branch: master
commit 86852359c0c66b68ce50171bd95306ebd0f08b75
Author: Alexey Veretennikov <[email protected]>
Commit: Alexey Veretennikov <[email protected]>
Added support for 2 trees
---
ztree-view.el | 51 ++++++++++++++++++++++++++++++++++-----------------
1 files changed, 34 insertions(+), 17 deletions(-)
diff --git a/ztree-view.el b/ztree-view.el
index 629ead6..9cb72d0 100644
--- a/ztree-view.el
+++ b/ztree-view.el
@@ -172,6 +172,8 @@ the buffer is split to 2 trees")
;;;###autoload
(define-derived-mode ztree-mode special-mode "Ztree"
+ ;; only spaces
+ (setq indent-tabs-mode nil)
"A major mode for displaying the directory tree in text mode.")
@@ -292,30 +294,34 @@ apparently shall not be visible"
(ztree-draw-char ?\- (+ x1 x) y))))
-(defun ztree-draw-tree (tree offset)
+(defun ztree-draw-tree (tree depth start-offset)
"Draw the tree of lines with parents"
(if (atom tree)
nil
- (let ((root (car tree))
- (children (cdr tree)))
+ (let* ((root (car tree))
+ (children (cdr tree))
+ (offset (+ start-offset (* depth 4)))
+ (line-start (+ 3 offset))
+ (line-end-leaf (+ 7 offset))
+ (line-end-node (+ 4 offset)))
(when children
;; draw the line to the last child
;; since we push'd children to the list, the last line
;; is the first
(let ((last-child (car children))
- (x-offset (+ 2 (* offset 4))))
+ (x-offset (+ 2 offset)))
(if (atom last-child)
(ztree-draw-vertical-line (1+ root) last-child x-offset)
(ztree-draw-vertical-line (1+ root) (car last-child) x-offset)))
;; draw recursively
(dolist (child children)
- (ztree-draw-tree child (1+ offset))
+ (ztree-draw-tree child (1+ depth) start-offset)
(if (listp child)
- (ztree-draw-horizontal-line (+ 3 (* offset 4))
- (+ 4 (* offset 4))
+ (ztree-draw-horizontal-line line-start
+ line-end-node
(car child))
- (ztree-draw-horizontal-line (+ 3 (* offset 4))
- (+ 7 (* offset 4))
+ (ztree-draw-horizontal-line line-start
+ line-end-leaf
child)))))))
(defun ztree-fill-parent-array (tree)
@@ -340,14 +346,23 @@ apparently shall not be visible"
;; number of 'rows' in tree is last line minus start line
(num-of-items (- (line-number-at-pos (point)) ztree-start-line)))
;; create a parents array to store parents of lines
+ ;; parents array used for navigation with the BS
(setq ztree-parent-lines-array (make-vector num-of-items 0))
- ;; set the root node in lines array
+ ;; set the root node in lines parents array
(ztree-set-parent-for-line ztree-start-line ztree-start-line)
- ;; fill the parent arrray
+ ;; fill the parent arrray from the tree
(ztree-fill-parent-array tree)
- ;; and draw the tree, having the parent array in place
- (ztree-draw-tree tree 0)))
-
+ ;; draw the tree starting with depth 0 and offset 0
+ (ztree-draw-tree tree 0 0)
+ ;; for the 2-sided tree we need to draw the vertical line
+ ;; and an additional tree
+ (if ztree-node-side-fun ; 2-sided tree
+ (let ((width (window-width)))
+ ;; draw the vertical line in the middle of the window
+ (ztree-draw-vertical-line ztree-start-line
+ (1- (+ num-of-items ztree-start-line))
+ (/ width 2))
+ (ztree-draw-tree tree 0 (/ width 2))))))
(defun ztree-insert-node-contents-1 (node depth)
@@ -390,13 +405,15 @@ apparently shall not be visible"
(short-name (funcall ztree-node-short-name-fun node)))
(if ztree-node-side-fun ; 2-sided tree
(let ((right-short-name short-name)
- (side (funcall ztree-node-side-fun node)))
+ (side (funcall ztree-node-side-fun node))
+ (width (window-width)))
(when (eq side 'left) (setq right-short-name ""))
(when (eq side 'right) (setq short-name ""))
(ztree-insert-single-entry short-name depth expandable expanded 0)
- (ztree-insert-single-entry right-short-name depth expandable
expanded 40))
+ (ztree-insert-single-entry right-short-name depth expandable expanded
+ (1+ (/ width 2))))
(ztree-insert-single-entry short-name depth expandable expanded 0))
- (push (cons node line) ztree-node-to-line-list)
+ (push (cons node line) ztree-node-to-line-list)
(newline)
line))
