B
    CVvgƒ  ã               @   sÒ   d dl mZ d dlmZ d dlmZmZ d dlmZ d dl	m
Z ddlmZ G dd	„ d	ejƒZG d
d„ deƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZdS )é    )Úforms)ÚGDALException)ÚGEOSExceptionÚGEOSGeometry)ÚValidationError)Úgettext_lazyé   )ÚOpenLayersWidgetc                   sj   e Zd ZdZeZdZedƒedƒedƒedƒdœZddd	œ‡ fd
d„
Z	dd„ Z
‡ fdd„Zdd„ Z‡  ZS )ÚGeometryFieldzÕ
    This is the basic form field for a Geometry.  Any textual input that is
    accepted by GEOSGeometry is accepted by this form.  By default,
    this includes WKT, HEXEWKB, WKB (in a buffer), and GeoJSON.
    ÚGEOMETRYzNo geometry value provided.zInvalid geometry value.zInvalid geometry type.zXAn error occurred when transforming the geometry to the SRID of the geometry form field.)ÚrequiredÚinvalid_geomÚinvalid_geom_typeÚtransform_errorN)ÚsridÚ	geom_typec               s4   || _ |d k	r|| _tƒ jf |Ž | j| jjd< d S )Nr   )r   r   ÚsuperÚ__init__ÚwidgetÚattrs)Úselfr   r   Úkwargs)Ú	__class__© úC/tmp/pip-install-o3oxmrkh/Django/django/contrib/gis/forms/fields.pyr      s
    zGeometryField.__init__c          
   C   sÒ   || j krdS t|tƒs–t| jdƒrPy| j |¡}W q| tk
rL   d}Y q|X n,yt|ƒ}W n ttt	fk
rz   d}Y nX |dkr–t
| jd dd�‚|jsÎy| jj|_W n" tk
rÌ   | jrÈ| j|_Y nX |S )z)Transform the value to a Geometry object.NÚdeserializer   )Úcode)Zempty_valuesÚ
isinstancer   Úhasattrr   r   r   r   Ú
ValueErrorÚ	TypeErrorr   Úerror_messagesr   Zmap_sridÚAttributeError)r   Úvaluer   r   r   Ú	to_python"   s*    


zGeometryField.to_pythonc                s    t ƒ  |¡}|dkr|S t|jƒ ¡ | jkrH| jdkrHt| jd dd�‚| jrœ| jdkrœ| j|jkrœy| | j¡ W n& t	k
rš   t| jd dd�‚Y nX |S )z¿
        Validate that the input value can be converted to a Geometry object
        and return it. Raise a ValidationError if the value cannot be
        instantiated as a Geometry.
        Nr   r   )r   éÿÿÿÿr   )
r   ÚcleanÚstrr   Úupperr   r!   r   Ú	transformr   )r   r#   Zgeom)r   r   r   r&   >   s    zGeometryField.cleanc             C   sf   y|   |¡}|   |¡}W n tk
r,   dS X |rR|rR| |j¡ |j|dd� S t|ƒt|ƒkS dS )z: Compare geographic value of data with its initial value. Tg�íµ ÷Æ°>)Z	toleranceN)r$   r   r)   r   Zequals_exactÚbool)r   ÚinitialÚdatar   r   r   Úhas_changedW   s    
zGeometryField.has_changed)Ú__name__Ú
__module__Ú__qualname__Ú__doc__r	   r   r   Ú_Zdefault_error_messagesr   r$   r&   r-   Ú__classcell__r   r   )r   r   r
   
   s   r
   c               @   s   e Zd ZdZdS )ÚGeometryCollectionFieldZGEOMETRYCOLLECTIONN)r.   r/   r0   r   r   r   r   r   r4   l   s   r4   c               @   s   e Zd ZdZdS )Ú
PointFieldZPOINTN)r.   r/   r0   r   r   r   r   r   r5   p   s   r5   c               @   s   e Zd ZdZdS )ÚMultiPointFieldZ
MULTIPOINTN)r.   r/   r0   r   r   r   r   r   r6   t   s   r6   c               @   s   e Zd ZdZdS )ÚLineStringFieldZ
LINESTRINGN)r.   r/   r0   r   r   r   r   r   r7   x   s   r7   c               @   s   e Zd ZdZdS )ÚMultiLineStringFieldZMULTILINESTRINGN)r.   r/   r0   r   r   r   r   r   r8   |   s   r8   c               @   s   e Zd ZdZdS )ÚPolygonFieldZPOLYGONN)r.   r/   r0   r   r   r   r   r   r9   €   s   r9   c               @   s   e Zd ZdZdS )ÚMultiPolygonFieldZMULTIPOLYGONN)r.   r/   r0   r   r   r   r   r   r:   „   s   r:   N)Zdjangor   Zdjango.contrib.gis.gdalr   Zdjango.contrib.gis.geosr   r   Zdjango.core.exceptionsr   Zdjango.utils.translationr   r2   Zwidgetsr	   ZFieldr
   r4   r5   r6   r7   r8   r9   r:   r   r   r   r   Ú<module>   s   b