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U ��dZ�< � @ s� d dl mZmZ d dlZd dlmZ G dd� de�ZG dd� dej�Z G dd � d e �Z G d d � d e �Z G d d � d ej �ZG dd� dej�ZdS )� )�division�print_functionN)�SelectableIconc @ s e Zd ZdS )�TreeWidgetErrorN)�__name__� __module__� __qualname__� r r �1/usr/lib/python3/dist-packages/urwid/treetools.pyr & s r c @ s� e Zd ZdZdZedd�Zedd�Zdd� Zdd � Z d d � Z d d � Z dd� Z dd� Z dd� Zdd� Zdd� Zdd� Zdd� Zd d � Zd d � Zd d!� Zd"d#� Zd$S )%� TreeWidgetz9A widget representing something in a nested tree display.� �+r �-c C s8 || _ d | _t|d� | _d| _| �� }| j�|� d S )N�get_first_childT)�_node� _innerwidget�hasattr�is_leaf�expanded�get_indented_widget�_TreeWidget__super�__init__)�self�node�widgetr r r r 0 s zTreeWidget.__init__c C s | j S )zS Allow selection of non-leaf nodes so children may be (un)expanded )r �r r r r � selectable8 s zTreeWidget.selectablec C sL | � � }| js4tjdd| j| jg| j f|gdd�}| �� }tj|d|d�S )NZfixed� )Z dividechars)�relative�d )�width�left) �get_inner_widgetr �urwidZColumns�unexpanded_icon� expanded_iconr �get_indent_colsZPadding)r r � indent_colsr r r r > s ��� �z TreeWidget.get_indented_widgetc C s | j | jg| j | jjjd< dS )z-Update display widget text for parent widgetsr N)r$ r% r �_wZ base_widgetZ widget_listr r r r �update_expanded_iconH s ��z TreeWidget.update_expanded_iconc C s | j | �� �� S �N)r' �get_node� get_depthr r r r r& N s zTreeWidget.get_indent_colsc C s | j d kr| �� | _ | j S r* )r �load_inner_widgetr r r r r" Q s zTreeWidget.get_inner_widgetc C s t �| �� �S r* )r# ZText�get_display_textr r r r r- V s z TreeWidget.load_inner_widgetc C s | j S r* )r r r r r r+ Y s zTreeWidget.get_nodec C s | � � �� d t| � � �� � S )Nz: )r+ �get_key�str� get_valuer r r r r. \ s �zTreeWidget.get_display_textc C s~ | � � }|dk r|S | �� }|�� }|�� }|dkrf|dkrf|�� }|�� }|d8 }||�� ks,t�q,|dkrrdS |�� S dS )z5Return the next TreeWidget depth first from this one.Nr r )� first_childr+ � next_siblingr, � get_parent�AssertionError� get_widget)r Z firstchild�thisnodeZnextnode�depthr r r � next_inorder` s zTreeWidget.next_inorderc C sp | j }|�� }|dk r8|�� }|�� }|dkr2|S |S n4|�� }|dkrT|dkrTdS |dkrd|�� }|�� S dS )z9Return the previous TreeWidget depth first from this one.Nr )r � prev_siblingr6 � last_childr, r4 )r r7 ZprevnodeZ prevwidget� lastchildr8 r r r � prev_inorderw s zTreeWidget.prev_inorderc C sZ | j r |S |dkr"d| _| �� n4|dkr:d| _| �� n | j�� rR| j�||�S |S dS )z2Handle expand & collapse requests (non-leaf nodes))r �rightTr FN)r r r) r( r r �keypress�r �size�keyr r r r? � s zTreeWidget.keypressc C sH | j s|dks|dkrdS |dkrD|| �� krD| j | _| �� dS dS )Nz mouse pressr Fr T)r r& r r) )r rA ZeventZbutton�col�row�focusr r r � mouse_event� s zTreeWidget.mouse_eventc C s4 | j s | jsdS | j�� r,| j�� }|�� S dS dS )z Return first child if expanded.N)r r r � has_childrenr r6 )r Z firstnoder r r r2 � s zTreeWidget.first_childc C sJ | j s | jsdS | j�� r*| j�� �� }ndS |�� }|dkrB|S |S dS )z Return last child if expanded.N)r r r rG �get_last_childr6 r; )r r< Zlastdescendantr r r r; � s zTreeWidget.last_childN)r r r �__doc__r' r r$ r% r r r r) r& r" r- r+ r. r9 r= r? rF r2 r; r r r r r * s& r c @ s� e Zd ZdZd"dd�Zd#dd�Zdd � Zd d � Zd d � Zdd� Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� Zd d � Zd d � Zd d!� ZdS )$�TreeNodea: Store tree contents and cache TreeWidget objects. A TreeNode consists of the following elements: * key: accessor token for parent nodes * value: subclass-specific data * parent: a TreeNode which contains a pointer back to this object * widget: The widget used to render the object Nc C s" || _ || _|| _|| _d | _d S r* )�_key�_parent�_value�_depth�_widget�r �value�parentrB r8 r r r r � s zTreeNode.__init__Fc C s" | j dks|dkr | �� | _ | j S )z! Return the widget for this node.NT)rO � load_widget�r �reloadr r r r6 � s zTreeNode.get_widgetc C s t | �S r* )r r r r r rS � s zTreeNode.load_widgetc C s< | j d kr | jd kr d| _ n| j d kr6| j�� d | _ | j S )Nr r )rN rL r, r r r r r, � s zTreeNode.get_depthc C s. | � � dkrd S | �� }| �� }|�|�S d S �Nr )r, r/ r4 �get_child_index)r rB rR r r r � get_index� s zTreeNode.get_indexc C s | j S r* �rK r r r r r/ � s zTreeNode.get_keyc C s || _ d S r* rY �r rB r r r �set_key� s zTreeNode.set_keyc C s | � � �| j|� d S r* )r4 �change_child_keyrK rZ r r r � change_key� s zTreeNode.change_keyc C s& | j d kr | �� dkr | �� | _ | j S rV )rL r, � load_parentr r r r r4 � s zTreeNode.get_parentc C s t d��dS )z�Provide TreeNode with a parent for the current node. This function is only required if the tree was instantiated from a child node (virtual function)�(virtual function. Implement in subclassN�r r r r r r^ � s zTreeNode.load_parentc C s | j S r* )rM r r r r r1 s zTreeNode.get_valuec C s | � � dkS rV )r, r r r r �is_root s zTreeNode.is_rootc C s& | � � dkr | �� �| �� �S d S d S rV )r, r4 � next_childr/ r r r r r3 s zTreeNode.next_siblingc C s& | � � dkr | �� �| �� �S d S d S rV )r, r4 � prev_childr/ r r r r r: s zTreeNode.prev_siblingc C s | }|� � d k r|� � }q|S r* )r4 )r �rootr r r �get_root s zTreeNode.get_root)NNN)F)r r r rI r r6 rS r, rX r/ r[ r] r4 r^ r1 ra r3 r: re r r r r rJ � s rJ c @ s� e Zd ZdZd dd�Zd!dd�Zdd � Zd d � Zd"d d �Zdd� Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� Zd d � Zd d � ZdS )#� ParentNodez"Maintain sort order for TreeNodes.Nc C s$ t j| ||||d� d | _i | _d S )N)rR rB r8 )rJ r � _child_keys� _childrenrP r r r r s zParentNode.__init__Fc C s" | j dks|dkr | �� | _ | j S )z,Return a possibly ordered list of child keysNT)rg �load_child_keysrT r r r �get_child_keys! s zParentNode.get_child_keysc C s t d��dS )zPProvide ParentNode with an ordered list of child keys (virtual function)r_ Nr` r r r r ri ' s zParentNode.load_child_keysc C s | � |�}|�� S )z8Return the widget for a given key. Create if necessary.)�get_child_noder6 )r rB Zchildr r r �get_child_widget, s zParentNode.get_child_widgetc C s, || j ks|dkr"| �|�| j |< | j | S )z<Return the child node for a given key. Create if necessary.T)rh �load_child_node)r rB rU r r r rk 2 s zParentNode.get_child_nodec C s t d��dS )z6Load the child node for a given key (virtual function)r_ Nr` rZ r r r rm 8 s zParentNode.load_child_nodec C s || j |< dS )z]Set the child node for a given key. Useful for bottom-up, lazy population of a tree.N)rh )r rB r r r r �set_child_node< s zParentNode.set_child_nodec C s< || j krtd| ��| j �|�| j |< | j | �|� d S )Nz%s is already in use)rh r �popr[ )r ZoldkeyZnewkeyr r r r\ A s zParentNode.change_child_keyc C sL z| � � �|�W S tk rF d}t||| �� t| � � �f ��Y nX d S )Nz7Can't find key %s in ParentNode %s ParentNode items: %s)rj �index� ValueErrorr r/ r0 )r rB Z errorstringr r r rW G s �zParentNode.get_child_indexc C sH | � |�}|dkrdS |d7 }| �� }|t|�k r@| �|| �S dS dS )z=Return the next child node in index order from the given key.Nr )rW rj �lenrk �r rB rp � child_keysr r r rb P s zParentNode.next_childc C sD | � |�}|dkrdS | �� }|d8 }|dkr<| �|| �S dS dS )zAReturn the previous child node in index order from the given key.Nr r )rW rj rk rs r r r rc ` s zParentNode.prev_childc C s | � � }| �|d �S )z+Return the first TreeNode in the directory.r �rj rk �r rt r r r r o s zParentNode.get_first_childc C s | � � }| �|d �S )z*Return the last TreeNode in the directory.���ru rv r r r rH t s zParentNode.get_last_childc C s t | �� �dkS )z!Does this node have any children?r )rr rj r r r r rG y s zParentNode.has_children)NNN)F)F)r r r rI r rj ri rl rk rm rn r\ rW rb rc r rH rG r r r r rf s rf c @ s8 e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd S ) � TreeWalkerzTListWalker-compatible class for displaying TreeWidgets positions are TreeNodes.c C s || _ dS )z,start_from: TreeNode with the initial focus.N)rE )r � start_fromr r r r � s zTreeWalker.__init__c C s | j �� }|| j fS r* )rE r6 )r r r r r � get_focus� s zTreeWalker.get_focusc C s || _ | �� d S r* )rE Z _modified)r rE r r r � set_focus� s zTreeWalker.set_focusc C s, |� � }|�� }|d kr dS ||�� fS d S �N)NN)r6 r9 r+ �r ry r �targetr r r �get_next� s zTreeWalker.get_nextc C s, |� � }|�� }|d kr dS ||�� fS d S r| )r6 r= r+ r} r r r �get_prev� s zTreeWalker.get_prevN) r r r rI r rz r{ r r� r r r r rx ~ s rx c @ s@ e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dS )� TreeListBoxzPA ListBox with special handling for navigation and collapsing of TreeWidgetsc C s | j �||�}| �||�S r* )Z_TreeListBox__superr? �unhandled_inputr@ r r r r? � s zTreeListBox.keypressc C sX |dkr| � |� n@|dkr(| �|� n,|dkr<| �|� n|dkrP| �|� n|S dS )z Handle macro-navigation keysr! r �home�endN)�move_focus_to_parent�collapse_focus_parent� focus_home� focus_end)r rA �inputr r r r� � s zTreeListBox.unhandled_inputc C s> | j �� \}}| �|� | j �� \}}||kr:| �|d� dS )zCollapse parent directory.r N)�bodyrz r� r? )r rA r �posZpwidgetZpposr r r r� � s z!TreeListBox.collapse_focus_parentc C s� | j �� \}}|�� }|dkr"dS | �|�\}}}|\}} } } } |\} }|D ].\}}}||8 }||krL| �|||� dS qL| �||�� � dS )z(Move focus to parent of widget in focus.N)r� rz r4 Zcalculate_visible� change_focus)r rA r r� � parentposZmiddle�topZbottom� row_offsetZ focus_widgetZ focus_posZ focus_rowsZcursorZtrim_topZ fill_aboveZrowsr r r r� � s z TreeListBox.move_focus_to_parentc C s& | j �� \}}|�� }| �||� dS )zMove focus to very top.N)r� rz re r� )r rA r r� �rootnoder r r r� � s zTreeListBox.focus_homec C sL |\}}| j �� \}}|�� }|�� }|�� }|�� } | �|| |d � dS )zMove focus to far bottom.r N)r� rz re r6 r; r+ r� ) r rA ZmaxrowZmaxcolr r� r� Z rootwidgetZ lastwidgetZlastnoder r r r� � s zTreeListBox.focus_endN) r r r rI r? r� r� r� r� r� r r r r r� � s r� )Z __future__r r r# Z urwid.wimpr � RuntimeErrorr Z WidgetWrapr �objectrJ rf Z ListWalkerrx ZListBoxr� r r r r �<module> s Ue"
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