mirror of
https://github.com/rkd77/elinks.git
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[js] document.attributes
This commit is contained in:
Witold Filipczyk
parent
c71b0f2ee1
commit
5c5621aadd
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@ -47,11 +47,13 @@
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#include "viewer/text/vs.h"
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#include <libxml++/libxml++.h>
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#include <libxml++/attributenode.h>
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#include <iostream>
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#include <algorithm>
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#include <string>
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static bool element_get_property_attributes(JSContext *ctx, unsigned int argc, JS::Value *vp);
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static bool element_get_property_childElementCount(JSContext *ctx, unsigned int argc, JS::Value *vp);
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static bool element_get_property_className(JSContext *ctx, unsigned int argc, JS::Value *vp);
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static bool element_set_property_className(JSContext *ctx, unsigned int argc, JS::Value *vp);
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@ -88,6 +90,7 @@ JSClass element_class = {
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};
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JSPropertySpec element_props[] = {
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JS_PSG("attributes", element_get_property_attributes, JSPROP_ENUMERATE),
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JS_PSG("childElementCount", element_get_property_childElementCount, JSPROP_ENUMERATE),
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JS_PSGS("className", element_get_property_className, element_set_property_className, JSPROP_ENUMERATE),
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JS_PSGS("dir", element_get_property_dir, element_set_property_dir, JSPROP_ENUMERATE),
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@ -105,6 +108,53 @@ JSPropertySpec element_props[] = {
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JS_PS_END
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};
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static bool
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element_get_property_attributes(JSContext *ctx, unsigned int argc, JS::Value *vp)
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{
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JS::CallArgs args = CallArgsFromVp(argc, vp);
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JS::RootedObject hobj(ctx, &args.thisv().toObject());
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struct view_state *vs;
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JSCompartment *comp = js::GetContextCompartment(ctx);
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if (!comp) {
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return false;
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}
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struct ecmascript_interpreter *interpreter = JS_GetCompartmentPrivate(comp);
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/* This can be called if @obj if not itself an instance of the
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* appropriate class but has one in its prototype chain. Fail
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* such calls. */
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if (!JS_InstanceOf(ctx, hobj, &element_class, NULL))
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return false;
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vs = interpreter->vs;
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if (!vs) {
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return false;
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}
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xmlpp::Element *el = JS_GetPrivate(hobj);
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if (!el) {
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args.rval().setNull();
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return true;
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}
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xmlpp::Element::AttributeList *attrs = new xmlpp::Element::AttributeList;
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*attrs = el->get_attributes();
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if (attrs->size() == 0) {
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args.rval().setNull();
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return true;
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}
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JSObject *obj = getAttributes(ctx, attrs);
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args.rval().setObject(*obj);
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return true;
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}
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static bool
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element_get_property_childElementCount(JSContext *ctx, unsigned int argc, JS::Value *vp)
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{
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@ -1343,3 +1393,363 @@ getCollection(JSContext *ctx, void *node)
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return el;
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}
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static bool attributes_item(JSContext *ctx, unsigned int argc, JS::Value *rval);
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static bool attributes_getNamedItem(JSContext *ctx, unsigned int argc, JS::Value *rval);
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static bool attributes_get_property(JSContext *ctx, JS::HandleObject hobj, JS::HandleId hid, JS::MutableHandleValue hvp);
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static bool attributes_item2(JSContext *ctx, JS::HandleObject hobj, int index, JS::MutableHandleValue hvp);
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static bool attributes_namedItem2(JSContext *ctx, JS::HandleObject hobj, char *str, JS::MutableHandleValue hvp);
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JSClassOps attributes_ops = {
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JS_PropertyStub, nullptr,
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attributes_get_property, JS_StrictPropertyStub,
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nullptr, nullptr, nullptr, nullptr
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};
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JSClass attributes_class = {
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"attributes",
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JSCLASS_HAS_PRIVATE,
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&attributes_ops
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};
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static const spidermonkeyFunctionSpec attributes_funcs[] = {
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{ "item", attributes_item, 1 },
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{ "getNamedItem", attributes_getNamedItem, 1 },
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{ NULL }
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};
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static bool attributes_get_property_length(JSContext *ctx, unsigned int argc, JS::Value *vp);
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static JSPropertySpec attributes_props[] = {
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JS_PSG("length", attributes_get_property_length, JSPROP_ENUMERATE),
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JS_PS_END
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};
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static bool
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attributes_get_property_length(JSContext *ctx, unsigned int argc, JS::Value *vp)
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{
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JS::CallArgs args = CallArgsFromVp(argc, vp);
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JS::RootedObject hobj(ctx, &args.thisv().toObject());
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struct view_state *vs;
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JSCompartment *comp = js::GetContextCompartment(ctx);
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if (!comp) {
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return false;
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}
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struct ecmascript_interpreter *interpreter = JS_GetCompartmentPrivate(comp);
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/* This can be called if @obj if not itself an instance of the
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* appropriate class but has one in its prototype chain. Fail
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* such calls. */
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if (!JS_InstanceOf(ctx, hobj, &attributes_class, NULL))
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return false;
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vs = interpreter->vs;
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if (!vs) {
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return false;
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}
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xmlpp::Element::AttributeList *al = JS_GetPrivate(hobj);
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if (!al) {
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args.rval().setInt32(0);
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return true;
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}
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args.rval().setInt32(al->size());
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return true;
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}
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static bool
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attributes_item(JSContext *ctx, unsigned int argc, JS::Value *vp)
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{
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JS::Value val;
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
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JS::RootedObject hobj(ctx, &args.thisv().toObject());
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JS::RootedValue rval(ctx, val);
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int index = args[0].toInt32();
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bool ret = attributes_item2(ctx, hobj, index, &rval);
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args.rval().set(rval);
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return ret;
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}
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static bool
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attributes_getNamedItem(JSContext *ctx, unsigned int argc, JS::Value *vp)
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{
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JS::Value val;
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
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JS::RootedObject hobj(ctx, &args.thisv().toObject());
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JS::RootedValue rval(ctx, val);
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char *str = JS_EncodeString(ctx, args[0].toString());
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bool ret = attributes_namedItem2(ctx, hobj, str, &rval);
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args.rval().set(rval);
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return ret;
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}
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static bool
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attributes_item2(JSContext *ctx, JS::HandleObject hobj, int index, JS::MutableHandleValue hvp)
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{
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JSCompartment *comp = js::GetContextCompartment(ctx);
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if (!comp) {
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return false;
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}
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struct ecmascript_interpreter *interpreter = JS_GetCompartmentPrivate(comp);
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if (!JS_InstanceOf(ctx, hobj, &attributes_class, NULL)) return false;
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hvp.setUndefined();
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xmlpp::Element::AttributeList *al = JS_GetPrivate(hobj);
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if (!al) {
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return true;
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}
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auto it = al->begin();
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auto end = al->end();
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int i = 0;
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for (;it != end; ++it, ++i) {
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if (i != index) {
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continue;
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}
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xmlpp::Attribute *attr = *it;
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JSObject *obj = getAttr(ctx, attr);
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hvp.setObject(*obj);
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break;
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}
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return true;
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}
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static bool
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attributes_namedItem2(JSContext *ctx, JS::HandleObject hobj, char *str, JS::MutableHandleValue hvp)
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{
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JSCompartment *comp = js::GetContextCompartment(ctx);
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if (!comp) {
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return false;
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}
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struct ecmascript_interpreter *interpreter = JS_GetCompartmentPrivate(comp);
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if (!JS_InstanceOf(ctx, hobj, &attributes_class, NULL))
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return false;
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xmlpp::Element::AttributeList *al = JS_GetPrivate(hobj);
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hvp.setUndefined();
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if (!al) {
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return true;
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}
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std::string name = str;
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auto it = al->begin();
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auto end = al->end();
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for (; it != end; ++it) {
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const auto attr = dynamic_cast<const xmlpp::AttributeNode*>(*it);
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if (!attr) {
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continue;
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}
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if (name == attr->get_name()) {
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JSObject *obj = getAttr(ctx, attr);
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hvp.setObject(*obj);
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return true;
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}
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}
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return true;
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}
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static bool
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attributes_get_property(JSContext *ctx, JS::HandleObject hobj, JS::HandleId hid, JS::MutableHandleValue hvp)
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{
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jsid id = hid.get();
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struct view_state *vs;
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JS::Value idval;
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JSCompartment *comp = js::GetContextCompartment(ctx);
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if (!comp) {
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return false;
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}
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struct ecmascript_interpreter *interpreter = JS_GetCompartmentPrivate(comp);
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/* This can be called if @obj if not itself an instance of the
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* appropriate class but has one in its prototype chain. Fail
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* such calls. */
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if (!JS_InstanceOf(ctx, hobj, &attributes_class, NULL)) {
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return false;
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}
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if (JSID_IS_INT(id)) {
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JS::RootedValue r_idval(ctx, idval);
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JS_IdToValue(ctx, id, &r_idval);
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int index = r_idval.toInt32();
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return attributes_item2(ctx, hobj, index, hvp);
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}
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#if 0
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if (JSID_IS_STRING(id)) {
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JS::RootedValue r_idval(ctx, idval);
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JS_IdToValue(ctx, id, &r_idval);
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char *string = JS_EncodeString(ctx, r_idval.toString());
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return attributes_namedItem2(ctx, hobj, string, hvp);
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}
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#endif
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return JS_PropertyStub(ctx, hobj, hid, hvp);
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}
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JSObject *
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getAttributes(JSContext *ctx, void *node)
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{
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JSObject *el = JS_NewObject(ctx, &attributes_class);
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if (!el) {
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return NULL;
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}
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JS::RootedObject r_el(ctx, el);
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JS_DefineProperties(ctx, r_el, (JSPropertySpec *) attributes_props);
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spidermonkey_DefineFunctions(ctx, el, attributes_funcs);
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JS_SetPrivate(el, node);
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return el;
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}
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static bool attr_get_property_name(JSContext *ctx, unsigned int argc, JS::Value *vp);
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static bool attr_get_property_value(JSContext *ctx, unsigned int argc, JS::Value *vp);
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JSClassOps attr_ops = {
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JS_PropertyStub, nullptr,
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JS_PropertyStub, JS_StrictPropertyStub,
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nullptr, nullptr, nullptr, nullptr
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};
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JSClass attr_class = {
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"attr",
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JSCLASS_HAS_PRIVATE,
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&attr_ops
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};
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static JSPropertySpec attr_props[] = {
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JS_PSG("name", attr_get_property_name, JSPROP_ENUMERATE),
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JS_PSG("value", attr_get_property_value, JSPROP_ENUMERATE),
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JS_PS_END
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};
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static bool
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attr_get_property_name(JSContext *ctx, unsigned int argc, JS::Value *vp)
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{
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JS::CallArgs args = CallArgsFromVp(argc, vp);
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JS::RootedObject hobj(ctx, &args.thisv().toObject());
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struct view_state *vs;
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JSCompartment *comp = js::GetContextCompartment(ctx);
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if (!comp) {
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return false;
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}
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struct ecmascript_interpreter *interpreter = JS_GetCompartmentPrivate(comp);
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/* This can be called if @obj if not itself an instance of the
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* appropriate class but has one in its prototype chain. Fail
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* such calls. */
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if (!JS_InstanceOf(ctx, hobj, &attr_class, NULL))
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return false;
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vs = interpreter->vs;
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if (!vs) {
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return false;
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}
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xmlpp::AttributeNode *attr = JS_GetPrivate(hobj);
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if (!attr) {
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args.rval().setNull();
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return true;
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}
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std::string v = attr->get_name();
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args.rval().setString(JS_NewStringCopyZ(ctx, v.c_str()));
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return true;
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}
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static bool
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attr_get_property_value(JSContext *ctx, unsigned int argc, JS::Value *vp)
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{
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JS::CallArgs args = CallArgsFromVp(argc, vp);
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JS::RootedObject hobj(ctx, &args.thisv().toObject());
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struct view_state *vs;
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JSCompartment *comp = js::GetContextCompartment(ctx);
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if (!comp) {
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return false;
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}
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struct ecmascript_interpreter *interpreter = JS_GetCompartmentPrivate(comp);
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/* This can be called if @obj if not itself an instance of the
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* appropriate class but has one in its prototype chain. Fail
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* such calls. */
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if (!JS_InstanceOf(ctx, hobj, &attr_class, NULL))
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return false;
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vs = interpreter->vs;
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if (!vs) {
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return false;
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}
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xmlpp::AttributeNode *attr = JS_GetPrivate(hobj);
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if (!attr) {
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args.rval().setNull();
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return true;
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}
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std::string v = attr->get_value();
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args.rval().setString(JS_NewStringCopyZ(ctx, v.c_str()));
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return true;
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}
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JSObject *
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getAttr(JSContext *ctx, void *node)
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{
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JSObject *el = JS_NewObject(ctx, &attr_class);
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if (!el) {
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return NULL;
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}
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JS::RootedObject r_el(ctx, el);
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JS_DefineProperties(ctx, r_el, (JSPropertySpec *) attr_props);
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// spidermonkey_DefineFunctions(ctx, el, attributes_funcs);
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JS_SetPrivate(el, node);
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return el;
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}
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@ -11,5 +11,7 @@ extern JSPropertySpec element_props[];
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JSObject *getElement(JSContext *ctx, void *node);
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JSObject *getCollection(JSContext *ctx, void *node);
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JSObject *getAttributes(JSContext *ctx, void *node);
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JSObject *getAttr(JSContext *ctx, void *node);
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#endif
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22
test/ecmascript/attributes.html
Normal file
22
test/ecmascript/attributes.html
Normal file
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@ -0,0 +1,22 @@
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<!DOCTYPE html>
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<html>
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<body>
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<p>Click the button to get the value of the onclick attribute of the button element.</p>
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<button onclick="myFunction()">Try it</button>
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<p><strong>Note:</strong> Internet Explorer 8 and earlier does not support the getNamedItem method.</p>
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<p id="demo"></p>
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<script>
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function myFunction() {
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var a = document.getElementsByTagName("BUTTON")[0];
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var x = a.attributes.getNamedItem('onclick').value;
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alert(x);
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}
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</script>
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</body>
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</html>
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