1 files changed, 230 insertions, 0 deletions
diff --git a/devtools/client/shared/components/object-inspector/utils/load-properties.js b/devtools/client/shared/components/object-inspector/utils/load-properties.js
new file mode 100644
index 0000000000..8609e1d3e4
--- /dev/null
+++ b/devtools/client/shared/components/object-inspector/utils/load-properties.js
@@ -0,0 +1,230 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+const {
+  enumEntries,
+  enumIndexedProperties,
+  enumNonIndexedProperties,
+  getPrototype,
+  enumSymbols,
+  getFullText,
+  getPromiseState,
+  getProxySlots,
+} = require("devtools/client/shared/components/object-inspector/utils/client");
+
+const {
+  getClosestGripNode,
+  getClosestNonBucketNode,
+  getFront,
+  getValue,
+  nodeHasAccessors,
+  nodeHasProperties,
+  nodeIsBucket,
+  nodeIsDefaultProperties,
+  nodeIsEntries,
+  nodeIsMapEntry,
+  nodeIsPrimitive,
+  nodeIsPromise,
+  nodeIsProxy,
+  nodeNeedsNumericalBuckets,
+  nodeIsLongString,
+} = require("devtools/client/shared/components/object-inspector/utils/node");
+
+function loadItemProperties(item, client, loadedProperties) {
+  const gripItem = getClosestGripNode(item);
+  const value = getValue(gripItem);
+  let front = getFront(gripItem);
+
+  if (!front && value && client && client.getFrontByID) {
+    front = client.getFrontByID(value.actor);
+  }
+
+  const getObjectFront = function() {
+    if (!front) {
+      front = client.createObjectFront(value);
+    }
+
+    return front;
+  };
+
+  const [start, end] = item.meta
+    ? [item.meta.startIndex, item.meta.endIndex]
+    : [];
+
+  const promises = [];
+
+  if (shouldLoadItemIndexedProperties(item, loadedProperties)) {
+    promises.push(enumIndexedProperties(getObjectFront(), start, end));
+  }
+
+  if (shouldLoadItemNonIndexedProperties(item, loadedProperties)) {
+    promises.push(enumNonIndexedProperties(getObjectFront(), start, end));
+  }
+
+  if (shouldLoadItemEntries(item, loadedProperties)) {
+    promises.push(enumEntries(getObjectFront(), start, end));
+  }
+
+  if (shouldLoadItemPrototype(item, loadedProperties)) {
+    promises.push(getPrototype(getObjectFront()));
+  }
+
+  if (shouldLoadItemSymbols(item, loadedProperties)) {
+    promises.push(enumSymbols(getObjectFront(), start, end));
+  }
+
+  if (shouldLoadItemFullText(item, loadedProperties)) {
+    const longStringFront = front || client.createLongStringFront(value);
+    promises.push(getFullText(longStringFront, item));
+  }
+
+  if (shouldLoadItemPromiseState(item, loadedProperties)) {
+    promises.push(getPromiseState(getObjectFront()));
+  }
+
+  if (shouldLoadItemProxySlots(item, loadedProperties)) {
+    promises.push(getProxySlots(getObjectFront()));
+  }
+
+  return Promise.all(promises).then(mergeResponses);
+}
+
+function mergeResponses(responses) {
+  const data = {};
+
+  for (const response of responses) {
+    if (response.hasOwnProperty("ownProperties")) {
+      data.ownProperties = { ...data.ownProperties, ...response.ownProperties };
+    }
+
+    if (response.ownSymbols && response.ownSymbols.length > 0) {
+      data.ownSymbols = response.ownSymbols;
+    }
+
+    if (response.prototype) {
+      data.prototype = response.prototype;
+    }
+
+    if (response.fullText) {
+      data.fullText = response.fullText;
+    }
+
+    if (response.promiseState) {
+      data.promiseState = response.promiseState;
+    }
+
+    if (response.proxyTarget && response.proxyHandler) {
+      data.proxyTarget = response.proxyTarget;
+      data.proxyHandler = response.proxyHandler;
+    }
+  }
+
+  return data;
+}
+
+function shouldLoadItemIndexedProperties(item, loadedProperties = new Map()) {
+  const gripItem = getClosestGripNode(item);
+  const value = getValue(gripItem);
+
+  return (
+    value &&
+    nodeHasProperties(gripItem) &&
+    !loadedProperties.has(item.path) &&
+    !nodeIsProxy(item) &&
+    !nodeNeedsNumericalBuckets(item) &&
+    !nodeIsEntries(getClosestNonBucketNode(item)) &&
+    // The data is loaded when expanding the window node.
+    !nodeIsDefaultProperties(item)
+  );
+}
+
+function shouldLoadItemNonIndexedProperties(
+  item,
+  loadedProperties = new Map()
+) {
+  const gripItem = getClosestGripNode(item);
+  const value = getValue(gripItem);
+
+  return (
+    value &&
+    nodeHasProperties(gripItem) &&
+    !loadedProperties.has(item.path) &&
+    !nodeIsProxy(item) &&
+    !nodeIsEntries(getClosestNonBucketNode(item)) &&
+    !nodeIsBucket(item) &&
+    // The data is loaded when expanding the window node.
+    !nodeIsDefaultProperties(item)
+  );
+}
+
+function shouldLoadItemEntries(item, loadedProperties = new Map()) {
+  const gripItem = getClosestGripNode(item);
+  const value = getValue(gripItem);
+
+  return (
+    value &&
+    nodeIsEntries(getClosestNonBucketNode(item)) &&
+    !loadedProperties.has(item.path) &&
+    !nodeNeedsNumericalBuckets(item)
+  );
+}
+
+function shouldLoadItemPrototype(item, loadedProperties = new Map()) {
+  const value = getValue(item);
+
+  return (
+    value &&
+    !loadedProperties.has(item.path) &&
+    !nodeIsBucket(item) &&
+    !nodeIsMapEntry(item) &&
+    !nodeIsEntries(item) &&
+    !nodeIsDefaultProperties(item) &&
+    !nodeHasAccessors(item) &&
+    !nodeIsPrimitive(item) &&
+    !nodeIsLongString(item) &&
+    !nodeIsProxy(item)
+  );
+}
+
+function shouldLoadItemSymbols(item, loadedProperties = new Map()) {
+  const value = getValue(item);
+
+  return (
+    value &&
+    !loadedProperties.has(item.path) &&
+    !nodeIsBucket(item) &&
+    !nodeIsMapEntry(item) &&
+    !nodeIsEntries(item) &&
+    !nodeIsDefaultProperties(item) &&
+    !nodeHasAccessors(item) &&
+    !nodeIsPrimitive(item) &&
+    !nodeIsLongString(item) &&
+    !nodeIsProxy(item)
+  );
+}
+
+function shouldLoadItemFullText(item, loadedProperties = new Map()) {
+  return !loadedProperties.has(item.path) && nodeIsLongString(item);
+}
+
+function shouldLoadItemPromiseState(item, loadedProperties = new Map()) {
+  return !loadedProperties.has(item.path) && nodeIsPromise(item);
+}
+
+function shouldLoadItemProxySlots(item, loadedProperties = new Map()) {
+  return !loadedProperties.has(item.path) && nodeIsProxy(item);
+}
+
+module.exports = {
+  loadItemProperties,
+  mergeResponses,
+  shouldLoadItemEntries,
+  shouldLoadItemIndexedProperties,
+  shouldLoadItemNonIndexedProperties,
+  shouldLoadItemPrototype,
+  shouldLoadItemSymbols,
+  shouldLoadItemFullText,
+  shouldLoadItemPromiseState,
+  shouldLoadItemProxySlots,
+};