
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(progn
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(setq org-goto-selected-point (point)
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org-goto-exit-command 'right)
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(throw 'exit nil))
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(user-error "Not on a heading")))
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(defun org-goto-quit ()
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"Finish `org-goto' without cursor motion."
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(interactive)
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(setq org-goto-selected-point nil)
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(setq org-goto-exit-command 'quit)
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(throw 'exit nil))
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;;; Public API
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;;;###autoload
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(defun org-goto-location (&optional _buf help)
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"Let the user select a location in current buffer.
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This function uses a recursive edit. It returns the selected
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position or nil."
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(org-no-popups
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(let ((isearch-mode-map org-goto-local-auto-isearch-map)
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(isearch-hide-immediately nil)
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(isearch-search-fun-function
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(lambda () #'org-goto--local-search-headings))
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(org-goto-selected-point org-goto-exit-command)
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(help (or help org-goto-help)))
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(save-excursion
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(save-window-excursion
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(delete-other-windows)
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(and (get-buffer "*org-goto*") (kill-buffer "*org-goto*"))
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(pop-to-buffer-same-window
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(condition-case nil
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(make-indirect-buffer (current-buffer) "*org-goto*")
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(error (make-indirect-buffer (current-buffer) "*org-goto*"))))
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(let (temp-buffer-show-function temp-buffer-show-hook)
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(with-output-to-temp-buffer "*Org Help*"
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(princ (format help (if org-goto-auto-isearch
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" Just type for auto-isearch."
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" n/p/f/b/u to navigate, q to quit.")))))
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(org-fit-window-to-buffer (get-buffer-window "*Org Help*"))
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(setq buffer-read-only nil)
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(let ((org-startup-truncated t)
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(org-startup-folded nil)
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(org-startup-align-all-tables nil))
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(org-mode)
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(org-overview))
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(setq buffer-read-only t)
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(if (and (boundp 'org-goto-start-pos)
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(integer-or-marker-p org-goto-start-pos))
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(progn (goto-char org-goto-start-pos)
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(when (org-invisible-p)
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(org-show-set-visibility 'lineage)))
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(goto-char (point-min)))
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(let (org-special-ctrl-a/e) (org-beginning-of-line))
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(message "Select location and press RET")
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(use-local-map org-goto-map)
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(recursive-edit)))
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(kill-buffer "*org-goto*")
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(cons org-goto-selected-point org-goto-exit-command))))
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;;;###autoload
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(defun org-goto (&optional alternative-interface)
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"Look up a different location in the current file, keeping current visibility.
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When you want look-up or go to a different location in a
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document, the fastest way is often to fold the entire buffer and
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then dive into the tree. This method has the disadvantage, that
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the previous location will be folded, which may not be what you
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want.
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This command works around this by showing a copy of the current
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buffer in an indirect buffer, in overview mode. You can dive
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into the tree in that copy, use org-occur and incremental search
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to find a location. When pressing RET or `Q', the command
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returns to the original buffer in which the visibility is still
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unchanged. After RET it will also jump to the location selected
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in the indirect buffer and expose the headline hierarchy above.
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With a prefix argument, use the alternative interface: e.g., if
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`org-goto-interface' is `outline' use `outline-path-completion'."
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(interactive "P")
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(org-goto--set-map)
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(let* ((org-refile-targets `((nil . (:maxlevel . ,org-goto-max-level))))
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(org-refile-use-outline-path t)
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(org-refile-target-verify-function nil)
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(interface
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(if (not alternative-interface)
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org-goto-interface
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(if (eq org-goto-interface 'outline)
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'outline-path-completion
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'outline)))
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(org-goto-start-pos (point))
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(selected-point
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(if (eq interface 'outline) (car (org-goto-location))
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(let ((pa (org-refile-get-location "Goto")))
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(org-refile-check-position pa)
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(nth 3 pa)))))
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(if selected-point
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(progn
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(org-mark-ring-push org-goto-start-pos)
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(goto-char selected-point)
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(when (or (org-invisible-p) (org-invisible-p2))
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(org-show-context 'org-goto)))
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(message "Quit"))))
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(provide 'org-goto)
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;;; org-goto.el ends here
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