root/galaxy-central/lib/galaxy/web/form_builder.py @ 2

"""
Classes for generating HTML forms
"""

import logging,sys
from cgi import escape
from galaxy.util import restore_text

log = logging.getLogger(__name__)

class BaseField(object):
    def get_html( self, prefix="" ):
        """Returns the html widget corresponding to the parameter"""
        raise TypeError( "Abstract Method" )
    def get_disabled_str( self, disabled=False ):
        if disabled:
            return ' disabled="disabled"'
        else:
            return ''
    @staticmethod
    def form_field_types():
        return ['TextField', 'TextArea', 'SelectField', 'CheckboxField', 'AddressField', 'WorkflowField']
    @staticmethod
    def sample_field_types():
        return ['TextField', 'SelectField', 'CheckboxField', 'WorkflowField']

class TextField(BaseField):
    """
    A standard text input box.
    
    >>> print TextField( "foo" ).get_html()
    <input type="text" name="foo" size="10" value="">
    >>> print TextField( "bins", size=4, value="default" ).get_html()
    <input type="text" name="bins" size="4" value="default">
    """
    def __init__( self, name, size=None, value=None ):
        self.name = name
        self.size = int( size or 10 )
        self.value = value or ""
    def get_html( self, prefix="", disabled=False ):
        return '<input type="text" name="%s%s" size="%d" value="%s"%s>' \
            % ( prefix, self.name, self.size, escape( str( self.value ),  quote=True ), self.get_disabled_str( disabled ) )
    def set_size(self, size):
        self.size = int( size )
        
class PasswordField(BaseField):
    """
    A password input box. text appears as "******"
    
    >>> print PasswordField( "foo" ).get_html()
    <input type="password" name="foo" size="10" value="">
    >>> print PasswordField( "bins", size=4, value="default" ).get_html()
    <input type="password" name="bins" size="4" value="default">
    """
    def __init__( self, name, size=None, value=None ):
        self.name = name
        self.size = int( size or 10 )
        self.value = value or ""
    def get_html( self, prefix="" ):
        return '<input type="password" name="%s%s" size="%d" value="%s">' \
            % ( prefix, self.name, self.size, escape( str( self.value ), quote=True ) )
    def set_size(self, size):
        self.size = int( size )

class TextArea(BaseField):
    """
    A standard text area box.
    
    >>> print TextArea( "foo" ).get_html()
    <textarea name="foo" rows="5" cols="25"></textarea>
    >>> print TextArea( "bins", size="4x5", value="default" ).get_html()
    <textarea name="bins" rows="4" cols="5">default</textarea>
    """
    def __init__( self, name, size="5x25", value=None ):
        self.name = name
        self.size = size.split("x")
        self.rows = int(self.size[0])
        self.cols = int(self.size[-1])
        self.value = value or ""
    def get_html( self, prefix="", disabled=False ):
        return '<textarea name="%s%s" rows="%d" cols="%d"%s>%s</textarea>' \
            % ( prefix, self.name, self.rows, self.cols, self.get_disabled_str( disabled ), escape( str( self.value ), quote=True ) )
    def set_size(self, rows, cols):
        self.rows = rows
        self.cols = cols

class CheckboxField(BaseField):
    """
    A checkbox (boolean input)
    
    >>> print CheckboxField( "foo" ).get_html()
    <input type="checkbox" name="foo" value="true" ><input type="hidden" name="foo" value="true">
    >>> print CheckboxField( "bar", checked="yes" ).get_html()
    <input type="checkbox" name="bar" value="true" checked><input type="hidden" name="bar" value="true">
    """
    def __init__( self, name, checked=None ):
        self.name = name
        self.checked = ( checked == True ) or ( isinstance( checked, basestring ) and ( checked.lower() in ( "yes", "true", "on" ) ) )
    def get_html( self, prefix="", disabled=False ):
        if self.checked:
            checked_text = "checked"
        else:
            checked_text = ""
        # The hidden field is necessary because if the check box is not checked on the form, it will
        # not be included in the request params.  The hidden field ensure that this will happen.  When
        # parsing the request, the value 'true' in the hidden field actually means it is NOT checked.
        # See the is_checked() method below.  The prefix is necessary in each case to ensure functional
        # correctness when the param is inside a conditional.
        return '<input type="checkbox" name="%s%s" value="true" %s%s><input type="hidden" name="%s%s" value="true"%s>' \
            % ( prefix, self.name, checked_text, self.get_disabled_str( disabled ), prefix, self.name, self.get_disabled_str( disabled ) )
    @staticmethod
    def is_checked( value ):
        if value == True:
            return True
        # This may look strange upon initial inspection, but see the comments in the get_html() method
        # above for clarification.  Basically, if value is not True, then it will always be a list with
        # 2 input fields ( a checkbox and a hidden field ) if the checkbox is checked.  If it is not
        # checked, then value will be only the hidden field.
        return isinstance( value, list ) and len( value ) == 2
    def set_checked(self, value):
        if isinstance( value, basestring ):
            self.checked = value.lower() in [ "yes", "true", "on" ]
        else:
            self.checked = value

class FileField(BaseField):
    """
    A file upload input.
    
    >>> print FileField( "foo" ).get_html()
    <input type="file" name="foo">
    >>> print FileField( "foo", ajax = True ).get_html()
    <input type="file" name="foo" galaxy-ajax-upload="true">
    """
    def __init__( self, name, value = None, ajax=False ):
        self.name = name
        self.ajax = ajax
        self.value = value
    def get_html( self, prefix="" ):
        value_text = ""
        if self.value:
            value_text = ' value="%s"' % self.value
        ajax_text = ""
        if self.ajax:
            ajax_text = ' galaxy-ajax-upload="true"'
        return '<input type="file" name="%s%s"%s%s>' % ( prefix, self.name, ajax_text, value_text )

class HiddenField(BaseField):
    """
    A hidden field.
    
    >>> print HiddenField( "foo", 100 ).get_html()
    <input type="hidden" name="foo" value="100">
    """
    def __init__( self, name, value=None ):
        self.name = name
        self.value = value or ""
    def get_html( self, prefix="" ):
        return '<input type="hidden" name="%s%s" value="%s">' % ( prefix, self.name, escape( str( self.value ), quote=True ) )

class SelectField(BaseField):
    """
    A select field.
    
    >>> t = SelectField( "foo", multiple=True )
    >>> t.add_option( "tuti", 1 )
    >>> t.add_option( "fruity", "x" )
    >>> print t.get_html()
    <select name="foo" multiple>
    <option value="1">tuti</option>
    <option value="x">fruity</option>
    </select>
    
    >>> t = SelectField( "bar" )
    >>> t.add_option( "automatic", 3 )
    >>> t.add_option( "bazooty", 4, selected=True )
    >>> print t.get_html()
    <select name="bar" last_selected_value="4">
    <option value="3">automatic</option>
    <option value="4" selected>bazooty</option>
    </select>
    
    >>> t = SelectField( "foo", display="radio" )
    >>> t.add_option( "tuti", 1 )
    >>> t.add_option( "fruity", "x" )
    >>> print t.get_html()
    <div><input type="radio" name="foo" value="1">tuti</div>
    <div><input type="radio" name="foo" value="x">fruity</div>

    >>> t = SelectField( "bar", multiple=True, display="checkboxes" )
    >>> t.add_option( "automatic", 3 )
    >>> t.add_option( "bazooty", 4, selected=True )
    >>> print t.get_html()
    <div class="checkUncheckAllPlaceholder" checkbox_name="bar"></div>
    <div><input type="checkbox" name="bar" value="3">automatic</div>
    <div><input type="checkbox" name="bar" value="4" checked>bazooty</div>
    """
    def __init__( self, name, multiple=None, display=None, refresh_on_change=False, refresh_on_change_values=[], size=None ):
        self.name = name
        self.multiple = multiple or False
        self.size = size
        self.options = list()
        if display == "checkboxes":
            assert multiple, "Checkbox display only supported for multiple select"
        elif display == "radio":
            assert not( multiple ), "Radio display only supported for single select"
        elif display is not None:
            raise Exception, "Unknown display type: %s" % display
        self.display = display
        self.refresh_on_change = refresh_on_change
        self.refresh_on_change_values = refresh_on_change_values
        if self.refresh_on_change: 
            self.refresh_on_change_text = ' refresh_on_change="true"'
            if self.refresh_on_change_values:
                self.refresh_on_change_text = '%s refresh_on_change_values="%s"' % ( self.refresh_on_change_text, ",".join( self.refresh_on_change_values ) )
        else:
            self.refresh_on_change_text = ''
    def add_option( self, text, value, selected = False ):
        self.options.append( ( text, value, selected ) )
    def get_html( self, prefix="", disabled=False ):
        if self.display == "checkboxes":
            return self.get_html_checkboxes( prefix, disabled )
        elif self.display == "radio":
            return self.get_html_radio( prefix, disabled )
        else:
            return self.get_html_default( prefix, disabled )
    def get_html_checkboxes( self, prefix="", disabled=False ):
        rval = []
        ctr = 0
        if len( self.options ) > 1:
            rval.append ( '<div class="checkUncheckAllPlaceholder" checkbox_name="%s%s"></div>' % ( prefix, self.name ) ) #placeholder for the insertion of the Select All/Unselect All buttons
        for text, value, selected in self.options:
            style = ""
            if len(self.options) > 2 and ctr % 2 == 1:
                style = " class=\"odd_row\""
            if selected:
                rval.append( '<div%s><input type="checkbox" name="%s%s" value="%s" checked%s>%s</div>' % \
                             ( style, prefix, self.name, escape( str( value ), quote=True ), self.get_disabled_str( disabled ), text ) )
            else:
                rval.append( '<div%s><input type="checkbox" name="%s%s" value="%s"%s>%s</div>' % \
                             ( style, prefix, self.name, escape( str( value ), quote=True ), self.get_disabled_str( disabled ), text ) )
            ctr += 1
        return "\n".join( rval )
    def get_html_radio( self, prefix="", disabled=False ):
        rval = []
        ctr = 0
        for text, value, selected in self.options:
            style = ""
            if len(self.options) > 2 and ctr % 2 == 1:
                style = " class=\"odd_row\""
            if selected: selected_text = " checked"
            else: selected_text = ""
            rval.append( '<div%s><input type="radio" name="%s%s"%s value="%s"%s%s>%s</div>' % \
                         ( style,
                           prefix,
                           self.name,
                           self.refresh_on_change_text,
                           escape( str( value ), quote=True ),
                           selected_text,
                           self.get_disabled_str( disabled ),
                           text ) )
            ctr += 1
        return "\n".join( rval )    
    def get_html_default( self, prefix="", disabled=False ):
        if self.multiple:
            multiple = " multiple"
        else:
            multiple = ""
        if self.size:
            size = ' size="%s"' % str( self.size )
        else:
            size = ''
        rval = []
        last_selected_value = ""
        for text, value, selected in self.options:
            if selected:
                selected_text = " selected"
                last_selected_value = value
            else:
                selected_text = ""
            rval.append( '<option value="%s"%s>%s</option>' % ( escape( str( value ), quote=True ), selected_text, text ) )
        if last_selected_value:
            last_selected_value = ' last_selected_value="%s"' % escape( str( last_selected_value ), quote=True )
        rval.insert( 0, '<select name="%s%s"%s%s%s%s%s>' % \
                     ( prefix, self.name, multiple, size, self.refresh_on_change_text, last_selected_value, self.get_disabled_str( disabled ) ) )
        rval.append( '</select>' )
        return "\n".join( rval )
    def get_selected( self, return_label=False, return_value=False, multi=False ):
        '''
        Return the currently selected option's label, value or both as a tuple.  For
        multi-select lists, a list is returned.
        '''
        if multi:
            selected_options = []
        for label, value, selected in self.options:
            if selected:
                if return_label and return_value:
                    if multi:
                        selected_options.append( ( label, value ) )
                    else:
                        return ( label, value )
                elif return_label:
                    if multi:
                        selected_options.append( label )
                    else:
                        return label
                elif return_value:
                    if multi:
                        selected_options.append( value )
                    else:
                        return value
        if multi:
            return selected_options
        return None

class DrillDownField( BaseField ):
    """
    A hierarchical select field, which allows users to 'drill down' a tree-like set of options.
    
    >>> t = DrillDownField( "foo", multiple=True, display="checkbox", options=[{'name': 'Heading 1', 'value': 'heading1', 'options': [{'name': 'Option 1', 'value': 'option1', 'options': []}, {'name': 'Option 2', 'value': 'option2', 'options': []}, {'name': 'Heading 1', 'value': 'heading1', 'options': [{'name': 'Option 3', 'value': 'option3', 'options': []}, {'name': 'Option 4', 'value': 'option4', 'options': []}]}]}, {'name': 'Option 5', 'value': 'option5', 'options': []}] )
    >>> print t.get_html()
    <div><ul class="toolParameterExpandableCollapsable">
    <li><span class="toolParameterExpandableCollapsable">[+]</span><input type="checkbox" name="foo" value="heading1"">Heading 1
    <ul class="toolParameterExpandableCollapsable" default_state="collapsed">
    <li><input type="checkbox" name="foo" value="option1"">Option 1
    </li>
    <li><input type="checkbox" name="foo" value="option2"">Option 2
    </li>
    <li><span class="toolParameterExpandableCollapsable">[+]</span><input type="checkbox" name="foo" value="heading1"">Heading 1
    <ul class="toolParameterExpandableCollapsable" default_state="collapsed">
    <li><input type="checkbox" name="foo" value="option3"">Option 3
    </li>
    <li><input type="checkbox" name="foo" value="option4"">Option 4
    </li>
    </ul>
    </li>
    </ul>
    </li>
    <li><input type="checkbox" name="foo" value="option5"">Option 5
    </li>
    </ul></div>
    >>> t = DrillDownField( "foo", multiple=False, display="radio", options=[{'name': 'Heading 1', 'value': 'heading1', 'options': [{'name': 'Option 1', 'value': 'option1', 'options': []}, {'name': 'Option 2', 'value': 'option2', 'options': []}, {'name': 'Heading 1', 'value': 'heading1', 'options': [{'name': 'Option 3', 'value': 'option3', 'options': []}, {'name': 'Option 4', 'value': 'option4', 'options': []}]}]}, {'name': 'Option 5', 'value': 'option5', 'options': []}] )
    >>> print t.get_html()
    <div><ul class="toolParameterExpandableCollapsable">
    <li><span class="toolParameterExpandableCollapsable">[+]</span><input type="radio" name="foo" value="heading1"">Heading 1
    <ul class="toolParameterExpandableCollapsable" default_state="collapsed">
    <li><input type="radio" name="foo" value="option1"">Option 1
    </li>
    <li><input type="radio" name="foo" value="option2"">Option 2
    </li>
    <li><span class="toolParameterExpandableCollapsable">[+]</span><input type="radio" name="foo" value="heading1"">Heading 1
    <ul class="toolParameterExpandableCollapsable" default_state="collapsed">
    <li><input type="radio" name="foo" value="option3"">Option 3
    </li>
    <li><input type="radio" name="foo" value="option4"">Option 4
    </li>
    </ul>
    </li>
    </ul>
    </li>
    <li><input type="radio" name="foo" value="option5"">Option 5
    </li>
    </ul></div>
    """
    def __init__( self, name, multiple=None, display=None, refresh_on_change=False, options = [], value = [], refresh_on_change_values = [] ):
        self.name = name
        self.multiple = multiple or False
        self.options = options
        if value and not isinstance( value, list ):
            value = [ value ]
        else:
            value = []
        self.value = value
        if display == "checkbox":
            assert multiple, "Checkbox display only supported for multiple select"
        elif display == "radio":
            assert not( multiple ), "Radio display only supported for single select"
        else:
            raise Exception, "Unknown display type: %s" % display
        self.display = display
        self.refresh_on_change = refresh_on_change
        self.refresh_on_change_values = refresh_on_change_values
        if self.refresh_on_change: 
            self.refresh_on_change_text = ' refresh_on_change="true"'
            if self.refresh_on_change_values:
                self.refresh_on_change_text = '%s refresh_on_change_values="%s"' % ( self.refresh_on_change_text, ",".join( self.refresh_on_change_values ) )
        else:
            self.refresh_on_change_text = ''
    def get_html( self, prefix="" ):
        def find_expanded_options( expanded_options, options, parent_options = [] ):
            for option in options:
                if option['value'] in self.value:
                    expanded_options.extend( parent_options )
                if option['options']:
                    new_parents = list( parent_options ) + [ option['value'] ]
                    find_expanded_options( expanded_options, option['options'], new_parents )
        def recurse_options( html, options, expanded_options = [] ):
            for option in options:
                selected = ( option['value'] in self.value )
                if selected: selected = ' checked'
                else: selected = ''
                if option['options']:
                    default_state = 'collapsed'
                    default_icon = '[+]'
                    if option['value'] in expanded_options:
                        default_state = 'expanded'
                        default_icon = '[-]'
                    html.append( '<li><span class="toolParameterExpandableCollapsable">%s</span><input type="%s" name="%s%s" value="%s"%s">%s' % ( default_icon, self.display, prefix, self.name, escape(str(option['value']), quote=True), selected, option['name']) )
                    html.append( '<ul class="toolParameterExpandableCollapsable" default_state="%s">' % default_state )
                    recurse_options( html, option['options'], expanded_options )
                    html.append( '</ul>')
                else:
                    html.append( '<li><input type="%s" name="%s%s" value="%s"%s">%s' % ( self.display, prefix, self.name, escape(str(option['value']), quote=True), selected, option['name']) )
                html.append( '</li>' )
        rval = []
        rval.append( '<div><ul class="toolParameterExpandableCollapsable">' )
        expanded_options = []
        find_expanded_options( expanded_options, self.options )
        recurse_options( rval, self.options, expanded_options )
        rval.append( '</ul></div>' )
        return '\n'.join( rval )
    
class AddressField(BaseField):
    @staticmethod
    def fields():
        return   [  ( "short_desc", "Short address description", "Required" ),
                    ( "name", "Name", "Required" ),
                    ( "institution", "Institution", "Required" ),
                    ( "address", "Address", "Required" ),
                    ( "city", "City", "Required" ),
                    ( "state", "State/Province/Region", "Required" ),
                    ( "postal_code", "Postal Code", "Required" ),
                    ( "country", "Country", "Required" ),
                    ( "phone", "Phone", "" )  ]
    def __init__(self, name, user=None, value=None, params=None):
        self.name = name
        self.user = user
        self.value = value
        self.select_address = None
        self.params = params
    def get_html( self, disabled=False ):
        address_html = ''
        add_ids = ['none']
        if self.user:
            for a in self.user.addresses:
                add_ids.append( str( a.id ) )
        add_ids.append( 'new' )
        self.select_address = SelectField( self.name, 
                                           refresh_on_change=True, 
                                           refresh_on_change_values=add_ids )
        if self.value == 'none':
            self.select_address.add_option( 'Select one', 'none', selected=True )
        else:
            self.select_address.add_option( 'Select one', 'none' )
        if self.user:
            for a in self.user.addresses:
                if not a.deleted:
                    if self.value == str( a.id ):
                        self.select_address.add_option( a.desc, str( a.id ), selected=True )
                        # Display this address
                        address_html += '''
                                        <div class="form-row">
                                            %s
                                        </div>
                                        ''' % a.get_html()
                    else:
                        self.select_address.add_option( a.desc, str( a.id ) )
        if self.value == 'new':
            self.select_address.add_option( 'Add a new address', 'new', selected=True )
            for field_name, label, help_text in self.fields():
                add_field = TextField( self.name + '_' + field_name, 
                                      40,
                                      restore_text( self.params.get( self.name + '_' + field_name, ''  ) ) ) 
                address_html += '''
                                <div class="form-row">
                                    <label>%s</label>
                                    %s
                                    ''' % ( label, add_field.get_html( disabled=disabled ) )
                if help_text:
                    address_html += '''
                                    <div class="toolParamHelp" style="clear: both;">
                                        %s
                                    </div>
                                    ''' % help_text      
                address_html += '''
                                </div>
                                '''
        else:
            self.select_address.add_option( 'Add a new address', 'new' )
        return self.select_address.get_html( disabled=disabled ) + address_html

class WorkflowField(BaseField):
    def __init__(self, name, user=None, value=None, params=None):
        self.name = name
        self.user = user
        self.value = value
        self.select_workflow = None
        self.params = params
    def get_html( self, disabled=False ):
        self.select_workflow = SelectField( self.name )
        if self.value == 'none':
            self.select_workflow.add_option( 'Select one', 'none', selected=True )
        else:
            self.select_workflow.add_option( 'Select one', 'none' )
        if self.user:
            for a in self.user.stored_workflows:
                if not a.deleted:
                    if str( self.value ) == str( a.id ):
                        self.select_workflow.add_option( a.name, str( a.id ), selected=True )
                    else:
                        self.select_workflow.add_option( a.name, str( a.id ) )
        return self.select_workflow.get_html( disabled=disabled )

def get_suite():
    """Get unittest suite for this module"""
    import doctest, sys
    return doctest.DocTestSuite( sys.modules[__name__] )

# --------- Utility methods -----------------------------

def build_select_field( trans, objs, label_attr,  select_field_name, initial_value='none',
                        selected_value='none', refresh_on_change=False, multiple=False, display=None, size=None ):
    """
    Build a SelectField given a set of objects.  The received params are:
    - objs: the set of object used to populate the option list
    - label_attr: the attribute of each obj (e.g., name, email, etc ) whose value is used to populate each option label.  If the string
      'self' is passed as label_attr, each obj in objs is assumed to be a string, so the obj itself is used
    - select_field_name: the name of the SelectField
    - initial_value: the vlaue of the first option in the SelectField - allows for an option telling the user to select something
    - selected_value: the value of the currently selected option
    - refresh_on_change: True if the SelectField should perform a refresh_on_change
    """
    values = [ initial_value ]
    for obj in objs:
        if label_attr == 'self':
            # Each obj is a string
            values.append( obj )
        else:
            values.append( trans.security.encode_id( obj.id ) )
    if refresh_on_change:
        refresh_on_change_values = values
    else:
        refresh_on_change_values = []
    select_field = SelectField( name=select_field_name, 
                                multiple=multiple,
                                display=display,
                                refresh_on_change=refresh_on_change, 
                                refresh_on_change_values=refresh_on_change_values,
                                size=size )
    if display is None:
        # only insert an initial "Select one" option if we are not displaying check boxes or radio buttons
        if selected_value == initial_value:
            select_field.add_option( 'Select one', initial_value, selected=True )
        else:
            select_field.add_option( 'Select one', initial_value )
    for obj in objs:
        if label_attr == 'self':
            # Each obj is a string
            if str( selected_value ) == str( obj ):
                select_field.add_option( obj, obj, selected=True )
            else:
                select_field.add_option( obj, obj )
        else:
            label = getattr( obj, label_attr )
            if str( selected_value ) == str( obj.id ) or str( selected_value ) == trans.security.encode_id( obj.id ):
                select_field.add_option( label, trans.security.encode_id( obj.id ), selected=True )
            else:
                select_field.add_option( label, trans.security.encode_id( obj.id ) )
    return select_field