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- Patch #162708 by Eaton and Earl: add support for image buttons to FAPI3. 

This is a small form API extension (doesn't break existing code) that
  facilitates the Drupal 6 upgrade of the Views module.  A good example
  of why it can be beneficial to start upgrading your modules early on in
  the code freeze. ;)
6.x
Dries Buytaert 2007-07-29 17:28:23 +00:00
parent a78ac96295
commit 80ff5109a7
7 changed files with 121 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
includes/common.inc
View File

@ -2774,6 +2774,9 @@ function drupal_common_themes() {
'button' => array(
'arguments' => array('element' => NULL),
),
'image_button' => array(
'arguments' => array('element' => NULL),
),
'hidden' => array(
'arguments' => array('element' => NULL),
),

147
includes/form.inc
View File

@ -44,7 +44,6 @@
*/
function drupal_get_form($form_id) {
$form_state = array('storage' => NULL, 'submitted' => FALSE);
$expire = max(ini_get('session.cookie_lifetime'), 86400);
$args = func_get_args();
@ -62,12 +61,7 @@ function drupal_get_form($form_id) {
// form_state data from a previous step, we'll retrieve it so it can
// be passed on to the form processing code.
if (isset($_POST['form_id']) && $_POST['form_id'] == $form_id && !empty($_POST['form_build_id'])) {
if ($cached = cache_get('form_'. $_POST['form_build_id'], 'cache_form')) {
$form = $cached->data;
if ($cached = cache_get('storage_'. $_POST['form_build_id'], 'cache_form')) {
$form_state['storage'] = $cached->data;
}
}
$form = form_get_cache($_POST['form_build_id'], $form_state);
}
// If the previous bit of code didn't result in a populated $form
@ -84,7 +78,9 @@ function drupal_get_form($form_id) {
$form['#build_id'] = $form_build_id;
drupal_prepare_form($form_id, $form, $form_state);
if (!empty($form['#cache'])) {
cache_set('form_'. $form_build_id, $form, 'cache_form', $expire);
// By not sending the form state, we avoid storing the storage which
// won't have been touched yet.
form_set_cache($form_build_id, $form, NULL);
}
unset($form_state['post']);
}
@ -126,10 +122,7 @@ function drupal_get_form($form_id) {
// Now, we cache the form structure so it can be retrieved later for
// validation. If $form_state['storage'] is populated, we'll also cache
// it so that it can be used to resume complex multi-step processes.
cache_set('form_'. $form_build_id, $form, 'cache_form', $expire);
if (!empty($form_state['storage'])) {
cache_set('storage_'. $form_build_id, $form_state['storage'], 'cache_form', $expire);
}
form_set_cache($form_build_id, $form, $form_state);
// Clear out all post data, as we don't want the previous step's
// data to pollute this one and trigger validate/submit handling,
@ -144,6 +137,31 @@ function drupal_get_form($form_id) {
return drupal_render_form($form_id, $form);
}
/**
* Fetch a form from cache.
*/
function form_get_cache($form_build_id, &$form_state) {
if ($cached = cache_get('form_'. $form_build_id, 'cache_form')) {
$form = $cached->data;
if ($cached = cache_get('storage_'. $form_build_id, 'cache_form')) {
$form_state['storage'] = $cached->data;
}
return $form;
}
}
/**
* Store a form in the cache
*/
function form_set_cache($form_build_id, $form, $form_state) {
$expire = max(ini_get('session.cookie_lifetime'), 86400);
cache_set('form_'. $form_build_id, $form, 'cache_form', $expire);
if (!empty($form_state['storage'])) {
cache_set('storage_'. $form_build_id, $form_state['storage'], 'cache_form', $expire);
}
}
/**
* Retrieves a form using a form_id, populates it with $form_state['values'],
* processes it, and returns any validation errors encountered. This
@ -840,13 +858,7 @@ function _form_builder_handle_input_element($form_id, &$form, &$form_state) {
$button_type = $form['#executes_submit_callback'] ? 'submit' : 'button';
$form_state['buttons'][$button_type][] = $form;
// See if a submit button was clicked. In Internet Explorer, if ONLY
// one submit button is present, AND the enter key is used to submit
// the form, no form value is sent for it and we'll never detect a
// match. In most cases, though, the following code will properly handle
// finding the clicked button and storing any custom validate and
// submit handlers it has defined.
if (isset($form['#post'][$form['#name']]) && $form['#post'][$form['#name']] == $form['#value']) {
if (_form_button_was_clicked($form)) {
$form_state['submitted'] = $form_state['submitted'] || $form['#executes_submit_callback'];
// In most cases, we want to use form_set_value() to manipulate
@ -877,6 +889,64 @@ function _form_builder_handle_input_element($form_id, &$form, &$form_state) {
form_set_value($form, $form['#value'], $form_state);
}
/**
* Helper function to handle the sometimes-convoluted logic of button
* click detection.
*
* In Internet Explorer, if ONLY one submit button is present, AND the
* enter key is used to submit the form, no form value is sent for it
* and we'll never detect a match. That special case is handled by
* _form_builder_ie_cleanup().
*/
function _form_button_was_clicked($form) {
// First detect normal 'vanilla' button clicks. Traditionally, all
// standard buttons on a form share the same name (usually 'op'),
// and the specific return value is used to determine which was
// clicked. This ONLY works as long as $form['#name'] puts the
// value at the top level of the tree of $_POST data.
if (isset($form['#post'][$form['#name']]) && $form['#post'][$form['#name']] == $form['#value']) {
return TRUE;
}
// When image buttons are clicked, browsers do NOT pass the form element
// value in $_POST. Instead they pass an integer representing the
// coordinates of the click on the button image. This means that image
// buttons MUST have unique $form['#name'] values, but the details of
// their $_POST data should be ignored.
elseif (!empty($form['#has_garbage_value']) && isset($form['#value']) && $form['#value'] !== '') {
return TRUE;
}
return FALSE;
}
/**
* In IE, if only one submit button is present, AND the enter key is
* used to submit the form, no form value is sent for it and our normal
* button detection code will never detect a match. We call this
* function after all other button-detection is complete to check
* for the proper conditions, and treat the single button on the form
* as 'clicked' if they are met.
*/
function _form_builder_ie_cleanup($form, &$form_state) {
// Quick check to make sure we're always looking at the full form
// and not a sub-element.
if (!empty($form['#type']) && $form['#type'] == 'form') {
// If we haven't recognized a submission yet, and there's a single
// submit button, we know that we've hit the right conditions. Grab
// the first one and treat it as the clicked button.
if (empty($form_state['submitted']) && !empty($form_state['buttons']['submit']) && empty($form_state['buttons']['button'])) {
$button = $form_state['buttons']['submit'][0];
// Set up all the $form_state information that would have been
// populated had the button been recognized earlier.
$form_state['submitted'] = TRUE;
$form_state['submit_handlers'] = empty($button['#submit']) ? NULL : $button['#submit'];
$form_state['validate_handlers'] = empty($button['#validate']) ? NULL : $button['#validate'];
$form_state['values'][$button['#name']] = $button['#value'];
$form_state['clicked_button'] = $button;
}
}
}
/**
* Helper function to determine the value for a checkbox form element.
*
@ -999,24 +1069,6 @@ function form_type_token_value($form, $edit = FALSE) {
}
}
/**
* Handle the special Internet Explorer one-button-form hit-enter-
* instead-of-clicking scenario.
*/
function _form_builder_ie_cleanup($form, &$form_state) {
if (!empty($form['#type']) && $form['#type'] == 'form') {
// If the 'submitted' flag isn't tripped, but there is only one submit button...
if (empty($form_state['submitted']) && !empty($form_state['buttons']['submit']) && empty($form_state['buttons']['button'])) {
$button = $form_state['buttons']['submit'][0];
$form_state['submitted'] = TRUE;
$form_state['submit_handlers'] = empty($button['#submit']) ? NULL : $button['#submit'];
$form_state['validate_handlers'] = empty($button['#validate']) ? NULL : $button['#validate'];
$form_state['values'][$button['#name']] = $button['#value'];
$form_state['clicked_button'] = $button;
}
}
}
/**
* Use this function to make changes to form values in the form validate
* phase, so they will be available in the submit phase in $form_state.
@ -1598,6 +1650,27 @@ function theme_button($element) {
return '<input type="submit" '. (empty($element['#name']) ? '' : 'name="'. $element['#name'] .'" ') .'id="'. $element['#id'] .'" value="'. check_plain($element['#value']) .'" '. drupal_attributes($element['#attributes']) ." />\n";
}
/**
* Theme an image button.
*/
function theme_image_button($element) {
// Make sure not to overwrite classes.
if (isset($element['#attributes']['class'])) {
$element['#attributes']['class'] = 'form-'. $element['#button_type'] .' '. $element['#attributes']['class'];
}
else {
$element['#attributes']['class'] = 'form-'. $element['#button_type'];
}
return '<input type="image" name="'. $element['#name'] .'" ' .
(!empty($element['#value']) ? ('value="'. check_plain($element['#value']) .'" ') : '') .
'id="' . $element['#id'] . '" ' .
drupal_attributes($element['#attributes']) .
' src="' . base_path() . $element['#image'] . '" ' .
(!empty($element['#title']) ? 'alt="' . check_plain($element['#title']) . '" title="' . check_plain($element['#title']) . '" ' : '' ).
"/>\n";
}
/**
* Format a hidden form field.
*

1
modules/system/system.module
View File

@ -105,6 +105,7 @@ function system_elements() {
// Inputs
$type['submit'] = array('#input' => TRUE, '#name' => 'op', '#button_type' => 'submit', '#executes_submit_callback' => TRUE, '#ahah_event' => 'submit', '#process' => array('form_expand_ahah'));
$type['button'] = array('#input' => TRUE, '#name' => 'op', '#button_type' => 'submit', '#executes_submit_callback' => FALSE, '#ahah_event' => 'submit', '#process' => array('form_expand_ahah'));
$type['image_button'] = array('#input' => TRUE, '#button_type' => 'submit','#executes_submit_callback' => TRUE, '#ahah_event' => 'submit', '#process' => array('form_expand_ahah'), '#has_garbage_value' => TRUE, '#image' => NULL);
$type['textfield'] = array('#input' => TRUE, '#size' => 60, '#maxlength' => 128, '#autocomplete_path' => FALSE);
$type['password'] = array('#input' => TRUE, '#size' => 60, '#maxlength' => 128);
$type['password_confirm'] = array('#input' => TRUE, '#process' => array('expand_password_confirm'));