#**
 * spring.vm
 *
 * This file consists of a collection of Velocity macros aimed at easing
 * some of the common requirements of web applications - in particular
 * handling of forms.
 *
 * Spring's Velocity support will automatically make this file and therefore
 * all macros within it available to any application using Spring's
 * VelocityConfigurer.
 *
 * To take advantage of these macros, the "exposeSpringMacroHelpers" property
 * of the VelocityView class needs to be set to "true". This will expose a
 * RequestContext under the name "springMacroRequestContext", as needed by
 * the macros in this library.
 *
 * @author Darren Davison
 * @author Juergen Hoeller
 * @since 1.1
 *#

#**
 * springMessage
 *
 * Macro to translate a message code into a message.
 *#
#macro( springMessage $code )$springMacroRequestContext.getMessage($code)#end

#**
 * springMessageText
 *
 * Macro to translate a message code into a message,
 * using the given default text if no message found.
 *#
#macro( springMessageText $code $text )$springMacroRequestContext.getMessage($code, $text)#end

#**
 * springTheme
 *
 * Macro to translate a theme message code into a string.
 *#
#macro( springTheme $code )$springMacroRequestContext.getThemeMessage($code)#end

#**
 * springThemeText
 *
 * Macro to translate a theme message code into a string,
 * using the given default text if no message found.
 *#
#macro( springThemeText $code $text )$springMacroRequestContext.getThemeMessage($code, $text)#end

#**
 * springUrl
 *
 * Takes a relative URL and makes it absolute from the server root by
 * adding the context root for the web application.
 *#
#macro( springUrl $relativeUrl )$springMacroRequestContext.getContextPath()${relativeUrl}#end

#**
 * springBind
 *
 * Exposes a BindStatus object for the given bind path, which can be
 * a bean (e.g. "person") to get global errors, or a bean property
 * (e.g. "person.name") to get field errors. Can be called multiple times
 * within a form to bind to multiple command objects and/or field names.
 *
 * This macro will participate in the default HTML escape setting for the given
 * RequestContext. This can be customized by calling "setDefaultHtmlEscape"
 * on the "springMacroRequestContext" context variable, or via the
 * "defaultHtmlEscape" context-param in web.xml (same as for the JSP bind tag).
 * Also regards a "springHtmlEscape" variable in the template context.
 *
 * Producing no output, the following context variable will be available
 * each time this macro is referenced:
 *
 *   $status : a BindStatus instance holding the command object name,
 *   expression, value, and error codes and messages for the path supplied
 *
 * @param $path : the path (string value) of the value required to bind to.
 *   Spring defaults to a command name of "command" but this can be overridden
 *   by user config.
 *#
#macro( springBind $path )
    #if("$!springHtmlEscape" != "")
        #set( $status = $springMacroRequestContext.getBindStatus($path, $springHtmlEscape) )
    #else
        #set( $status = $springMacroRequestContext.getBindStatus($path) )
    #end
#end

#**
 * springBindEscaped
 *
 * Similar to springBind, but takes an explicit HTML escape flag rather
 * than relying on the default HTML escape setting.
 *#
#macro( springBindEscaped $path $htmlEscape )
    #set( $status = $springMacroRequestContext.getBindStatus($path, $htmlEscape) )
#end

#**
 * springFormInput
 *
 * Display a form input field of type 'text' and bind it to an attribute
 * of a command or bean.
 *
 * @param path the name of the field to bind to
 * @param attributes any additional attributes for the element (such as class
 *    or CSS styles or size
 *
 *#
#macro( springFormInput $path $attributes )
    #springBind($path)
    <input type="text" id="${status.expression}" name="${status.expression}" value="$!status.value" ${attributes}#springCloseTag()
#end

#**
 * springFormPasswordInput
 *
 * Display a form input field of type 'password' and bind it to an attribute
 * of a command or bean.  No value will ever be specified for this field regardless
 * of whether one exists or not.  For hopefully obvious reasons!
 *
 * @param path the name of the field to bind to
 * @param attributes any additional attributes for the element (such as class
 *    or CSS styles or size
 *
 *#
#macro( springFormPasswordInput $path $attributes )
    #springBind($path)
    <input type="password" id="${status.expression}" name="${status.expression}" value="" ${attributes}#springCloseTag()
#end

#**
 * springFormHiddenInput
 *
 * Generate a form input field of type 'hidden' and bind it to an attribute
 * of a command or bean.
 *
 * @param path the name of the field to bind to
 * @param attributes any additional attributes for the element (such as class
 *    or CSS styles or size
 *
 *#
#macro( springFormHiddenInput $path $attributes )
    #springBind($path)
    <input type="hidden" id="${status.expression}" name="${status.expression}" value="$!status.value" ${attributes}#springCloseTag()
#end

#**
 * formTextArea
 *
 * display a text area and bind it to an attribute
 * of a command or bean
 *
 * @param path the name of the field to bind to
 * @param attributes any additional attributes for the element (such as class
 *    or CSS styles or size
 *
 *#
#macro( springFormTextarea $path $attributes )
    #springBind($path)
    <textarea id="${status.expression}" name="${status.expression}" ${attributes}>$!status.value</textarea>
#end

#**
 * springFormSingleSelect
 *
 * Show a selectbox (dropdown) input element allowing a single value to be chosen
 * from a list of options.
 *
 * The null check for $status.value leverages Velocity's 'quiet' notation rather
 * than the more common #if($status.value) since this method evaluates to the
 * boolean 'false' if the content of $status.value is the String "false" - not
 * what we want.
 *
 * @param path the name of the field to bind to
 * @param options a map (value=label) of all the available options
 * @param attributes any additional attributes for the element (such as class
 *    or CSS styles or size
*#
#macro( springFormSingleSelect $path $options $attributes )
    #springBind($path)
    <select id="${status.expression}" name="${status.expression}" ${attributes}>
        #foreach($option in $options.keySet())
            <option value="${option}"
            #if("$!status.value" == "$option")
                selected="selected"
            #end>
            ${options.get($option)}</option>
        #end
    </select>
#end

#**
 * springFormMultiSelect
 *
 * Show a listbox of options allowing the user to make 0 or more choices from
 * the list of options.
 *
 * @param path the name of the field to bind to
 * @param options a map (value=label) of all the available options
 * @param attributes any additional attributes for the element (such as class
 *    or CSS styles or size
*#
#macro( springFormMultiSelect $path $options $attributes )
    #springBind($path)
    <select multiple="multiple" id="${status.expression}" name="${status.expression}" ${attributes}>
        #foreach($option in $options.keySet())
            <option value="${option}"
            #foreach($item in $status.value)
                #if($item == $option)
                    selected="selected"
                #end
            #end
            >${options.get($option)}</option>
        #end
    </select>
#end

#**
 * springFormRadioButtons
 *
 * Show radio buttons.
 *
 * @param path the name of the field to bind to
 * @param options a map (value=label) of all the available options
 * @param separator the html tag or other character list that should be used to
 *    separate each option.  Typically '&nbsp;' or '<br>'
 * @param attributes any additional attributes for the element (such as class
 *    or CSS styles or size
*#
#macro( springFormRadioButtons $path $options $separator $attributes )
    #springBind($path)
    #foreach($option in $options.keySet())
        <input type="radio" name="${status.expression}" value="${option}"
        #if("$!status.value" == "$option")
            checked="checked"
        #end
        ${attributes}
        #springCloseTag()
        ${options.get($option)} ${separator}
    #end
#end

#**
 * springFormCheckboxes
 *
 * Show checkboxes.
 *
 * @param path the name of the field to bind to
 * @param options a map (value=label) of all the available options
 * @param separator the html tag or other character list that should be used to
 *    separate each option.  Typically '&nbsp;' or '<br>'
 * @param attributes any additional attributes for the element (such as class
 *    or CSS styles or size
*#
#macro( springFormCheckboxes $path $options $separator $attributes )
    #springBind($path)
    #foreach($option in $options.keySet())
        <input type="checkbox" name="${status.expression}" value="${option}" 
        #foreach($item in $status.value) 
            #if($item == $option) checked="checked" #end 
        #end
        ${attributes} #springCloseTag()
        ${options.get($option)} ${separator}
    #end
    <input type="hidden" name="_${status.expression}" value="on"/>
#end

#**
 * springFormCheckbox
 *
 * Show a single checkbox.
 *
 * @param path the name of the field to bind to
 * @param attributes any additional attributes for the element (such as class
 *    or CSS styles or size
*#
#macro( springFormCheckbox $path $attributes )
    #springBind($path)
    <input type="hidden" name="_${status.expression}" value="on"/>
    <input type="checkbox" id="${status.expression}" name="${status.expression}"#if("$!{status.value}"=="true") checked="checked"#end ${attributes}/>
#end

#**
 * springShowErrors
 *
 * Show validation errors for the currently bound field, with
 * optional style attributes.
 *
 * @param separator the html tag or other character list that should be used to
 *    separate each option. Typically '<br>'.
 * @param classOrStyle either the name of a CSS class element (which is defined in
 *    the template or an external CSS file) or an inline style. If the value passed in here
 *    contains a colon (:) then a 'style=' attribute will be used, else a 'class=' attribute
 *    will be used.
*#
#macro( springShowErrors $separator $classOrStyle )
    #foreach($error in $status.errorMessages)
        #if($classOrStyle == "")
            <b>${error}</b>
        #else
            #if($classOrStyle.indexOf(":") == -1)
                #set($attr="class")
            #else
                #set($attr="style")
            #end
            <span ${attr}="${classOrStyle}">${error}</span>
        #end
        ${separator}
    #end
#end

#**
 * springCloseTag
 *
 * Simple macro to close an HTML tag that has no body with '>' or '/>',
 * depending on the value of a 'springXhtmlCompliant' variable in the
 * template context.
 *#
#macro( springCloseTag )#if($springXhtmlCompliant)/>#else>#end #end





