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XFA - Add support for prototypes (#12979)

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- specifications: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.364.2157&rep=rep1&type=pdf#page=225&zoom=auto,-207,784
 - add a clone method on nodes in order to be able to clone a proto;
 - support ids in template namespace;
 - prevent from cycle when applying protos.
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calixteman 2021-02-18 01:32:25 -08:00 • committed by GitHub
parent 4619b1b568
commit 0fa9976268
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5 changed files with 413 additions and 18 deletions
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15
src/core/xfa/parser.js
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@ -13,7 +13,7 @@
* limitations under the License.
*/
import { $clean, $finalize, $onChild, $onText } from "./xfa_object.js";
import { $clean, $finalize, $onChild, $onText, $setId } from "./xfa_object.js";
import { XMLParserBase, XMLParserErrorCode } from "../xml_parser.js";
import { Builder } from "./builder.js";
import { warn } from "../../shared/util.js";
@ -23,7 +23,8 @@ class XFAParser extends XMLParserBase {
super();
this._builder = new Builder();
this._stack = [];
this._current = this._builder.buildRoot();
this._ids = new Map();
this._current = this._builder.buildRoot(this._ids);
this._errorCode = XMLParserErrorCode.NoError;
this._whiteRegex = /^\s+$/;
}
@ -35,6 +36,8 @@ class XFAParser extends XMLParserBase {
return undefined;
}
this._current[$finalize]();
return this._current.element;
}
@ -101,7 +104,9 @@ class XFAParser extends XMLParserBase {
if (isEmpty) {
// No children: just push the node into its parent.
node[$finalize]();
this._current[$onChild](node);
if (this._current[$onChild](node)) {
node[$setId](this._ids);
}
node[$clean](this._builder);
return;
}
@ -114,7 +119,9 @@ class XFAParser extends XMLParserBase {
const node = this._current;
node[$finalize]();
this._current = this._stack.pop();
this._current[$onChild](node);
if (this._current[$onChild](node)) {
node[$setId](this._ids);
}
node[$clean](this._builder);
}