Index: third_party/WebKit/Source/core/layout/ng/ng_line_height_metrics.h |
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_line_height_metrics.h b/third_party/WebKit/Source/core/layout/ng/ng_line_height_metrics.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..9b5a1e90ef1d16d4a0c9224d92de9864cf65b4dc |
--- /dev/null |
+++ b/third_party/WebKit/Source/core/layout/ng/ng_line_height_metrics.h |
@@ -0,0 +1,46 @@ |
+// Copyright 2017 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef NGLineHeightMetrics_h |
+#define NGLineHeightMetrics_h |
+ |
+#include "core/CoreExport.h" |
+#include "core/layout/ng/ng_physical_fragment.h" |
+#include "platform/fonts/FontBaseline.h" |
+ |
+namespace blink { |
+ |
+class ComputedStyle; |
+class FontMetrics; |
+ |
+// Represents line-progression metrics for line boxes and inline boxes. |
+struct NGLineHeightMetrics { |
+ NGLineHeightMetrics() {} |
+ |
+ // Use the leading from the 'line-height' property, or the font metrics of |
+ // the primary font if 'line-height: normal'. |
+ NGLineHeightMetrics(const ComputedStyle&, FontBaseline); |
+ |
+ // Use the leading from the font metrics. |
+ NGLineHeightMetrics(const FontMetrics&, FontBaseline); |
+ |
+ void Unite(const NGLineHeightMetrics&); |
+ |
+ // TODO(kojii): Replace these floats with LayoutUnit. |
+ float ascent = 0; |
+ float descent = 0; |
+ float ascent_and_leading = 0; |
+ float descent_and_leading = 0; |
+ |
+ LayoutUnit LineHeight() const { |
+ return LayoutUnit(ascent_and_leading + descent_and_leading); |
+ } |
+ |
+ private: |
+ void Initialize(const FontMetrics&, FontBaseline, float line_height); |
+}; |
+ |
+} // namespace blink |
+ |
+#endif // NGLineHeightMetrics_h |