first import

sites/all/modules/insert/includes/file.inc

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+<?php
+
+/**
+ * @file
+ * Insert support for File module.
+ */
+
+/**
+ * Implementation of hook_insert_widgets().
+ */
+function file_insert_widgets() {
+  return array(
+    'file_generic' => array(
+      'element_type' => 'managed_file',
+      'wrapper' => '.file-widget',
+      'fields' => array(
+        'description' => 'input[name$="[description]"]',
+      ),
+    ),
+  );
+}

sites/all/modules/insert/includes/image.inc

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+<?php
+
+/**
+ * @file
+ * Insert support for ImageField module.
+ */
+
+/**
+ * Implementation of hook_insert_widgets().
+ */
+function image_insert_widgets() {
+  return array(
+    'image_image' => array(
+      'element_type' => 'managed_file',
+      'wrapper' => '.image-widget',
+      'fields' => array(
+        'alt' => 'input[name$="[alt]"], textarea[name$="[alt]"]',
+        'title' => 'input[name$="[title]"], textarea[name$="[title]"]',
+        'description' => 'input[name$="[description]"], textarea[name$="[description]"]',
+      ),
+    ),
+  );
+}
+
+/**
+ * Implementation of hook_insert_styles().
+ */
+function image_insert_styles() {
+  $image_styles = image_styles();
+  $insert_styles = array();
+  foreach ($image_styles as $style) {
+    $insert_styles['image_' . $style['name']] = array(
+      'label' => t($style['name']),
+    );
+  }
+  return $insert_styles;
+}
+
+/**
+ * Implementation of hook_insert_content().
+ */
+function image_insert_content($item, $style, $widget) {
+  $style_name = preg_replace('/^image_/', '', $style['name']);
+  return theme(array('image_insert_image__' . str_replace('-', '_', $style_name), 'image_insert_image'), array('item' => $item, 'widget' => $widget, 'style_name' => $style_name));
+}
+
+/**
+ * Theme the content that will be inserted for Image styles.
+ */
+function template_preprocess_image_insert_image(&$vars) {
+  $vars['file'] = file_load($vars['item']['fid']);
+
+  // Determine dimensions of the image after the image style transformations.
+  $image_info = @image_get_info($vars['file']->uri);
+  $vars['width'] = isset($image_info['width']) ? $image_info['width'] : NULL;
+  $vars['height'] = isset($image_info['height']) ? $image_info['height'] : NULL;
+  image_style_transform_dimensions($vars['style_name'], $vars);
+
+  $vars['uri'] = image_style_path($vars['style_name'], $vars['file']->uri);
+  $absolute = isset($vars['widget']['settings']['insert_absolute']) ? $vars['widget']['settings']['insert_absolute'] : NULL;
+  $vars['url'] = insert_create_url($vars['uri'], $absolute, variable_get('clean_url'));
+
+  // http://drupal.org/node/1923336
+  if (function_exists('image_style_path_token')) {
+    $token_query = array(IMAGE_DERIVATIVE_TOKEN => image_style_path_token($vars['style_name'], $vars['file']->uri));
+    $vars['url'] .= (strpos($vars['url'], '?') !== FALSE ? '&' : '?') . drupal_http_build_query($token_query);
+  }
+
+  $vars['class'] = !empty($vars['widget']['settings']['insert_class']) ? $vars['widget']['settings']['insert_class'] : '';
+}

sites/all/modules/insert/includes/insert.inc

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+<?php
+
+/**
+ * @file
+ * Insert support for generic files.
+ */
+
+/**
+ * Implementation of hook_insert_styles().
+ */
+function insert_insert_styles() {
+  $insert_styles = array();
+  $insert_styles['auto'] = array('label' => t('Automatic'), 'weight' => -20);
+  $insert_styles['link'] = array('label' => t('Link to file'), 'weight' => -12);
+  $insert_styles['icon_link'] = array('label' => t('Link to file (with icon)'), 'weight' => -11);
+  $insert_styles['image'] = array('label' => t('Original image'), 'weight' => -10);
+  return $insert_styles;
+}
+
+/**
+ * Implementation of hook_insert_content().
+ */
+function insert_insert_content($item, $style, $widget) {
+  $style_name = $style['name'];
+
+  if (empty($item['fid'])) {
+    return '';
+  }
+
+  if ($style_name == 'auto') {
+    $file = file_load($item['fid']);
+    $info = @pathinfo($file->uri);
+    if (in_array(strtolower($info['extension']), array('png', 'jpg', 'jpeg', 'gif'))) {
+      $style_name = 'image';
+    }
+  }
+
+  if ($style_name == 'image') {
+    return theme('insert_image', array('item' => $item, 'widget' => $widget));
+  }
+  if ($style_name == 'icon_link') {
+    return theme('insert_icon_link', array('item' => $item, 'widget' => $widget));
+  }
+  else {
+    return theme('insert_link', array('item' => $item, 'widget' => $widget));
+  }
+}
+
+/**
+ * Preprocess variables for the insert-image.tpl.php file.
+ */
+function template_preprocess_insert_image(&$vars) {
+  $vars['file'] = file_load($vars['item']['fid']);
+  $absolute = isset($vars['widget']['settings']['insert_absolute']) ? $vars['widget']['settings']['insert_absolute'] : NULL;
+  $vars['url'] = insert_create_url($vars['file']->uri, $absolute);
+  $vars['class'] = !empty($vars['widget']['settings']['insert_class']) ? $vars['widget']['settings']['insert_class'] : '';
+  $image_info = @image_get_info($vars['file']->uri);
+  $vars['width'] = isset($image_info['width']) ? $image_info['width'] : '';
+  $vars['height'] = isset($image_info['height']) ? $image_info['height'] : '';
+}
+
+/**
+ * Preprocess variables for the insert-link.tpl.php file.
+ */
+function template_preprocess_insert_link(&$vars) {
+  $vars['file'] = file_load($vars['item']['fid']);
+  $absolute = isset($vars['widget']['settings']['insert_absolute']) ? $vars['widget']['settings']['insert_absolute'] : NULL;
+  $vars['url'] = insert_create_url($vars['file']->uri, $absolute);
+  $vars['class'] = !empty($vars['widget']['settings']['insert_class']) ? $vars['widget']['settings']['insert_class'] : '';
+  $vars['name'] = $vars['file']->filename;
+}
+
+/**
+ * Preprocess variables for the insert-icon-link.tpl.php file.
+ */
+function template_preprocess_insert_icon_link(&$vars) {
+  $vars['file'] = file_load($vars['item']['fid']);
+  $absolute = isset($vars['widget']['settings']['insert_absolute']) ? $vars['widget']['settings']['insert_absolute'] : NULL;
+  $vars['url'] = insert_create_url($vars['file']->uri, $absolute);
+  $vars['class'] = !empty($vars['widget']['settings']['insert_class']) ? $vars['widget']['settings']['insert_class'] : '';
+  $vars['name'] = $vars['file']->filename;
+  $vars['type'] = $vars['file']->filemime .'; length='. $vars['file']->filesize;
+  $vars['icon'] = theme('file_icon', array('file' => $vars['file']));
+}