643 lines
21 KiB
PHP
643 lines
21 KiB
PHP
<?php
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/**
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* @file
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* Implement an image field, based on the file module's file field.
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*/
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/**
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* Implements hook_field_info().
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*/
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function image_field_info() {
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return array(
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'image' => array(
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'label' => t('Image'),
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'description' => t('This field stores the ID of an image file as an integer value.'),
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'settings' => array(
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'uri_scheme' => variable_get('file_default_scheme', 'public'),
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'default_image' => 0,
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),
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'instance_settings' => array(
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'file_extensions' => 'png gif jpg jpeg',
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'file_directory' => '',
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'max_filesize' => '',
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'alt_field' => 0,
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'title_field' => 0,
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'max_resolution' => '',
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'min_resolution' => '',
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'default_image' => 0,
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),
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'default_widget' => 'image_image',
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'default_formatter' => 'image',
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),
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);
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}
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/**
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* Implements hook_field_settings_form().
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*/
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function image_field_settings_form($field, $instance) {
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$defaults = field_info_field_settings($field['type']);
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$settings = array_merge($defaults, $field['settings']);
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$scheme_options = array();
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foreach (file_get_stream_wrappers(STREAM_WRAPPERS_WRITE_VISIBLE) as $scheme => $stream_wrapper) {
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$scheme_options[$scheme] = $stream_wrapper['name'];
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}
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$form['uri_scheme'] = array(
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'#type' => 'radios',
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'#title' => t('Upload destination'),
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'#options' => $scheme_options,
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'#default_value' => $settings['uri_scheme'],
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'#description' => t('Select where the final files should be stored. Private file storage has significantly more overhead than public files, but allows restricted access to files within this field.'),
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);
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// When the user sets the scheme on the UI, even for the first time, it's
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// updating a field because fields are created on the "Manage fields"
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// page. So image_field_update_field() can handle this change.
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$form['default_image'] = array(
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'#title' => t('Default image'),
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'#type' => 'managed_file',
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'#description' => t('If no image is uploaded, this image will be shown on display.'),
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'#default_value' => $field['settings']['default_image'],
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'#upload_location' => $settings['uri_scheme'] . '://default_images/',
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);
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return $form;
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}
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/**
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* Implements hook_field_instance_settings_form().
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*/
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function image_field_instance_settings_form($field, $instance) {
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$settings = $instance['settings'];
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// Use the file field instance settings form as a basis.
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$form = file_field_instance_settings_form($field, $instance);
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// Add maximum and minimum resolution settings.
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$max_resolution = explode('x', $settings['max_resolution']) + array('', '');
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$form['max_resolution'] = array(
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'#type' => 'item',
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'#title' => t('Maximum image resolution'),
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'#element_validate' => array('_image_field_resolution_validate'),
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'#weight' => 4.1,
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'#field_prefix' => '<div class="container-inline">',
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'#field_suffix' => '</div>',
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'#description' => t('The maximum allowed image size expressed as WIDTHxHEIGHT (e.g. 640x480). Leave blank for no restriction. If a larger image is uploaded, it will be resized to reflect the given width and height. Resizing images on upload will cause the loss of <a href="http://en.wikipedia.org/wiki/Exchangeable_image_file_format">EXIF data</a> in the image.'),
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);
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$form['max_resolution']['x'] = array(
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'#type' => 'textfield',
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'#title' => t('Maximum width'),
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'#title_display' => 'invisible',
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'#default_value' => $max_resolution[0],
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'#size' => 5,
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'#maxlength' => 5,
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'#field_suffix' => ' x ',
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);
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$form['max_resolution']['y'] = array(
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'#type' => 'textfield',
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'#title' => t('Maximum height'),
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'#title_display' => 'invisible',
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'#default_value' => $max_resolution[1],
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'#size' => 5,
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'#maxlength' => 5,
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'#field_suffix' => ' ' . t('pixels'),
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);
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$min_resolution = explode('x', $settings['min_resolution']) + array('', '');
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$form['min_resolution'] = array(
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'#type' => 'item',
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'#title' => t('Minimum image resolution'),
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'#element_validate' => array('_image_field_resolution_validate'),
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'#weight' => 4.2,
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'#field_prefix' => '<div class="container-inline">',
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'#field_suffix' => '</div>',
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'#description' => t('The minimum allowed image size expressed as WIDTHxHEIGHT (e.g. 640x480). Leave blank for no restriction. If a smaller image is uploaded, it will be rejected.'),
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);
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$form['min_resolution']['x'] = array(
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'#type' => 'textfield',
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'#title' => t('Minimum width'),
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'#title_display' => 'invisible',
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'#default_value' => $min_resolution[0],
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'#size' => 5,
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'#maxlength' => 5,
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'#field_suffix' => ' x ',
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);
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$form['min_resolution']['y'] = array(
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'#type' => 'textfield',
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'#title' => t('Minimum height'),
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'#title_display' => 'invisible',
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'#default_value' => $min_resolution[1],
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'#size' => 5,
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'#maxlength' => 5,
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'#field_suffix' => ' ' . t('pixels'),
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);
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// Remove the description option.
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unset($form['description_field']);
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// Add title and alt configuration options.
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$form['alt_field'] = array(
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'#type' => 'checkbox',
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'#title' => t('Enable <em>Alt</em> field'),
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'#default_value' => $settings['alt_field'],
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'#description' => t('The alt attribute may be used by search engines, screen readers, and when the image cannot be loaded.'),
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'#weight' => 10,
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);
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$form['title_field'] = array(
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'#type' => 'checkbox',
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'#title' => t('Enable <em>Title</em> field'),
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'#default_value' => $settings['title_field'],
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'#description' => t('The title attribute is used as a tooltip when the mouse hovers over the image.'),
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'#weight' => 11,
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);
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// Add the default image to the instance.
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$form['default_image'] = array(
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'#title' => t('Default image'),
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'#type' => 'managed_file',
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'#description' => t("If no image is uploaded, this image will be shown on display and will override the field's default image."),
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'#default_value' => $settings['default_image'],
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'#upload_location' => $field['settings']['uri_scheme'] . '://default_images/',
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);
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return $form;
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}
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/**
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* Element validate function for resolution fields.
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*/
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function _image_field_resolution_validate($element, &$form_state) {
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if (!empty($element['x']['#value']) || !empty($element['y']['#value'])) {
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foreach (array('x', 'y') as $dimension) {
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$value = $element[$dimension]['#value'];
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if (!is_numeric($value)) {
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form_error($element[$dimension], t('Height and width values must be numeric.'));
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return;
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}
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if (intval($value) == 0) {
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form_error($element[$dimension], t('Both a height and width value must be specified in the !name field.', array('!name' => $element['#title'])));
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return;
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}
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}
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form_set_value($element, intval($element['x']['#value']) . 'x' . intval($element['y']['#value']), $form_state);
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}
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else {
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form_set_value($element, '', $form_state);
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}
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}
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/**
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* Implements hook_field_load().
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*/
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function image_field_load($entity_type, $entities, $field, $instances, $langcode, &$items, $age) {
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file_field_load($entity_type, $entities, $field, $instances, $langcode, $items, $age);
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}
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/**
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* Implements hook_field_prepare_view().
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*/
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function image_field_prepare_view($entity_type, $entities, $field, $instances, $langcode, &$items) {
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// If there are no files specified at all, use the default.
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foreach ($entities as $id => $entity) {
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if (empty($items[$id])) {
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$fid = 0;
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// Use the default for the instance if one is available.
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if (!empty($instances[$id]['settings']['default_image'])) {
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$fid = $instances[$id]['settings']['default_image'];
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}
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// Otherwise, use the default for the field.
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elseif (!empty($field['settings']['default_image'])) {
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$fid = $field['settings']['default_image'];
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}
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// Add the default image if one is found.
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if ($fid && ($file = file_load($fid))) {
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$items[$id][0] = (array) $file + array(
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'is_default' => TRUE,
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'alt' => '',
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'title' => '',
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);
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}
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}
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}
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}
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/**
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* Implements hook_field_presave().
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*/
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function image_field_presave($entity_type, $entity, $field, $instance, $langcode, &$items) {
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file_field_presave($entity_type, $entity, $field, $instance, $langcode, $items);
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// Determine the dimensions if necessary.
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foreach ($items as &$item) {
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if (!isset($item['width']) || !isset($item['height'])) {
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$info = image_get_info(file_load($item['fid'])->uri);
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if (is_array($info)) {
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$item['width'] = $info['width'];
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$item['height'] = $info['height'];
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}
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}
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}
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}
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/**
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* Implements hook_field_insert().
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*/
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function image_field_insert($entity_type, $entity, $field, $instance, $langcode, &$items) {
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file_field_insert($entity_type, $entity, $field, $instance, $langcode, $items);
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}
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/**
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* Implements hook_field_update().
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*/
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function image_field_update($entity_type, $entity, $field, $instance, $langcode, &$items) {
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file_field_update($entity_type, $entity, $field, $instance, $langcode, $items);
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}
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/**
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* Implements hook_field_delete().
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*/
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function image_field_delete($entity_type, $entity, $field, $instance, $langcode, &$items) {
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file_field_delete($entity_type, $entity, $field, $instance, $langcode, $items);
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}
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/**
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* Implements hook_field_delete_revision().
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*/
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function image_field_delete_revision($entity_type, $entity, $field, $instance, $langcode, &$items) {
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file_field_delete_revision($entity_type, $entity, $field, $instance, $langcode, $items);
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}
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/**
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* Implements hook_field_is_empty().
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*/
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function image_field_is_empty($item, $field) {
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return file_field_is_empty($item, $field);
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}
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/**
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* Implements hook_field_widget_info().
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*/
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function image_field_widget_info() {
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return array(
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'image_image' => array(
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'label' => t('Image'),
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'field types' => array('image'),
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'settings' => array(
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'progress_indicator' => 'throbber',
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'preview_image_style' => 'thumbnail',
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),
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'behaviors' => array(
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'multiple values' => FIELD_BEHAVIOR_CUSTOM,
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'default value' => FIELD_BEHAVIOR_NONE,
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),
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),
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);
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}
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/**
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* Implements hook_field_widget_settings_form().
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*/
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function image_field_widget_settings_form($field, $instance) {
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$widget = $instance['widget'];
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$settings = $widget['settings'];
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// Use the file widget settings form.
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$form = file_field_widget_settings_form($field, $instance);
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$form['preview_image_style'] = array(
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'#title' => t('Preview image style'),
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'#type' => 'select',
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'#options' => image_style_options(FALSE, PASS_THROUGH),
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'#empty_option' => '<' . t('no preview') . '>',
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'#default_value' => $settings['preview_image_style'],
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'#description' => t('The preview image will be shown while editing the content.'),
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'#weight' => 15,
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);
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return $form;
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}
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/**
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* Implements hook_field_widget_form().
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*/
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function image_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) {
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// Add display_field setting to field because file_field_widget_form() assumes it is set.
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$field['settings']['display_field'] = 0;
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$elements = file_field_widget_form($form, $form_state, $field, $instance, $langcode, $items, $delta, $element);
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$settings = $instance['settings'];
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foreach (element_children($elements) as $delta) {
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// Add upload resolution validation.
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if ($settings['max_resolution'] || $settings['min_resolution']) {
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$elements[$delta]['#upload_validators']['file_validate_image_resolution'] = array($settings['max_resolution'], $settings['min_resolution']);
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}
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// If not using custom extension validation, ensure this is an image.
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$supported_extensions = array('png', 'gif', 'jpg', 'jpeg');
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$extensions = isset($elements[$delta]['#upload_validators']['file_validate_extensions'][0]) ? $elements[$delta]['#upload_validators']['file_validate_extensions'][0] : implode(' ', $supported_extensions);
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$extensions = array_intersect(explode(' ', $extensions), $supported_extensions);
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$elements[$delta]['#upload_validators']['file_validate_extensions'][0] = implode(' ', $extensions);
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// Add all extra functionality provided by the image widget.
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$elements[$delta]['#process'][] = 'image_field_widget_process';
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}
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if ($field['cardinality'] == 1) {
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// If there's only one field, return it as delta 0.
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if (empty($elements[0]['#default_value']['fid'])) {
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$elements[0]['#description'] = theme('file_upload_help', array('description' => field_filter_xss($instance['description']), 'upload_validators' => $elements[0]['#upload_validators']));
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}
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}
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else {
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$elements['#file_upload_description'] = theme('file_upload_help', array('upload_validators' => $elements[0]['#upload_validators']));
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}
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return $elements;
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}
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/**
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* An element #process callback for the image_image field type.
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*
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* Expands the image_image type to include the alt and title fields.
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*/
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function image_field_widget_process($element, &$form_state, $form) {
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$item = $element['#value'];
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$item['fid'] = $element['fid']['#value'];
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$instance = field_widget_instance($element, $form_state);
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$settings = $instance['settings'];
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$widget_settings = $instance['widget']['settings'];
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$element['#theme'] = 'image_widget';
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$element['#attached']['css'][] = drupal_get_path('module', 'image') . '/image.css';
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// Add the image preview.
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if ($element['#file'] && $widget_settings['preview_image_style']) {
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$variables = array(
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'style_name' => $widget_settings['preview_image_style'],
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'path' => $element['#file']->uri,
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);
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// Determine image dimensions.
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if (isset($element['#value']['width']) && isset($element['#value']['height'])) {
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$variables['width'] = $element['#value']['width'];
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$variables['height'] = $element['#value']['height'];
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}
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else {
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$info = image_get_info($element['#file']->uri);
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if (is_array($info)) {
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$variables['width'] = $info['width'];
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$variables['height'] = $info['height'];
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}
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else {
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$variables['width'] = $variables['height'] = NULL;
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}
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}
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$element['preview'] = array(
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'#type' => 'markup',
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'#markup' => theme('image_style', $variables),
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);
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// Store the dimensions in the form so the file doesn't have to be accessed
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// again. This is important for remote files.
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$element['width'] = array(
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'#type' => 'hidden',
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'#value' => $variables['width'],
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);
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$element['height'] = array(
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'#type' => 'hidden',
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'#value' => $variables['height'],
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);
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}
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// Add the additional alt and title fields.
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$element['alt'] = array(
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'#title' => t('Alternate text'),
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'#type' => 'textfield',
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'#default_value' => isset($item['alt']) ? $item['alt'] : '',
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'#description' => t('This text will be used by screen readers, search engines, or when the image cannot be loaded.'),
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// @see http://www.gawds.org/show.php?contentid=28
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'#maxlength' => 512,
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'#weight' => -2,
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'#access' => (bool) $item['fid'] && $settings['alt_field'],
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);
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$element['title'] = array(
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'#type' => 'textfield',
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'#title' => t('Title'),
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'#default_value' => isset($item['title']) ? $item['title'] : '',
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'#description' => t('The title is used as a tool tip when the user hovers the mouse over the image.'),
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'#maxlength' => 1024,
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'#weight' => -1,
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'#access' => (bool) $item['fid'] && $settings['title_field'],
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);
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return $element;
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}
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/**
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* Returns HTML for an image field widget.
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*
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* @param $variables
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* An associative array containing:
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* - element: A render element representing the image field widget.
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*
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* @ingroup themeable
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*/
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function theme_image_widget($variables) {
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$element = $variables['element'];
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$output = '';
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$output .= '<div class="image-widget form-managed-file clearfix">';
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if (isset($element['preview'])) {
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$output .= '<div class="image-preview">';
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$output .= drupal_render($element['preview']);
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$output .= '</div>';
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}
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$output .= '<div class="image-widget-data">';
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if ($element['fid']['#value'] != 0) {
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$element['filename']['#markup'] .= ' <span class="file-size">(' . format_size($element['#file']->filesize) . ')</span> ';
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}
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$output .= drupal_render_children($element);
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$output .= '</div>';
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$output .= '</div>';
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return $output;
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}
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/**
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* Implements hook_field_formatter_info().
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*/
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function image_field_formatter_info() {
|
|
$formatters = array(
|
|
'image' => array(
|
|
'label' => t('Image'),
|
|
'field types' => array('image'),
|
|
'settings' => array('image_style' => '', 'image_link' => ''),
|
|
),
|
|
);
|
|
|
|
return $formatters;
|
|
}
|
|
|
|
/**
|
|
* Implements hook_field_formatter_settings_form().
|
|
*/
|
|
function image_field_formatter_settings_form($field, $instance, $view_mode, $form, &$form_state) {
|
|
$display = $instance['display'][$view_mode];
|
|
$settings = $display['settings'];
|
|
|
|
$image_styles = image_style_options(FALSE, PASS_THROUGH);
|
|
$element['image_style'] = array(
|
|
'#title' => t('Image style'),
|
|
'#type' => 'select',
|
|
'#default_value' => $settings['image_style'],
|
|
'#empty_option' => t('None (original image)'),
|
|
'#options' => $image_styles,
|
|
);
|
|
|
|
$link_types = array(
|
|
'content' => t('Content'),
|
|
'file' => t('File'),
|
|
);
|
|
$element['image_link'] = array(
|
|
'#title' => t('Link image to'),
|
|
'#type' => 'select',
|
|
'#default_value' => $settings['image_link'],
|
|
'#empty_option' => t('Nothing'),
|
|
'#options' => $link_types,
|
|
);
|
|
|
|
return $element;
|
|
}
|
|
|
|
/**
|
|
* Implements hook_field_formatter_settings_summary().
|
|
*/
|
|
function image_field_formatter_settings_summary($field, $instance, $view_mode) {
|
|
$display = $instance['display'][$view_mode];
|
|
$settings = $display['settings'];
|
|
|
|
$summary = array();
|
|
|
|
$image_styles = image_style_options(FALSE, PASS_THROUGH);
|
|
// Unset possible 'No defined styles' option.
|
|
unset($image_styles['']);
|
|
// Styles could be lost because of enabled/disabled modules that defines
|
|
// their styles in code.
|
|
if (isset($image_styles[$settings['image_style']])) {
|
|
$summary[] = t('Image style: @style', array('@style' => $image_styles[$settings['image_style']]));
|
|
}
|
|
else {
|
|
$summary[] = t('Original image');
|
|
}
|
|
|
|
$link_types = array(
|
|
'content' => t('Linked to content'),
|
|
'file' => t('Linked to file'),
|
|
);
|
|
// Display this setting only if image is linked.
|
|
if (isset($link_types[$settings['image_link']])) {
|
|
$summary[] = $link_types[$settings['image_link']];
|
|
}
|
|
|
|
return implode('<br />', $summary);
|
|
}
|
|
|
|
/**
|
|
* Implements hook_field_formatter_view().
|
|
*/
|
|
function image_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
|
|
$element = array();
|
|
|
|
// Check if the formatter involves a link.
|
|
if ($display['settings']['image_link'] == 'content') {
|
|
$uri = entity_uri($entity_type, $entity);
|
|
}
|
|
elseif ($display['settings']['image_link'] == 'file') {
|
|
$link_file = TRUE;
|
|
}
|
|
|
|
foreach ($items as $delta => $item) {
|
|
if (isset($link_file)) {
|
|
$uri = array(
|
|
'path' => file_create_url($item['uri']),
|
|
'options' => array(),
|
|
);
|
|
}
|
|
$element[$delta] = array(
|
|
'#theme' => 'image_formatter',
|
|
'#item' => $item,
|
|
'#image_style' => $display['settings']['image_style'],
|
|
'#path' => isset($uri) ? $uri : '',
|
|
);
|
|
}
|
|
|
|
return $element;
|
|
}
|
|
|
|
/**
|
|
* Returns HTML for an image field formatter.
|
|
*
|
|
* @param $variables
|
|
* An associative array containing:
|
|
* - item: Associative array of image data, which may include "uri", "alt",
|
|
* "width", "height", "title" and "attributes".
|
|
* - image_style: An optional image style.
|
|
* - path: An array containing the link 'path' and link 'options'.
|
|
*
|
|
* @ingroup themeable
|
|
*/
|
|
function theme_image_formatter($variables) {
|
|
$item = $variables['item'];
|
|
$image = array(
|
|
'path' => $item['uri'],
|
|
);
|
|
|
|
if (array_key_exists('alt', $item)) {
|
|
$image['alt'] = $item['alt'];
|
|
}
|
|
|
|
if (isset($item['attributes'])) {
|
|
$image['attributes'] = $item['attributes'];
|
|
}
|
|
|
|
if (isset($item['width']) && isset($item['height'])) {
|
|
$image['width'] = $item['width'];
|
|
$image['height'] = $item['height'];
|
|
}
|
|
|
|
// Do not output an empty 'title' attribute.
|
|
if (isset($item['title']) && drupal_strlen($item['title']) > 0) {
|
|
$image['title'] = $item['title'];
|
|
}
|
|
|
|
if ($variables['image_style']) {
|
|
$image['style_name'] = $variables['image_style'];
|
|
$output = theme('image_style', $image);
|
|
}
|
|
else {
|
|
$output = theme('image', $image);
|
|
}
|
|
|
|
// The link path and link options are both optional, but for the options to be
|
|
// processed, the link path must at least be an empty string.
|
|
if (isset($variables['path']['path'])) {
|
|
$path = $variables['path']['path'];
|
|
$options = isset($variables['path']['options']) ? $variables['path']['options'] : array();
|
|
// When displaying an image inside a link, the html option must be TRUE.
|
|
$options['html'] = TRUE;
|
|
$output = l($output, $path, $options);
|
|
}
|
|
|
|
return $output;
|
|
}
|