为图像添加对齐选项


11

一个罕见的事件-我想在WordPress中做某事,但不知道如何去做,搜索实际上没有任何结果。

将图像插入帖子时,将获得对齐选项:“无”,“左”,“右”,“中心”。这些会导致图像插入与对齐有关的CSS类,例如“ alignleft”,“ alignright”或“ aligncenter”。

大。

如果我的主题稍微复杂些,并且我想在此处添加几个选项,就像核心选项一样,该选项将为插入的图像添加一个新的CSS类怎么办?例如-我可以使用一些精美的CSS设置样式以获取一些更复杂的布局的“右边距”选项吗?

关于我可能从哪里开始的任何指示?


您如何定义/选择自定义/复杂的布局?
Chip Bennett

我已经更新了代码到WordPress 4.1.0 wordpress.stackexchange.com/questions/172849/...
杰克Ottermans

Answers:


2

我同意大卫·宾达 -很好的问题!我已经多次遇到此问题,并提出了一个效果很好的解决方案。尽管我确实喜欢添加简短代码按照pavlos-bizimis的建议将图像插入带有类的图像的想法,我认为它不能像在图像编辑弹出窗口中添加选项一样真正解决问题(例如,您可能必须除非您希望手动输入图像ID,否则将图像包装在您的短代码中。另外,对于我的一些客户来说,甚至简码也太复杂了(在这种情况下,您可以将其绑定到TinyMCE按钮上)。

无论如何,没有与再费周折-这是我五毛钱。我在幻灯片插件中使用了该解决方案,该插件为我提供了从幻灯片中包含/排除图像的选项,并为覆盖层显示某些图像元字段的内容设置了背景色。基本上,它挂接到attachment_fields_to_editattachment_fields_to_save以分别添加输入字段和保存表单数据。此数据将作为附件帖子(即您正在编辑的图像)的标准帖子元提供。这非常好,因为可以get_post_meta()像往常一样轻松检索。并且,您还应该向wp_get_attachment_image_attributes或添加过滤器,image_send_to_editor以便每次输出图像时自动添加适当的类。

为了便于阅读,我对代码做了一些修改,因此某些部分可能不完整/错误。

/**
 * Adds a form field for excluding images from slideshow
 *
 * @param array $form_fields Array of form fields
 * @param object $post The post to show
 * @return array Array of form fields
 * @author Simon Fransson
 **/
function hs_attachment_fields_to_edit($form_fields, $post = null)
{

    $val = (boolean)get_post_meta($post->ID, SLIDESHOW_EXCLUDE_IMAGE_KEY, true);
    $id = SLIDESHOW_EXCLUDE_IMAGE_KEY . "-" . $post->ID;
    $markup = sprintf('<label for="%s"><input type="checkbox" class="checkbox" id="%s" name="attachments[%s][%s]" value="true" %s /> %s</label>', $id, $id, $post->ID, SLIDESHOW_EXCLUDE_IMAGE_KEY, checked($val, true, false), __('Exclude from slideshow', 'slideshow'));

    $form_field = array(
        'label' => __('Slideshow', 'slideshow'),
        'input' => 'html',
        'html' => $markup,
        'value' => $val,
        'helps' => __('Excludes the image from slideshows.', 'slideshow'),
    );

    $form_fields[SLIDESHOW_EXCLUDE_IMAGE_KEY] = $form_field; // See update notice below code block!

    return $form_fields;
}
add_filter('attachment_fields_to_edit', 'hs_attachment_fields_to_edit', 10, 2);



/**
 * Save the images exclude status meta value when saving attachment data
 *
 * @param object $post Post object
 * @param  array $attachment Field values
 * @return object Post object
 * @author Simon Fransson
 **/
function hs_attachment_fields_to_save($post, $attachment = null)
{
    update_post_meta($post['ID'], SLIDESHOW_EXCLUDE_IMAGE_KEY, intval(isset($attachment[SLIDESHOW_EXCLUDE_IMAGE_KEY])));

    return $post;
}
add_filter('attachment_fields_to_save', 'hs_attachment_fields_to_save', 10, 2);


/**
 * Generate metadata for newly uploaded attachment.
 * This is here simply because we are dealing with a boolean,
 * which means that for SQL related reasons a value NEEDS to
 * exist even when noting has been specified in the options 
 *
 * @param  array $metadata Array of meta data
 * @param int $attachment_id ID of attachment post
 * @return array Array of meta data
 * @author Simon Fransson
 **/
function hs_generate_attachment_metadata($metadata, $attachment_id = null)
{
    $exclude = intval(get_post_meta($attachment_id, SLIDESHOW_EXCLUDE_IMAGE_KEY, true));
    update_post_meta($attachment_id, SLIDESHOW_EXCLUDE_IMAGE_KEY, $exclude);

    return $metadata;
}
add_filter('wp_generate_attachment_metadata', 'hs_generate_attachment_metadata', 10, 2);

更新:我只是复制此代码以将其用作我正在处理的项目中的样板。从查看代码可以看出,我喜欢将发布元密钥存储在已定义的常量中。执行此操作时,我总是将其值_放在前面,以防止其在meta字段编辑器中显示,但是这种做法可能会导致出现一些问题attachment_fields_to_save$form_fields数组中的键不能以开头_,因此在处理附件字段时,请注意对数组和元值使用不同的键,或修剪所有下划线。由于SLIDESHOW_EXCLUDE_IMAGE_KEY在我的示例中甚至没有定义,因此在复制代码时这可能没什么大不了的,但是我还是想提到它。我花了一些时间才弄清楚(第二次)。


这似乎是建议的最佳解决方案。我将尝试一下,让您知道如何进行。非常感谢您与我分享您的代码。
NatalieMac

1

好问题。这个问题已经解决了。也许下面的代码太长,但不能再短一些。关键是,您可以删除wp_print_media_templates函数的wp_footer和wp_admin_footer挂钩,并用带有自定义选项的您自己的wp_print_media_templates函数替换它。只需将下面的代码放入您的functions.php文件中,即可覆盖原始函数,并允许您在带有HTML注释的行之后修改类<!-在此处设置您的->通过这种方式将类插入到图库的短代码中:

设置为MyClass1的值将生成alignMyClass1。

remove_action( 'wp_footer', 'wp_print_media_templates' );
remove_action( 'admin_footer', 'wp_print_media_templates' );
add_action( 'admin_footer', 'my_wp_print_media_templates' );
add_action( 'wp_footer', 'my_wp_print_media_templates' );

function my_wp_print_media_templates() {
global $is_IE;
$class = 'media-modal wp-core-ui';
if ( $is_IE && strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE 7') !== false )
    $class .= ' ie7';
?>
<script type="text/html" id="tmpl-media-frame">
    <div class="media-frame-menu"></div>
    <div class="media-frame-title"></div>
    <div class="media-frame-router"></div>
    <div class="media-frame-content"></div>
    <div class="media-frame-toolbar"></div>
    <div class="media-frame-uploader"></div>
</script>

<script type="text/html" id="tmpl-media-modal">
    <div class="<?php echo $class; ?>">
        <a class="media-modal-close" href="#" title="<?php esc_attr_e('Close'); ?>"><span class="media-modal-icon"></span></a>
        <div class="media-modal-content"></div>
    </div>
    <div class="media-modal-backdrop"></div>
</script>

<script type="text/html" id="tmpl-uploader-window">
    <div class="uploader-window-content">
        <h3><?php _e( 'Drop files to upload' ); ?></h3>
    </div>
</script>

<script type="text/html" id="tmpl-uploader-inline">
    <# var messageClass = data.message ? 'has-upload-message' : 'no-upload-message'; #>
    <div class="uploader-inline-content {{ messageClass }}">
    <# if ( data.message ) { #>
        <h3 class="upload-message">{{ data.message }}</h3>
    <# } #>
    <?php if ( ! _device_can_upload() ) : ?>
        <h3 class="upload-instructions"><?php _e('The web browser on your device cannot be used to upload files. You may be able to use the <a href="http://wordpress.org/extend/mobile/">native app for your device</a> instead.'); ?></h3>
    <?php elseif ( is_multisite() && ! is_upload_space_available() ) : ?>
        <h3 class="upload-instructions"><?php _e( 'Upload Limit Exceeded' ); ?></h3>
        <?php do_action( 'upload_ui_over_quota' ); ?>

    <?php else : ?>
        <div class="upload-ui">
            <h3 class="upload-instructions drop-instructions"><?php _e( 'Drop files anywhere to upload' ); ?></h3>
            <a href="#" class="browser button button-hero"><?php _e( 'Select Files' ); ?></a>
        </div>

        <div class="upload-inline-status"></div>

        <div class="post-upload-ui">
            <?php
            do_action( 'pre-upload-ui' );
            do_action( 'pre-plupload-upload-ui' );

            if ( 10 === remove_action( 'post-plupload-upload-ui', 'media_upload_flash_bypass' ) ) {
                do_action( 'post-plupload-upload-ui' );
                add_action( 'post-plupload-upload-ui', 'media_upload_flash_bypass' );
            } else {
                do_action( 'post-plupload-upload-ui' );
            }

            $upload_size_unit = $max_upload_size = wp_max_upload_size();
            $byte_sizes = array( 'KB', 'MB', 'GB' );

            for ( $u = -1; $upload_size_unit > 1024 && $u < count( $byte_sizes ) - 1; $u++ ) {
                $upload_size_unit /= 1024;
            }

            if ( $u < 0 ) {
                $upload_size_unit = 0;
                $u = 0;
            } else {
                $upload_size_unit = (int) $upload_size_unit;
            }

            ?>

            <p class="max-upload-size"><?php
                printf( __( 'Maximum upload file size: %d%s.' ), esc_html($upload_size_unit), esc_html($byte_sizes[$u]) );
            ?></p>

            <?php if ( ( $GLOBALS['is_IE'] || $GLOBALS['is_opera']) && $max_upload_size > 100 * 1024 * 1024 ) :
                $browser_uploader = admin_url( 'media-new.php?browser-uploader&post_id=' ) . '{{ data.postId }}';
                ?>
                <p class="big-file-warning"><?php printf( __( 'Your browser has some limitations uploading large files with the multi-file uploader. Please use the <a href="%1$s" target="%2$s">browser uploader</a> for files over 100MB.' ),
                    $browser_uploader, '_blank' ); ?></p>
            <?php endif; ?>

            <?php do_action( 'post-upload-ui' ); ?>
        </div>
    <?php endif; ?>
    </div>
</script>

<script type="text/html" id="tmpl-uploader-status">
    <h3><?php _e( 'Uploading' ); ?></h3>
    <a class="upload-dismiss-errors" href="#"><?php _e('Dismiss Errors'); ?></a>

    <div class="media-progress-bar"><div></div></div>
    <div class="upload-details">
        <span class="upload-count">
            <span class="upload-index"></span> / <span class="upload-total"></span>
        </span>
        <span class="upload-detail-separator">&ndash;</span>
        <span class="upload-filename"></span>
    </div>
    <div class="upload-errors"></div>
</script>

<script type="text/html" id="tmpl-uploader-status-error">
    <span class="upload-error-label"><?php _e('Error'); ?></span>
    <span class="upload-error-filename">{{{ data.filename }}}</span>
    <span class="upload-error-message">{{ data.message }}</span>
</script>

<script type="text/html" id="tmpl-attachment">
    <div class="attachment-preview type-{{ data.type }} subtype-{{ data.subtype }} {{ data.orientation }}">
        <# if ( data.uploading ) { #>
            <div class="media-progress-bar"><div></div></div>
        <# } else if ( 'image' === data.type ) { #>
            <div class="thumbnail">
                <div class="centered">
                    <img src="{{ data.size.url }}" draggable="false" />
                </div>
            </div>
        <# } else { #>
            <img src="{{ data.icon }}" class="icon" draggable="false" />
            <div class="filename">
                <div>{{ data.filename }}</div>
            </div>
        <# } #>

        <# if ( data.buttons.close ) { #>
            <a class="close media-modal-icon" href="#" title="<?php _e('Remove'); ?>"></a>
        <# } #>

        <# if ( data.buttons.check ) { #>
            <a class="check" href="#" title="<?php _e('Deselect'); ?>"><div class="media-modal-icon"></div></a>
        <# } #>
    </div>
    <#
    var maybeReadOnly = data.can.save || data.allowLocalEdits ? '' : 'readonly';
    if ( data.describe ) { #>
        <# if ( 'image' === data.type ) { #>
            <input type="text" value="{{ data.caption }}" class="describe" data-setting="caption"
                placeholder="<?php esc_attr_e('Caption this image&hellip;'); ?>" {{ maybeReadOnly }} />
        <# } else { #>
            <input type="text" value="{{ data.title }}" class="describe" data-setting="title"
                <# if ( 'video' === data.type ) { #>
                    placeholder="<?php esc_attr_e('Describe this video&hellip;'); ?>"
                <# } else if ( 'audio' === data.type ) { #>
                    placeholder="<?php esc_attr_e('Describe this audio file&hellip;'); ?>"
                <# } else { #>
                    placeholder="<?php esc_attr_e('Describe this media file&hellip;'); ?>"
                <# } #> {{ maybeReadOnly }} />
        <# } #>
    <# } #>
</script>

<script type="text/html" id="tmpl-attachment-details">
    <h3>
        <?php _e('Attachment Details'); ?>

        <span class="settings-save-status">
            <span class="spinner"></span>
            <span class="saved"><?php esc_html_e('Saved.'); ?></span>
        </span>
    </h3>
    <div class="attachment-info">
        <div class="thumbnail">
            <# if ( data.uploading ) { #>
                <div class="media-progress-bar"><div></div></div>
            <# } else if ( 'image' === data.type ) { #>
                <img src="{{ data.size.url }}" draggable="false" />
            <# } else { #>
                <img src="{{ data.icon }}" class="icon" draggable="false" />
            <# } #>
        </div>
        <div class="details">
            <div class="filename">{{ data.filename }}</div>
            <div class="uploaded">{{ data.dateFormatted }}</div>

            <# if ( 'image' === data.type && ! data.uploading ) { #>
                <# if ( data.width && data.height ) { #>
                    <div class="dimensions">{{ data.width }} &times; {{ data.height }}</div>
                <# } #>

                <# if ( data.can.save ) { #>
                    <a class="edit-attachment" href="{{ data.editLink }}&amp;image-editor" target="_blank"><?php _e( 'Edit Image' ); ?></a>
                    <a class="refresh-attachment" href="#"><?php _e( 'Refresh' ); ?></a>
                <# } #>
            <# } #>

            <# if ( ! data.uploading && data.can.remove ) { #>
                <a class="delete-attachment" href="#"><?php _e( 'Delete Permanently' ); ?></a>
            <# } #>

            <div class="compat-meta">
                <# if ( data.compat && data.compat.meta ) { #>
                    {{{ data.compat.meta }}}
                <# } #>
            </div>
        </div>
    </div>

    <# var maybeReadOnly = data.can.save || data.allowLocalEdits ? '' : 'readonly'; #>
        <label class="setting" data-setting="title">
            <span><?php _e('Title'); ?></span>
            <input type="text" value="{{ data.title }}" {{ maybeReadOnly }} />
        </label>
        <label class="setting" data-setting="caption">
            <span><?php _e('Caption'); ?></span>
            <textarea {{ maybeReadOnly }}>{{ data.caption }}</textarea>
        </label>
    <# if ( 'image' === data.type ) { #>
        <label class="setting" data-setting="alt">
            <span><?php _e('Alt Text'); ?></span>
            <input type="text" value="{{ data.alt }}" {{ maybeReadOnly }} />
        </label>
    <# } #>
        <label class="setting" data-setting="description">
            <span><?php _e('Description'); ?></span>
            <textarea {{ maybeReadOnly }}>{{ data.description }}</textarea>
        </label>
</script>

<script type="text/html" id="tmpl-media-selection">
    <div class="selection-info">
        <span class="count"></span>
        <# if ( data.editable ) { #>
            <a class="edit-selection" href="#"><?php _e('Edit'); ?></a>
        <# } #>
        <# if ( data.clearable ) { #>
            <a class="clear-selection" href="#"><?php _e('Clear'); ?></a>
        <# } #>
    </div>
    <div class="selection-view"></div>
</script>

<script type="text/html" id="tmpl-attachment-display-settings">
    <h3><?php _e('Attachment Display Settings'); ?></h3>

    <# if ( 'image' === data.type ) { #>
        <label class="setting">
            <span><?php _e('Alignment'); ?></span>
            <select class="alignment"
                data-setting="align"
                <# if ( data.userSettings ) { #>
                    data-user-setting="align"
                <# } #>>

                <option value="left">
                    <?php esc_attr_e('Left'); ?>
                </option>
                <option value="center">
                    <?php esc_attr_e('Center'); ?>
                </option>
                <option value="right">
                    <?php esc_attr_e('Right'); ?>
                </option>
                <option value="none" selected>
                    <?php esc_attr_e('None'); ?>
                </option>
                <!-- SETUP YOUR CLASSES HERE -->
                <option value="MyClass1"> <!-- set value produces class alignMyClass1 -->
                    <?php esc_attr_e('My class 1'); ?> <!-- label for your Class -->
                </option>
            </select>
        </label>
    <# } #>

    <div class="setting">
        <label>
            <span><?php _e('Link To'); ?></span>
            <select class="link-to"
                data-setting="link"
                <# if ( data.userSettings ) { #>
                    data-user-setting="urlbutton"
                <# } #>>

                <option value="custom">
                    <?php esc_attr_e('Custom URL'); ?>
                </option>
                <option value="file" selected>
                    <?php esc_attr_e('Media File'); ?>
                </option>
                <option value="post">
                    <?php esc_attr_e('Attachment Page'); ?>
                </option>
                <option value="none">
                    <?php esc_attr_e('None'); ?>
                </option>                   
            </select>
        </label>
        <input type="text" class="link-to-custom" data-setting="linkUrl" />
    </div>

    <# if ( 'undefined' !== typeof data.sizes ) { #>
        <label class="setting">
            <span><?php _e('Size'); ?></span>
            <select class="size" name="size"
                data-setting="size"
                <# if ( data.userSettings ) { #>
                    data-user-setting="imgsize"
                <# } #>>
                <?php

                $sizes = apply_filters( 'image_size_names_choose', array(
                    'thumbnail' => __('Thumbnail'),
                    'medium'    => __('Medium'),
                    'large'     => __('Large'),
                    'full'      => __('Full Size'),
                ) );

                foreach ( $sizes as $value => $name ) : ?>
                    <#
                    var size = data.sizes['<?php echo esc_js( $value ); ?>'];
                    if ( size ) { #>
                        <option value="<?php echo esc_attr( $value ); ?>" <?php selected( $value, 'full' ); ?>>
                            <?php echo esc_html( $name ); ?> &ndash; {{ size.width }} &times; {{ size.height }}
                        </option>
                    <# } #>
                <?php endforeach; ?>
            </select>
        </label>
    <# } #>
</script>

<script type="text/html" id="tmpl-gallery-settings">
    <h3><?php _e('Gallery Settings'); ?></h3>

    <label class="setting">
        <span><?php _e('Link To'); ?></span>
        <select class="link-to"
            data-setting="link"
            <# if ( data.userSettings ) { #>
                data-user-setting="urlbutton"
            <# } #>>

            <option value="file" selected>
                <?php esc_attr_e('Media File'); ?>
            </option>
            <option value="post">
                <?php esc_attr_e('Attachment Page'); ?>
            </option>
        </select>
    </label>

    <label class="setting">
        <span><?php _e('Columns'); ?></span>
        <select class="columns" name="columns"
            data-setting="columns">
            <?php for ( $i = 1; $i <= 9; $i++ ) : ?>
                <option value="<?php echo esc_attr( $i ); ?>" <?php selected( $i, 3 ); ?>>
                    <?php echo esc_html( $i ); ?>
                </option>
            <?php endfor; ?>
        </select>
    </label>

    <label class="setting">
        <span><?php _e( 'Random Order' ); ?></span>
        <input type="checkbox" data-setting="_orderbyRandom" />
    </label>
</script>

<script type="text/html" id="tmpl-embed-link-settings">
    <label class="setting">
        <span><?php _e('Title'); ?></span>
        <input type="text" class="alignment" data-setting="title" />
    </label>
</script>

<script type="text/html" id="tmpl-embed-image-settings">
    <div class="thumbnail">
        <img src="{{ data.model.url }}" draggable="false" />
    </div>

    <?php if ( ! apply_filters( 'disable_captions', '' ) ) : ?>
        <label class="setting caption">
            <span><?php _e('Caption'); ?></span>
            <textarea data-setting="caption" />
        </label>
    <?php endif; ?>

    <label class="setting alt-text">
        <span><?php _e('Alt Text'); ?></span>
        <input type="text" data-setting="alt" />
    </label>

    <div class="setting align">
        <span><?php _e('Align'); ?></span>
        <div class="button-group button-large" data-setting="align">
            <button class="button" value="left">
                <?php esc_attr_e('Left'); ?>
            </button>
            <button class="button" value="center">
                <?php esc_attr_e('Center'); ?>
            </button>
            <button class="button" value="right">
                <?php esc_attr_e('Right'); ?>
            </button>
            <button class="button active" value="none">
                <?php esc_attr_e('None'); ?>
            </button>
        </div>
    </div>

    <div class="setting link-to">
        <span><?php _e('Link To'); ?></span>
        <div class="button-group button-large" data-setting="link">
            <button class="button" value="file">
                <?php esc_attr_e('Image URL'); ?>
            </button>
            <button class="button" value="custom">
                <?php esc_attr_e('Custom URL'); ?>
            </button>
            <button class="button active" value="none">
                <?php esc_attr_e('None'); ?>
            </button>
        </div>
        <input type="text" class="link-to-custom" data-setting="linkUrl" />
    </div>
</script>

<script type="text/html" id="tmpl-attachments-css">
    <style type="text/css" id="{{ data.id }}-css">
        #{{ data.id }} {
            padding: 0 {{ data.gutter }}px;
        }

        #{{ data.id }} .attachment {
            margin: {{ data.gutter }}px;
            width: {{ data.edge }}px;
        }

        #{{ data.id }} .attachment-preview,
        #{{ data.id }} .attachment-preview .thumbnail {
            width: {{ data.edge }}px;
            height: {{ data.edge }}px;
        }

        #{{ data.id }} .portrait .thumbnail img {
            max-width: {{ data.edge }}px;
            height: auto;
        }

        #{{ data.id }} .landscape .thumbnail img {
            width: auto;
            max-height: {{ data.edge }}px;
        }
    </style>
</script>
<?php

do_action( 'print_media_templates' );
}

如果您想设置没有“ align”前缀的类,则必须修改将简码插入帖子内容textarea的javascript,与在CSS中重命名类相比,它可能太复杂了。恩约


3
我担心用我自己的版本完全替换核心功能将很难维持。如果需要对核心功能进行某种大修或改写怎么办?
NatalieMac

您说得对,我希望会有-带有过滤器和动作挂钩。但是直到那时,我都不会害怕,因为我的客户可以一直与我联系,我将提供快速修复。
david.binda

是的,但是如果另一个插件以相同的方式自定义此代码怎么办?您所描述的方式只能由一个插件完成,而不会发生冲突。
NoBugs

知道在现代版本的WordPress中现在是否可行吗?一直试图弄清楚如何添加“全角”对齐选项,正如@NatalieMac所说,我宁愿不要覆盖整个函数。
JacobTheDev '16

0

也许您应该创建一个用于插入具有类属性的图像的简码。我已经在许多商业主题中看到了这一点。


2
更多详细信息将使它成为一个更好的答案。
s_ha_dum 2013年

主题不应添加post_content短代码。当用户切换主题时,这些简码将不再被解析,并且将导致文章内容输出损坏/意外。
Chip Bennett

同意Chip-我不想走短代码路线,因为如果他更改主题,它们都会被破坏。至少如果我仅将CSS类添加到图像中,可能发生的最糟糕的情况是,如果他更改主题,它将被忽略。
NatalieMac

-3

您可以使用唯一的图像ID分别为特定图像设置样式。


1
我不确定这是否能回答问题。@NatalieMac似乎并没有在寻找一种单独设置图像样式的方法,这非常费力,但是要为标记添加更多类。
s_ha_dum

是的,我可以,但这不是很灵活。我需要客户可以轻松自行更新的内容。
NatalieMac
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