Add m-esr52 at 52.6.0

1 files changed, 165 insertions, 0 deletions

diff --git a/layout/style/generate-stylestructlist.py b/layout/style/generate-stylestructlist.py
new file mode 100755
index 000000000..346a7deae
--- /dev/null
+++ b/layout/style/generate-stylestructlist.py
@@ -0,0 +1,165 @@
+#!/usr/bin/env python
+
+# 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/.
+
+# This script generates nsStyleStructList.h, which contains macro invocations
+# that can be used for three things:
+#
+# 1. To generate code for each inherited style struct.
+# 2. To generate code for each reset style struct.
+# 3. To generate the dependency of each style struct.
+
+from __future__ import print_function
+
+import math
+
+NORMAL_DEP = ["Variables"]
+COLOR_DEP = ["Color"]
+LENGTH_DEP = ["Font", "Visibility"]
+
+# List of style structs and their corresponding Check callback functions,
+# if any.
+STYLE_STRUCTS = [("INHERITED",) + x for x in [
+    # Inherited style structs.
+    ("Font",           "CheckFontCallback",     NORMAL_DEP + ["Visibility"]),
+    ("Color",          "CheckColorCallback",    NORMAL_DEP),
+    ("List",           "nullptr",               NORMAL_DEP + LENGTH_DEP),
+    ("Text",           "CheckTextCallback",     NORMAL_DEP + LENGTH_DEP + COLOR_DEP),
+    ("Visibility",     "nullptr",               NORMAL_DEP),
+    ("UserInterface",  "nullptr",               NORMAL_DEP),
+    ("TableBorder",    "nullptr",               NORMAL_DEP + LENGTH_DEP),
+    ("SVG",            "nullptr",               NORMAL_DEP + LENGTH_DEP + COLOR_DEP),
+    ("Variables",      "CheckVariablesCallback",[]),
+]] + [("RESET",) + x for x in [
+    # Reset style structs.
+    ("Background",     "nullptr",   NORMAL_DEP + LENGTH_DEP + COLOR_DEP),
+    ("Position",       "nullptr",   NORMAL_DEP + LENGTH_DEP),
+    ("TextReset",      "nullptr",   NORMAL_DEP + LENGTH_DEP + COLOR_DEP),
+    ("Display",        "nullptr",   NORMAL_DEP + LENGTH_DEP),
+    ("Content",        "nullptr",   NORMAL_DEP + LENGTH_DEP),
+    ("UIReset",        "nullptr",   NORMAL_DEP),
+    ("Table",          "nullptr",   NORMAL_DEP),
+    ("Margin",         "nullptr",   NORMAL_DEP + LENGTH_DEP),
+    ("Padding",        "nullptr",   NORMAL_DEP + LENGTH_DEP),
+    ("Border",         "nullptr",   NORMAL_DEP + LENGTH_DEP + COLOR_DEP),
+    ("Outline",        "nullptr",   NORMAL_DEP + LENGTH_DEP + COLOR_DEP),
+    ("XUL",            "nullptr",   NORMAL_DEP),
+    ("SVGReset",       "nullptr",   NORMAL_DEP + LENGTH_DEP + COLOR_DEP),
+    ("Column",         "nullptr",   NORMAL_DEP + LENGTH_DEP + COLOR_DEP),
+    ("Effects",        "nullptr",   NORMAL_DEP + LENGTH_DEP + COLOR_DEP),
+]]
+
+
+# ---- Generate nsStyleStructList.h ----
+
+count = len(STYLE_STRUCTS)
+
+# Check for problems with style struct dependencies
+resolved_items = []
+# This whole loop tries to sort the style structs in topological order
+# according to the dependencies. A topological order exists iff there
+# are no cyclic dependencies between the style structs. It resolves one
+# struct each iteration, and append the resolved one to |resolved_items|.
+for i in range(count):
+    # This inner loop picks one style struct which does not have
+    # unsolved dependencies. If nothing can be picked, then we
+    # must have some cyclic dependencies.
+    for j in range(count):
+        _, name, _, dependencies = STYLE_STRUCTS[j]
+        if name in resolved_items:
+            continue
+        # Check whether all dependencies of this item have been placed
+        for dep in dependencies:
+            if dep not in resolved_items:
+                break
+        else:
+            resolved_items.append(name)
+            break
+    else:
+        import sys
+        print("ERROR: Cannot resolve style struct dependencies", file=sys.stderr)
+        print("Resolved items:", " ".join(resolved_items), file=sys.stderr)
+        unsolved_items = [name for _, name, _, _ in STYLE_STRUCTS
+                          if name not in resolved_items]
+        print("There exist cyclic dependencies between " +
+                  "the following structs:", " ".join(unsolved_items), file=sys.stderr)
+        exit(1)
+
+def printEntry(header, i):
+    print("STYLE_STRUCT_%s(%s, %s)" % STYLE_STRUCTS[i][:3], file=header)
+    for dep in STYLE_STRUCTS[i][3]:
+        print("STYLE_STRUCT_DEP(%s)" % (dep,), file=header)
+    print("STYLE_STRUCT_END()", file=header)
+
+HEADER = """/* THIS FILE IS AUTOGENERATED BY generate-stylestructlist.py - DO NOT EDIT */
+
+// IWYU pragma: private, include "nsStyleStructFwd.h"
+
+/*
+ * list of structs that contain the data provided by nsStyleContext, the
+ * internal API for computed style data for an element
+ */
+
+/*
+ * This file is intended to be used by different parts of the code, with
+ * the STYLE_STRUCT macro (or the STYLE_STRUCT_INHERITED and
+ * STYLE_STRUCT_RESET pair of macros) defined in different ways.
+ */
+
+#ifndef STYLE_STRUCT_INHERITED
+#define STYLE_STRUCT_INHERITED(name, checkdata_cb) \\
+  STYLE_STRUCT(name, checkdata_cb)
+#define UNDEF_STYLE_STRUCT_INHERITED
+#endif
+
+#ifndef STYLE_STRUCT_RESET
+#define STYLE_STRUCT_RESET(name, checkdata_cb) \\
+  STYLE_STRUCT(name, checkdata_cb)
+#define UNDEF_STYLE_STRUCT_RESET
+#endif
+
+#ifndef STYLE_STRUCT_DEP
+#define STYLE_STRUCT_DEP(dep)
+#define UNDEF_STYLE_STRUCT_DEP
+#endif
+
+#ifndef STYLE_STRUCT_END
+#define STYLE_STRUCT_END()
+#define UNDEF_STYLE_STRUCT_END
+#endif
+
+// The inherited structs are listed before the Reset structs.
+// nsStyleStructID assumes this is the case, and callers other than
+// nsStyleStructFwd.h that want the structs in id-order just define
+// STYLE_STRUCT rather than including the file twice.
+
+"""
+FOOTER = """
+#ifdef UNDEF_STYLE_STRUCT_INHERITED
+#undef STYLE_STRUCT_INHERITED
+#undef UNDEF_STYLE_STRUCT_INHERITED
+#endif
+
+#ifdef UNDEF_STYLE_STRUCT_RESET
+#undef STYLE_STRUCT_RESET
+#undef UNDEF_STYLE_STRUCT_RESET
+#endif
+
+#ifdef UNDEF_STYLE_STRUCT_DEP
+#undef STYLE_STRUCT_DEP
+#undef UNDEF_STYLE_STRUCT_DEP
+#endif
+
+#ifdef UNDEF_STYLE_STRUCT_END
+#undef STYLE_STRUCT_END
+#undef UNDEF_STYLE_STRUCT_END
+#endif
+"""
+
+def main(header):
+    print(HEADER, file=header)
+    for i in range(count):
+        printEntry(header, i)
+    print(FOOTER, file=header)