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WIP eTemplate 2.0 DTD
This commit is contained in:
parent
4d488ef76c
commit
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238
doc/dist/etemplate2-rng.php
vendored
238
doc/dist/etemplate2-rng.php
vendored
@ -1,238 +0,0 @@
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<?php
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/**
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* eTemplate2 XML schema as Relax NG
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* - we read the legacy etemplate2.dtd converted by PHPStorm to Relax NG with an XML parser
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* - remove the obsolete widgets
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* - add new widgets from custom-elements.json file generated by our documentation build
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* - output it again as new eTemplate2 Relax NG schema for our xet files
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*
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* Open problems:
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* - custom-elements.json has no information about element hierarchy: not all elements are allowed be contained by an arbitrary element
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* - Relax NG can define attribute types, need to check how with match our internal types to the xet attributes
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*
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* @link https://en.wikipedia.org/wiki/RELAX_NG RELAX NG (REgular LAnguage for XML Next Generation)
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* @link https://github.com/EGroupware/etemplate/blob/6767672516524444847207d50b21ba59ff7f1540/js/widget_browser.js old widget-browser dtd generation
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* @link https://www.jetbrains.com/help/phpstorm/validating-web-content-files.html JetBrains DTD, XML-Schema or RelaxNG support
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*/
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if (!file_exists($file=__DIR__."/custom-elements.json"))
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{
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die("Missing '$file file!");
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}
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if (!($data=json_decode(file_get_contents($file), true)))
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{
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die("Could not load '$file'!");
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}
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if (!file_exists(($file = __DIR__."/../etemplate2/etemplate2.rng")))
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{
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die("Missing file '$file', you need to generate it from 'etemplate2.dtd' e.g. with PHPStorm!");
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}
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$grammar = new SimpleXMLElement(file_get_contents($file));
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$widgets = getByName($grammar, 'Widgets');
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// overlay can only container template, not all widgets
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getByName($grammar, 'overlay')->element->zeroOrMore->ref->attributes()['name'] = 'template';
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$classes = [];
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foreach($data['modules'] as $module)
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{
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if (empty($module['exports'])) continue;
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foreach($module['exports'] as $export)
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{
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if ($export['kind'] !== 'custom-element-definition' || preg_match('/_(ro|mobile)$/', $export['name']))
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{
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$last_export = $export['name'];
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continue;
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}
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foreach($module['declarations'] as $declaration)
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{
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if ($declaration['kind'] === 'class')
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{
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foreach(['members', 'attributes'] as $collection)
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{
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foreach($declaration[$collection] ?? [] as $key => $element)
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{
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$declaration[$collection][$element['name']] = $element;
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unset($declaration[$collection][$key]);
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}
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}
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$classes[$declaration['name']] = $declaration;
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}
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}
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// some widgets use: customElements.defines(<tag>, <class> as any, ...)
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if ($export['declaration']['name'] === "anonymous_0")
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{
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$export['declaration']['name'] = $last_export;
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}
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/*echo $export['name'].'('.$export['declaration']['name'].'): '.
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implode(', ', attributes($classes[$export['declaration']['name']]))."\n";*/
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/*
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<define name="countdown">
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<element name="countdown">
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<ref name="attlist.countdown"/>
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<empty/>
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</element>
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</define>
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<define name="attlist.countdown" combine="interleave">
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<optional>
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<attribute name="format" a:defaultValue="s"/>
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</optional>
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<optional>
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<attribute name="onFinish"/>
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</optional>
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*/
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if (in_array($export['name'], ['et2-tab', 'et2-tab-panel']))
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{
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continue; // we use the legacy tabs and tabpanels
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}
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// add the element
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$define = $grammar->addChild('define');
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$define->addAttribute('name', $export['name']);
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$element = $define->addChild('element');
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$element->addAttribute('name', $export['name']);
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$attrs = $element->addChild('ref');
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$attrs->addAttribute('name', 'attlist.'.$export['name']);
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// add to widgets
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$widgets->choice->addChild('ref')->addAttribute('name', $export['name']);
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// add the element-attributes
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$attrs = $grammar->addChild('define');
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$attrs->addAttribute('name', 'attlist.'.$export['name']);
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$attrs->addAttribute('combine', 'interleave');
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attributes($classes[$export['declaration']['name']], $attrs);
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// widget specific fixes
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switch($export['name'])
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{
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case 'et2-tabbox':
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// add legacy children tabs and tabpanels
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$element->addChild('ref')->addAttribute('name', 'tabs');
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$element->addChild('ref')->addAttribute('name', 'tabpanels');
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break;
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default:
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// dont allow children
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$element->addChild('empty');
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break;
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}
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// remove corresponding legacy widget
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removeWidget(str_replace('et2-', '', $export['name']));
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}
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}
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$remove = [];
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foreach($widgets->choice->children() as $widget)
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{
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if (preg_match('/^(button|dropdown_button|int|float|menu|select|taglist|tree|passwd|date|time|ajax_select|vfs-(select|path))/', $name=(string)$widget->attributes()['name']))
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{
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$remove[] = $name; // removing direct disturbs the foreach!
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}
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}
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foreach($remove as $name)
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{
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removeWidget($name);
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}
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$dom = new DOMDocument("1.0");
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$dom->preserveWhiteSpace = false;
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$dom->formatOutput = true;
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$dom->loadXML($grammar->asXML());
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if (php_sapi_name() !== "cli")
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{
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header('Content-Type: application/xml; charset=utf-8');
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}
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echo $dom->saveXML();
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/**
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* Remove (legacy-)widget with given name from schema
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*
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* @param string $name
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* @return void
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*/
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function removeWidget(string $name)
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{
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global $grammar, $widgets;
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if (removeByName($widgets->choice, $name))
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{
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removeByName($grammar, $name);
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removeByName($grammar, 'attlist.'.$name);
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}
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}
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function removeByName(SimpleXMLElement $parent, string $name) : bool
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{
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foreach($parent->children() as $child)
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{
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if ((string)$child->attributes()['name'] === $name)
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{
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$dom=dom_import_simplexml($child);
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$dom->parentNode->removeChild($dom);
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return true;
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}
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}
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return false;
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}
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function getByName(SimpleXMLElement $parent, string $name) : ?SimpleXMLElement
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{
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foreach($parent as $element)
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{
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if ((string)$element->attributes()['name'] === $name)
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{
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return $element;
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}
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}
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return null;
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}
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/**
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* Generate attribute list for an element
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*
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* @param array $class class defining the element
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* @param SimpleXMLElement|null $attrs attribute list element: <define name="attlist.<element>" combine="interleave"/>
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* @return string[]|void
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*/
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function attributes(array $class, ?SimpleXMLElement $attrs=null)
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{
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static $default_attributes = [
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'id' => ['name' => 'id', 'type' => ['text' => 'string']], // commented out with some reasoning in Et2Widget
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];
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$attributes = $default_attributes+array_filter($class['attributes'] ?? [], static function ($attr)
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{
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return ($attr['name'] ?? null) && $attr['name'][0] !== '_'; // ignore attributes with empty name or name starting with understore
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});
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if (!isset($attrs))
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{
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return array_map(static function($attr) use ($class)
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{
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return $attr['name'].'('.($attr['type']['text']??'any').
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(isset($attr['fieldName']) && isset($class['members'][$attr['fieldName']]['default']) ?
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':'.$class['members'][$attr['fieldName']]['default'] : '').')';
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}, $attributes);
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}
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foreach($attributes as $attr)
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{
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// todo: are all attributes optional
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$optional = $attrs->addChild('optional');
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$attribute = $optional->addChild('attribute');
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$attribute->addAttribute('name', $attr['name']);
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if (isset($attr['fieldName']) && isset($class['members'][$attr['fieldName']]['default']))
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{
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$default = $class['members'][$attr['fieldName']]['default'];
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if (in_array($default[0], ['"', "'"]) && $default[0] === substr($default, -1))
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{
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$default = substr($default, 1, -1);
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}
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$attribute->addAttribute('a:defaultValue', $default, 'http://relaxng.org/ns/compatibility/annotations/1.0');
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}
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switch ($attr['type']['text'] ?? 'any')
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{
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case 'boolean':
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$choice = $attribute->addChild('choice');
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$choice->addChild('value', 'false');
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$choice->addChild('value', 'true');
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break;
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}
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}
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}
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419
doc/etemplate2-rng.php
Normal file
419
doc/etemplate2-rng.php
Normal file
@ -0,0 +1,419 @@
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<?php
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/**
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* eTemplate2 XML schema
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* 1. we read the legacy etemplate2.dtd converted by PHPStorm (Tools > XML Actions > Convert Schema) to Relax NG with an XML parser
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* 2. remove the obsolete widgets
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||||
* 3. add new widgets from custom-elements.json file generated by our documentation build
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||||
* 4. apply overwrites below
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* 5. output it again as new eTemplate2 Relax NG schema
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* 6. convert it again via PHPStorm (Tools > XML Actions > Convert Schema) to etemplate2.0.dtd referenced in our xet files
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* (until we figure out how to use RELAX NG direct)
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*
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* Open problems:
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* - custom-elements.json has no information about element hierarchy: not all elements are allowed be contained by an arbitrary element
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* - Relax NG can define attribute types, need to check how with match our internal types to the xet attributes
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*
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* @link https://en.wikipedia.org/wiki/RELAX_NG RELAX NG (REgular LAnguage for XML Next Generation)
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* @link https://relaxng.org/tutorial-20011203.html RELAX NG Tutorial
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* @link https://github.com/EGroupware/etemplate/blob/6767672516524444847207d50b21ba59ff7f1540/js/widget_browser.js old widget-browser dtd generation
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* @link https://www.jetbrains.com/help/phpstorm/validating-web-content-files.html JetBrains DTD, XML-Schema or RelaxNG support
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*/
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if (!file_exists($file=__DIR__."/dist/custom-elements.json"))
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{
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die("Missing '$file file!");
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}
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if (!($data=json_decode(file_get_contents($file), true)))
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{
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die("Could not load '$file'!");
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}
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if (!file_exists(($file = __DIR__."/etemplate2/etemplate2.rng")))
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{
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die("Missing file '$file', you need to generate it from 'etemplate2.dtd' e.g. with PHPStorm!");
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}
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$grammar = new SimpleXMLElement(file_get_contents($file));
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$widgets = getByName($grammar, 'Widgets');
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/**
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* Manually overwriting problems / errors in what we automatically generate
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* @todo fix in TS sources
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*/
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$overwrites = [
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// RE to remove no longer used legacy widgets not matching "et2-<legacy-name>"
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'.remove' => '/^(button|dropdown_button|int|float|menu|select|taglist|tree|passwd|date|time|ajax_select|vfs-(select|path))/',
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'*' => [ // all widgets
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'.attrs' => [
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'id' => 'string', // commented out with some reasoning in Et2Widget
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//'data' => null, // ToDo: not sure, but AFAIK this is no attribute, but somehow listed in each widget
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'width' => 'string',
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'span' => 'string', // actually int|"all"
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],
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],
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'Et2InputWidget' => [
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'.attrs' => [
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'tabindex' => 'int',
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],
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],
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'Et2Textbox' => [
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'.attrs' => [
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'placeholder' => 'string',
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'maxlength' => 'int',
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],
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],
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'Et2InvokerMixin' => 'Et2TextBox',
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'et2-description' => [
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'.attrs' => [
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'for' => 'string',
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],
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],
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'et2-textarea' => [
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'.attrs' => [
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'maxlength' => 'int',
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'rows' => 'int',
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'resizeRatio' => 'number', // is this correct
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],
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],
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'et2-date' => [
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'.attrs' => [
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'yearRange' => 'string',
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'dataFormat' => 'string',
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],
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],
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'et2-hbox' => [
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'.children' => 'Widgets',
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],
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'et2-vbox' => [
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'.children' => 'Widgets',
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],
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'et2-box' => [
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'.children' => 'Widgets',
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],
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'Et2Box' => [ // inherited by et2-(v|h)box too
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'.attrs' => [
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'overflow' => 'string',
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],
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],
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'et2-tabbox' => [
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'.children' => ['tabs','tabpanels'], // add legacy children tabs and tabpanels
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'.attrs' => [
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'cfDisabled' => 'boolean', // implemented on server-side
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'cfTypeFilter' => 'string',
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'cfPrivateTab' => 'boolean',
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'cfPrepend' => 'string',
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'cfExclude' => 'string',
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],
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],
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'et2-tab' => null, // remove/skip, as we currently use legacy tabs and tabpanels
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'et2-tab-panel' => null,
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'et2-details' => [
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'.children' => 'Widgets',
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],
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'et2-split' => [
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'.children' => 'Widgets',
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],
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'et2-select-*' => 'et2-select', // seems like et2-select-* widgets are NOT parsed
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];
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/**
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* Fixes on the existing legacy DTD
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*/
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// make overlay the only allowed start element
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removeNode($grammar->start->choice);
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$grammar->start->addChild('ref')->addAttribute('name', 'overlay');
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// overlay can only container template, not all widgets
|
||||
getByName($grammar, 'overlay')->element->zeroOrMore->ref->attributes()['name'] = 'template';
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getByName($grammar, 'attlist.vfs-upload')->addChild('optional')
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->addChild('attribute')->addAttribute('name', 'callback');
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// add statustext to tab
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getByName($grammar, 'attlist.tab')->addChild('optional')
|
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->addChild('attribute')->addAttribute('name', 'statustext');
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||||
// build a hashed version of all classes, members and attributes to e.g. find ancestors
|
||||
$classes = [];
|
||||
foreach($data['modules'] as $module)
|
||||
{
|
||||
foreach ($module['declarations'] as $declaration)
|
||||
{
|
||||
if ($declaration['kind'] === 'class')
|
||||
{
|
||||
foreach (['members', 'attributes'] as $collection)
|
||||
{
|
||||
foreach ($declaration[$collection] ?? [] as $key => $element)
|
||||
{
|
||||
$declaration[$collection][$element['name']] = $element;
|
||||
unset($declaration[$collection][$key]);
|
||||
}
|
||||
}
|
||||
$classes[$declaration['name']] = $declaration;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// iterate of custom-elements to define in the schema
|
||||
foreach($data['modules'] as $module)
|
||||
{
|
||||
foreach($module['exports'] ?? [] as $export)
|
||||
{
|
||||
// some widgets use: customElements.defines(<tag>, <class> as any, ...) --> use previous export
|
||||
if (!empty($export['declaration']['name']) && $export['declaration']['name'] === "anonymous_0")
|
||||
{
|
||||
$export['declaration']['name'] = $last_export;
|
||||
}
|
||||
$last_export = $export['name'];
|
||||
|
||||
// ignore / skip none-widgets and some of the widgets e.g. r/o versions
|
||||
if ($export['kind'] !== 'custom-element-definition' ||
|
||||
preg_match('/_(ro|mobile)$/', $export['name']) ||
|
||||
array_key_exists($export['name'], $overwrites) && !isset($overwrites[$export['name']]))
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
// add the element
|
||||
$define = $grammar->addChild('define');
|
||||
$define->addAttribute('name', $export['name']);
|
||||
$element = $define->addChild('element');
|
||||
$element->addAttribute('name', $export['name']);
|
||||
$attrs = $element->addChild('ref');
|
||||
$attrs->addAttribute('name', 'attlist.'.$export['name']);
|
||||
// add to widgets
|
||||
$widgets->choice->addChild('ref')->addAttribute('name', $export['name']);
|
||||
|
||||
// add the element-attributes
|
||||
$attrs = $grammar->addChild('define');
|
||||
$attrs->addAttribute('name', 'attlist.'.$export['name']);
|
||||
$attrs->addAttribute('combine', 'interleave');
|
||||
if (empty($classes[$export['declaration']['name']]['tagName'])) $classes[$export['declaration']['name']]['tagName'] = $export['name'];
|
||||
attributes($classes[$export['declaration']['name']], $attrs);
|
||||
|
||||
// add or disallow children depending on overwrites (not available from the TS sources)
|
||||
// ToDo: this ignores the use in slots!
|
||||
if (empty($overwrites[$export['name']]['.children']))
|
||||
{
|
||||
// don't allow children
|
||||
$element->addChild('empty');
|
||||
}
|
||||
else
|
||||
{
|
||||
// add allowed children
|
||||
foreach((array)$overwrites[$export['name']]['.children'] as $child)
|
||||
{
|
||||
$element->addChild('ref')->addAttribute('name', $child);
|
||||
}
|
||||
}
|
||||
|
||||
// remove corresponding legacy widget
|
||||
removeWidget(str_replace('et2-', '', $export['name']));
|
||||
}
|
||||
}
|
||||
|
||||
$remove = [];
|
||||
foreach($widgets->choice->children() as $widget)
|
||||
{
|
||||
if (preg_match($overwrites['.remove'], $name=(string)$widget->attributes()['name']))
|
||||
{
|
||||
$remove[] = $name; // removing direct disturbs the foreach!
|
||||
}
|
||||
}
|
||||
foreach($remove as $name)
|
||||
{
|
||||
removeWidget($name);
|
||||
}
|
||||
|
||||
$dom = new DOMDocument("1.0");
|
||||
$dom->preserveWhiteSpace = false;
|
||||
$dom->formatOutput = true;
|
||||
$dom->loadXML($grammar->asXML());
|
||||
if (php_sapi_name() !== "cli")
|
||||
{
|
||||
header('Content-Type: application/xml; charset=utf-8');
|
||||
}
|
||||
// add <value>1</value> to legacy widget boolean attributes
|
||||
echo preg_replace('#<choice>
|
||||
(\s+)<value>true</value>
|
||||
(\s+)<value>false</value>
|
||||
(\s+)</choice>#', "<choice>\n\$1<value>false</value>\n\$1<value>true</value>\n\$1<value>1</value>\n\$3</choice>",
|
||||
// update the header
|
||||
preg_replace('#<!--.*-->#s', '<!--
|
||||
==========================================================
|
||||
EGroupware: eTemplate 2.0 DTD
|
||||
AUTHOR: Hadi Nategh <hn[AT]egroupware.org>, Ralf Becker <rb[AT]egroupware.org>
|
||||
COPYRIGHT: 2016-2024 by EGroupware GmbH
|
||||
LICENSE: https://opensource.org/licenses/gpl-license.php GPL - GNU General Public License Version 2+
|
||||
PUBLIC ID: "https://www.egroupware.org/etemplate2.0.dtd"
|
||||
Version: 1.2
|
||||
==========================================================
|
||||
|
||||
==========================================================
|
||||
An example how to use this DTD from your XML document:
|
||||
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<!DOCTYPE overlay PUBLIC "-//EGroupware GmbH//eTemplate 2//EN" "https://www.egroupware.org/etemplate2.0.dtd">
|
||||
<overlay>
|
||||
...
|
||||
</overlay>
|
||||
==========================================================
|
||||
-->', $dom->saveXML()));
|
||||
|
||||
/**
|
||||
* Remove (legacy-)widget with given name from schema
|
||||
*
|
||||
* @param string $name
|
||||
* @return void
|
||||
*/
|
||||
function removeWidget(string $name)
|
||||
{
|
||||
global $grammar, $widgets;
|
||||
if (removeByName($widgets->choice, $name))
|
||||
{
|
||||
removeByName($grammar, $name);
|
||||
removeByName($grammar, 'attlist.'.$name);
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
function removeByName(SimpleXMLElement $parent, string $name) : bool
|
||||
{
|
||||
foreach($parent->children() as $child)
|
||||
{
|
||||
if ((string)$child->attributes()['name'] === $name)
|
||||
{
|
||||
removeNode($child);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
function removeNode(SimpleXMLElement $node)
|
||||
{
|
||||
$dom=dom_import_simplexml($node);
|
||||
$dom->parentNode->removeChild($dom);
|
||||
}
|
||||
|
||||
function getByName(SimpleXMLElement $parent, string $name) : ?SimpleXMLElement
|
||||
{
|
||||
foreach($parent as $element)
|
||||
{
|
||||
if ((string)$element->attributes()['name'] === $name)
|
||||
{
|
||||
return $element;
|
||||
}
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Overwrite attributes in given element / class
|
||||
* @param array& $element
|
||||
* @param string|null $name overwrites to use e.g. "*", default use $element['name']
|
||||
* @return void
|
||||
*/
|
||||
function overwriteAttributes(array& $element, string $name=null)
|
||||
{
|
||||
global $overwrites;
|
||||
|
||||
if (!isset($name)) $name = $element['tagName'];
|
||||
|
||||
// forward just to another widget, class or mixin
|
||||
if (isset($overwrites[$name]) && is_string($overwrites[$name]))
|
||||
{
|
||||
$name = $overwrites[$name];
|
||||
}
|
||||
if (empty($overwrites[$name]['.attrs']))
|
||||
{
|
||||
return; // nothing to do
|
||||
}
|
||||
foreach($overwrites[$name]['.attrs'] as $attr => $type)
|
||||
{
|
||||
if (isset($type))
|
||||
{
|
||||
$element['attributes'][$attr] = ['name' => $attr, 'type' => ['text' => $type]];
|
||||
}
|
||||
else
|
||||
{
|
||||
unset($element['attributes'][$attr]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Generate attribute list for an element
|
||||
*
|
||||
* @param array $class class defining the element
|
||||
* @param SimpleXMLElement|null $attrs attribute list element: <define name="attlist.<element>" combine="interleave"/>
|
||||
* @return string[]|void
|
||||
*/
|
||||
function attributes(array $class, ?SimpleXMLElement $attrs=null)
|
||||
{
|
||||
overwriteAttributes($class, '*');
|
||||
overwriteAttributes($class);
|
||||
// also apply overwrites of own class, direct parent and mixins
|
||||
foreach(getAncestors($class) as $parent)
|
||||
{
|
||||
if ($parent && !empty($parent['name']) && preg_match('/^Et2/', $parent['name'])) // can also be Lit or Sl*
|
||||
{
|
||||
overwriteAttributes($class, $parent['name']);
|
||||
}
|
||||
}
|
||||
$attributes = array_filter($class['attributes'] ?? [], static function ($attr)
|
||||
{
|
||||
return ($attr['name'] ?? null) && $attr['name'][0] !== '_'; // ignore attributes with empty name or name starting with underscore
|
||||
});
|
||||
|
||||
if (!isset($attrs))
|
||||
{
|
||||
return array_map(static function($attr) use ($class)
|
||||
{
|
||||
return $attr['name'].'('.($attr['type']['text']??'any').
|
||||
(isset($attr['fieldName']) && isset($class['members'][$attr['fieldName']]['default']) ?
|
||||
':'.$class['members'][$attr['fieldName']]['default'] : '').')';
|
||||
}, $attributes);
|
||||
}
|
||||
foreach($attributes as $attr)
|
||||
{
|
||||
// todo: are all attributes optional, probably
|
||||
$optional = $attrs->addChild('optional');
|
||||
$attribute = $optional->addChild('attribute');
|
||||
$attribute->addAttribute('name', $attr['name']);
|
||||
if (isset($attr['fieldName']) && isset($class['members'][$attr['fieldName']]['default']))
|
||||
{
|
||||
$default = $class['members'][$attr['fieldName']]['default'];
|
||||
if (in_array($default[0], ['"', "'"]) && $default[0] === substr($default, -1))
|
||||
{
|
||||
$default = substr($default, 1, -1);
|
||||
}
|
||||
$attribute->addAttribute('a:defaultValue', $default, 'http://relaxng.org/ns/compatibility/annotations/1.0');
|
||||
}
|
||||
switch ($attr['type']['text'] ?? 'any')
|
||||
{
|
||||
case 'boolean':
|
||||
$choice = $attribute->addChild('choice');
|
||||
$choice->addChild('value', 'false');
|
||||
$choice->addChild('value', 'true');
|
||||
$choice->addChild('value', '1'); // often used in our templates
|
||||
// not understood by DTD :(
|
||||
//$choice->addChild('text'); // as we allow "@<attr>" or "$cont[name]"
|
||||
break;
|
||||
// todo: other types are understood by RELAX NG, but not by DTD
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Get ancestors: superclass(es) and mixins of the current class/element
|
||||
*
|
||||
* @param array|null $class
|
||||
* @return array[] of array with name attribute
|
||||
*/
|
||||
function getAncestors(?array $class=null)
|
||||
{
|
||||
if (!isset($class) || empty($class['name']) || !preg_match('/^Et2/', $class['name']))
|
||||
{
|
||||
return [];
|
||||
}
|
||||
if (!isset($class['kind']))
|
||||
{
|
||||
global $classes;
|
||||
$class = $classes[$class['name']] ?? null;
|
||||
}
|
||||
return $class ? array_filter([$class, ...getAncestors($class['superclass']??null), ...$class['mixins']??[]]) : [];
|
||||
}
|
2954
doc/etemplate2/etemplate2.0.dtd
Normal file
2954
doc/etemplate2/etemplate2.0.dtd
Normal file
File diff suppressed because it is too large
Load Diff
11625
doc/etemplate2/etemplate2.0.rng
Normal file
11625
doc/etemplate2/etemplate2.0.rng
Normal file
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue
Block a user