Add initial paged edits

Early feature.
Off by default. Set `gravityview/features/paged-edit` filter to true.

Basics on #718

includes/extensions/edit-entry/class-edit-entry-render.php

@@ -116,6 +116,17 @@ class GravityView_Edit_Entry_Render {
 	 */
 	public $is_valid = NULL;
 
+	/**
+	 * Internal page button states.
+	 *
+	 * @var bool
+	 *
+	 * @since develop
+	 */
+	public $show_previous_button;
+	public $show_next_button;
+	public $show_update_button;
+
 	function __construct( GravityView_Edit_Entry $loader ) {
 		$this->loader = $loader;
 	}
@@ -1109,6 +1120,8 @@ private function render_edit_form() {
 
 		add_filter( 'gform_pre_render', array( $this, 'filter_modify_form_fields'), 5000, 3 );
 		add_filter( 'gform_submit_button', array( $this, 'render_form_buttons') );
+		add_filter( 'gform_next_button', array( $this, 'render_form_buttons' ) );
+		add_filter( 'gform_previous_button', array( $this, 'render_form_buttons' ) );
 		add_filter( 'gform_disable_view_counter', '__return_true' );
 
 		add_filter( 'gform_field_input', array( $this, 'verify_user_can_edit_post' ), 5, 5 );
@@ -1117,7 +1130,37 @@ private function render_edit_form() {
 		// We need to remove the fake $_GET['page'] arg to avoid rendering form as if in admin.
 		unset( $_GET['page'] );
 
+		$this->show_next_button = false;
+		$this->show_previous_button = false;
+
 		// TODO: Verify multiple-page forms
+		if ( GFCommon::has_pages( $this->form ) && apply_filters( 'gravityview/features/paged-edit', false ) ) {
+			if ( intval( $page_number = \GV\Utils::_POST( 'gform_target_page_number_' . $this->form['id'], 1 ) ) > 1 ) {
+				GFFormDisplay::$submission[ $this->form['id'] ][ 'form' ] = $this->form;
+				GFFormDisplay::$submission[ $this->form['id'] ][ 'is_valid' ] = true;
+				GFFormDisplay::$submission[ $this->form['id'] ][ 'page_number' ] = $page_number;
+			}
+
+			if ( ( $page_number = intval( $page_number ) ) < 2 ) {
+				$this->show_next_button = true; // First page
+			}
+
+			$last_page = \GFFormDisplay::get_max_page_number( $this->form );
+
+			$has_more_pages = $page_number < $last_page;
+
+			if ( $has_more_pages ) {
+				$this->show_next_button = true; // Not the last page
+			} else {
+				$this->show_update_button = true; // The last page
+			}
+
+			if ( $page_number > 1 ) {
+				$this->show_previous_button = true; // Not the first page
+			}
+		} else {
+			$this->show_update_button = true;
+		}
 
 		ob_start(); // Prevent PHP warnings possibly caused by prefilling list fields for conditional logic
 
@@ -1127,6 +1170,8 @@ private function render_edit_form() {
 
 	    remove_filter( 'gform_pre_render', array( $this, 'filter_modify_form_fields' ), 5000 );
 		remove_filter( 'gform_submit_button', array( $this, 'render_form_buttons' ) );
+		remove_filter( 'gform_next_button', array( $this, 'render_form_buttons' ) );
+		remove_filter( 'gform_previous_button', array( $this, 'render_form_buttons' ) );
 		remove_filter( 'gform_disable_view_counter', '__return_true' );
 		remove_filter( 'gform_field_input', array( $this, 'verify_user_can_edit_post' ), 5 );
 		remove_filter( 'gform_field_input', array( $this, 'modify_edit_field_input' ), 10 );
@@ -1740,6 +1785,10 @@ private function filter_fields( $fields, $configured_fields ) {
 
 		$field_type_blacklist = $this->loader->get_field_blacklist( $this->entry );
 
+		if ( empty( $configured_fields ) && apply_filters( 'gravityview/features/paged-edit', false ) ) {
+			$field_type_blacklist = array_diff( $field_type_blacklist, array( 'page' ) );
+		}
+
 		// First, remove blacklist or calculation fields
 		foreach ( $fields as $key => $field ) {
 

includes/extensions/edit-entry/partials/form-buttons.php

@@ -3,6 +3,19 @@
  * @file form-buttons.php
  * @global GravityView_Edit_Entry_Render $object
  */
+
+if ( current_filter() === 'gform_previous_button' ) {
+	if ( $object->show_previous_button || $object->show_update_button ) {
+		return; // Will be called later once more
+	}
+}
+
+if ( current_filter() === 'gform_next_button' ) {
+	if ( $object->show_update_button ) {
+		return; // Will be called later once more
+	}
+}
+
 ?>
 <div id="publishing-action">
 	<?php
@@ -29,7 +42,9 @@
 
 	$labels = array(
 		'cancel' => __( 'Cancel', 'gravityview' ),
-		'submit' => __( 'Update', 'gravityview')
+		'submit' => __( 'Update', 'gravityview '),
+		'next'   => __( 'Next', 'gravityview' ),
+		'previous' => __( 'Previous', 'gravityview' ),
 	);
 
 	/**
@@ -42,11 +57,30 @@
 	 */
 	$labels = apply_filters( 'gravityview/edit_entry/button_labels', $labels, $object->form, $object->entry, $object->view_id );
 
-	$update_tabindex  = GFCommon::get_tabindex();
-	$cancel_tabindex  = GFCommon::get_tabindex();
-	?>
-	<input id="gform_submit_button_<?php echo esc_attr( $object->form['id'] ); ?>" class="btn btn-lg button button-large gform_button button-primary gv-button-update" type="submit" <?php echo $update_tabindex; ?> value="<?php echo esc_attr( $labels['submit'] ); ?>" name="save" />
+	if ( $object->show_previous_button ) {
+		$previous_tabindex = GFCommon::get_tabindex();
+		?>
+		<input id="gform_previous_button_<?php echo esc_attr( $object->form['id'] ); ?>" class="btn btn-lg button button-large gform_button button-primary gv-button-previous" type="submit" <?php echo $previous_tabindex; ?> value="<?php echo esc_attr( $labels['previous'] ); ?>" name="save" />
+		<?php
+	}
 
+	if ( $object->show_next_button ) {
+		$next_tabindex    = GFCommon::get_tabindex();
+		?>
+		<input id="gform_next_button_<?php echo esc_attr( $object->form['id'] ); ?>" class="btn btn-lg button button-large gform_button button-primary gv-button-next" type="submit" <?php echo $next_tabindex; ?> value="<?php echo esc_attr( $labels['next'] ); ?>" name="save" />
+		<?php
+	}
+
+	if ( $object->show_update_button ) {
+		$update_tabindex  = GFCommon::get_tabindex();
+		?>
+		<input id="gform_submit_button_<?php echo esc_attr( $object->form['id'] ); ?>" class="btn btn-lg button button-large gform_button button-primary gv-button-update" type="submit" <?php echo $update_tabindex; ?> value="<?php echo esc_attr( $labels['submit'] ); ?>" name="save" />
+		<?php
+	}
+
+	$cancel_tabindex   = GFCommon::get_tabindex();
+
+	?>
 	<a class="btn btn-sm button button-small gv-button-cancel" <?php echo $cancel_tabindex; ?> href="<?php echo esc_url( $back_link ); ?>"><?php echo esc_attr( $labels['cancel'] ); ?></a>
 	<?php
 

readme.txt

@@ -48,6 +48,7 @@ Beautifully display your Gravity Forms entries. Learn more on [gravityview.co](h
 * Added: `gravityview/search/sieve_choices` filter that sieves Search Widget field filter choices to only ones that have been used in entries
 * Added: `gravityview/search/filter_details` filter for developers to modify search filter configurations
 * Added: `gravityview/admin/available_fields` filter for developers to add their own assignable fields to View configurations
+* Added: `gravityview/features/paged-edit` secret filter to enable early-bird paged form edit entries
 
 = 2.4.1.1 on August 27, 2019 =