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authorMoonchild <moonchild@palemoon.org>2022-01-30 22:19:50 +0000
committerMoonchild <moonchild@palemoon.org>2022-04-08 20:28:55 +0200
commitae8cc0e398df8c172561434375600fd3300160ab (patch)
tree1b166cdbed036d9e40b94b2b068e3513bc85cdf4
parent7d49b154e2275701fd5e65ac8990ee45e30bb69d (diff)
downloaduxp-ae8cc0e398df8c172561434375600fd3300160ab.tar.gz
Issue #1836 - Implement Selection.setBaseAndExtent()
-rw-r--r--dom/webidl/Selection.webidl6
-rw-r--r--layout/generic/Selection.h4
-rw-r--r--layout/generic/nsSelection.cpp49
3 files changed, 59 insertions, 0 deletions
diff --git a/dom/webidl/Selection.webidl b/dom/webidl/Selection.webidl
index c3eac016cb..2b85b87f90 100644
--- a/dom/webidl/Selection.webidl
+++ b/dom/webidl/Selection.webidl
@@ -46,6 +46,12 @@ interface Selection {
[Throws]
boolean containsNode(Node node, boolean allowPartialContainment);
+ [Throws]
+ void setBaseAndExtent(Node anchorNode,
+ unsigned long anchorOffset,
+ Node focusNode,
+ unsigned long focusOffset);
+
stringifier;
};
diff --git a/layout/generic/Selection.h b/layout/generic/Selection.h
index 1e703b4669..83a2e2c688 100644
--- a/layout/generic/Selection.h
+++ b/layout/generic/Selection.h
@@ -207,6 +207,10 @@ public:
void Modify(const nsAString& aAlter, const nsAString& aDirection,
const nsAString& aGranularity, mozilla::ErrorResult& aRv);
+ void SetBaseAndExtent(nsINode& aAnchorNode, uint32_t aAnchorOffset,
+ nsINode& aFocusNode, uint32_t aFocusOffset,
+ mozilla::ErrorResult& aRv);
+
bool GetInterlinePosition(mozilla::ErrorResult& aRv);
void SetInterlinePosition(bool aValue, mozilla::ErrorResult& aRv);
diff --git a/layout/generic/nsSelection.cpp b/layout/generic/nsSelection.cpp
index 3f8d11b486..301d799525 100644
--- a/layout/generic/nsSelection.cpp
+++ b/layout/generic/nsSelection.cpp
@@ -6434,6 +6434,55 @@ Selection::Modify(const nsAString& aAlter, const nsAString& aDirection,
}
}
+void
+Selection::SetBaseAndExtent(nsINode& aAnchorNode, uint32_t aAnchorOffset,
+ nsINode& aFocusNode, uint32_t aFocusOffset,
+ ErrorResult& aRv)
+{
+ if (!mFrameSelection) {
+ return;
+ }
+
+ SelectionBatcher batch(this);
+
+ int32_t relativePosition =
+ nsContentUtils::ComparePoints(&aAnchorNode, aAnchorOffset,
+ &aFocusNode, aFocusOffset);
+ nsINode* start = &aAnchorNode;
+ nsINode* end = &aFocusNode;
+ uint32_t startOffset = aAnchorOffset;
+ uint32_t endOffset = aFocusOffset;
+ if (relativePosition > 0) {
+ start = &aFocusNode;
+ end = &aAnchorNode;
+ startOffset = aFocusOffset;
+ endOffset = aAnchorOffset;
+ }
+
+ RefPtr<nsRange> newRange;
+ nsresult rv = nsRange::CreateRange(start, startOffset, end, endOffset,
+ getter_AddRefs(newRange));
+ // CreateRange returns IndexSizeError if any offset is out of bounds.
+ if (NS_FAILED(rv)) {
+ aRv.Throw(rv);
+ return;
+ }
+
+ rv = RemoveAllRanges();
+ if (NS_FAILED(rv)) {
+ aRv.Throw(rv);
+ return;
+ }
+
+ rv = AddRange(newRange);
+ if (NS_FAILED(rv)) {
+ aRv.Throw(rv);
+ return;
+ }
+
+ SetDirection(relativePosition > 0 ? eDirPrevious : eDirNext);
+}
+
/** SelectionLanguageChange modifies the cursor Bidi level after a change in keyboard direction
* @param aLangRTL is true if the new language is right-to-left or false if the new language is left-to-right
*/