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;;; $Id: hm--html-drag-and-drop.el,v 1.5 1997/02/12 00:21:03 muenkel Exp $
;;;
;;; Copyright (C) 1996, 1997 Heiko Muenkel
;;; email: muenkel@tnt.uni-hannover.de
;;;
;;; This program is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 1, or (at your option)
;;; any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program; if not, write to the Free Software
;;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
;;;
;;;
;;; Description:
;;;
;;; This package contains functions to insert links and other
;;; HTML stuff with the mouse with drag and drop.
;;;
;;; For further descriptions look at the file
;;; internal-drag-and-drop.el, which implements the basic (and
;;; more genreal functions) for the drag and drop interface.
;;;
;;; Installation:
;;;
;;; Put this file in your load path.
;;;
(require 'internal-drag-and-drop)
(require 'cl)
;(defun hm--html-first-non-matching-position (string1 string2)
; "Compares both strings and returns the first position, which is not equal."
; (let ((n 0)
; (max-n (min (length string1) (length string2)))
; (continue t))
; (while (and continue (< n max-n))
; (when (setq continue (= (aref string1 n) (aref string2 n)))
; (setq n (1+ n))))
; n))
;(defun hm--html-count-subdirs (directory)
; "Returns the number of subdirectories of DIRECTORY."
; (let ((n 0)
; (max-n (1- (length directory)))
; (count 0))
; (while (< n max-n)
; (when (= ?/ (aref directory n))
; (setq count (1+ count)))
; (setq n (1+ n)))
; (when (and (not (= 0 (length directory)))
; (not (= ?/ (aref directory 0))))
; (setq count (1+ count)))
; count))
;(defun hm--html-return-n-backwards (n)
; "Returns a string with N ../"
; (cond ((= n 0) "")
; (t (concat "../" (hm--html-return-n-backwards (1- n))))))
;(defun* hm--html-file-relative-name (file-name
; &optional (directory default-directory))
; "Convert FILENAME to be relative to DIRECTORY (default: default-directory)."
; (let* ((pos (hm--html-first-non-matching-position file-name directory))
; (backwards (hm--html-count-subdirs (substring directory pos)))
; (relative-name (concat (hm--html-return-n-backwards backwards)
; (substring file-name pos))))
; (if (= 0 (length relative-name))
; "./"
; (if (= ?/ (aref relative-name 0))
; (if (= 1 (length relative-name))
; "./"
; (substring relative-name 1))
; relative-name))))
(defun hm--html-idd-add-include-image-from-dired-line (source destination)
"Inserts an include image tag at the DESTINATION.
The name of the image is on a line in a dired buffer. It is specified by the
SOURCE."
(idd-set-point destination)
(if hm--html-idd-create-relative-links
(hm--html-add-image-top (file-relative-name
(idd-get-dired-filename-from-line source))
(file-name-nondirectory
(idd-get-dired-filename-from-line source)))
(hm--html-add-image-top (idd-get-dired-filename-from-line source)
(file-name-nondirectory
(idd-get-dired-filename-from-line source)))))
(defun hm--html-idd-add-link-to-region (link-object destination)
"Inserts a link with the LINK-OBJECT in the DESTINATION.
It uses the region as the name of the link."
(idd-set-region destination)
(hm--html-add-normal-link-to-region link-object)
)
(defun hm--html-idd-add-link (link-object destination)
"Inserts a link with the LINK-OBJECT in the DESTINATION."
(idd-set-point destination)
(hm--html-add-normal-link link-object))
(defun hm--html-idd-add-link-to-point-or-region (link-object destination)
"Inserts a link with the LINK-OBJECT in the DESTINATION.
It uses the region as the name of the link, if the region was active
in the DESTINATION."
(if (cdr (assoc ':region-active destination))
(hm--html-idd-add-link-to-region link-object destination)
(hm--html-idd-add-link link-object destination)))
(defun hm--html-idd-add-file-link-to-file-on-dired-line (source destination)
"Inserts a file link in DESTINATION to the file on the dired line of SOURCE."
(idd-set-point destination)
(if hm--html-idd-create-relative-links
(hm--html-idd-add-link-to-point-or-region
(file-relative-name
(idd-get-dired-filename-from-line source))
destination)
(hm--html-idd-add-link-to-point-or-region
(concat "file://" (idd-get-dired-filename-from-line source))
destination)))
(defun hm--html-idd-add-file-link-to-buffer (source destination)
"Inserts a file link at DESTINATION to the file of the SOURCE buffer."
(idd-set-point destination)
(if hm--html-idd-create-relative-links
(hm--html-idd-add-link-to-point-or-region
(file-relative-name (idd-get-local-filename source))
destination)
(hm--html-idd-add-link-to-point-or-region
(concat "file://" (idd-get-local-filename source))
destination)))
(defun hm--html-idd-add-file-link-to-directory-of-buffer (source
destination)
"Inserts a file link at DESTINATION to the directory of the SOURCE buffer."
(idd-set-point destination)
(if hm--html-idd-create-relative-links
(hm--html-idd-add-link-to-point-or-region
(file-relative-name (idd-get-directory-of-buffer source))
destination)
(hm--html-idd-add-link-to-point-or-region
(concat "file://" (idd-get-directory-of-buffer source))
destination)))
(defun hm--html-idd-add-html-link-to-w3-buffer (source destination)
"Inserts a link at DESTINATION to the w3 buffer specified by the SOURCE.
Note: Relative links are currently not supported for this function."
(idd-set-point destination)
(hm--html-idd-add-link-to-point-or-region (idd-get-buffer-url source)
destination))
(defun hm--html-idd-add-html-link-from-w3-buffer-point (source destination)
"Inserts a link at DESTINATION to a lin in the w3 buffer.
The link in the w3-buffer is specified by the SOURCE.
Note: Relative links are currently not supported for this function."
(idd-set-point destination)
(hm--html-idd-add-link-to-point-or-region (idd-get-url-at-point source)
destination))
;;; Announce the feature hm--html-drag-and-drop
(provide 'hm--html-drag-and-drop)
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