jscript: Added String.trim implementation.

dlls/jscript/string.c

@@ -63,6 +63,7 @@ static const WCHAR toLowerCaseW[] = {'t','o','L','o','w','e','r','C','a','s','e'
 static const WCHAR toUpperCaseW[] = {'t','o','U','p','p','e','r','C','a','s','e',0};
 static const WCHAR toLocaleLowerCaseW[] = {'t','o','L','o','c','a','l','e','L','o','w','e','r','C','a','s','e',0};
 static const WCHAR toLocaleUpperCaseW[] = {'t','o','L','o','c','a','l','e','U','p','p','e','r','C','a','s','e',0};
+static const WCHAR trimW[] = {'t','r','i','m',0};
 static const WCHAR localeCompareW[] = {'l','o','c','a','l','e','C','o','m','p','a','r','e',0};
 static const WCHAR fromCharCodeW[] = {'f','r','o','m','C','h','a','r','C','o','d','e',0};
 
@@ -1465,6 +1466,41 @@ static HRESULT String_toLocaleUpperCase(script_ctx_t *ctx, vdisp_t *jsthis, WORD
     return E_NOTIMPL;
 }
 
+static HRESULT String_trim(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc,
+        jsval_t *argv, jsval_t *r)
+{
+    const WCHAR *str, *begin, *end;
+    jsstr_t *jsstr;
+    unsigned len;
+    HRESULT hres;
+
+    hres = to_flat_string(ctx, jsval_disp(jsthis->u.disp), &jsstr, &str);
+    if(FAILED(hres)) {
+        WARN("to_flat_string failed: %08x\n", hres);
+        return hres;
+    }
+    len = jsstr_length(jsstr);
+    TRACE("%s\n", debugstr_wn(str, len));
+
+    for(begin = str, end = str + len; begin < end && isspaceW(*begin); begin++);
+    while(end > begin + 1 && isspaceW(*(end-1))) end--;
+
+    if(r) {
+        jsstr_t *ret;
+
+        if(begin == str && end == str + len)
+            ret = jsstr_addref(jsstr);
+        else
+            ret = jsstr_alloc_len(begin, end - begin);
+        if(ret)
+            *r = jsval_string(ret);
+        else
+            hres = E_OUTOFMEMORY;
+    }
+    jsstr_release(jsstr);
+    return hres;
+}
+
 static HRESULT String_localeCompare(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, jsval_t *argv,
         jsval_t *r)
 {
@@ -1552,6 +1588,7 @@ static const builtin_prop_t String_props[] = {
     {toLowerCaseW,           String_toLowerCase,           PROPF_METHOD},
     {toStringW,              String_toString,              PROPF_METHOD},
     {toUpperCaseW,           String_toUpperCase,           PROPF_METHOD},
+    {trimW,                  String_trim,                  PROPF_ES5|PROPF_METHOD},
     {valueOfW,               String_valueOf,               PROPF_METHOD}
 };
 

dlls/mshtml/tests/documentmode.js

@@ -142,6 +142,8 @@ function test_javascript() {
     test_exposed("toISOString", Date.prototype, v >= 9);
     test_exposed("isArray", Array, v >= 9);
     test_exposed("indexOf", Array.prototype, v >= 9);
+    test_exposed("trim", String.prototype, v >= 9);
+
     /* FIXME: IE8 implements weird semi-functional property descriptors. */
     if(v != 8) {
         test_exposed("getOwnPropertyDescriptor", Object, v >= 8);

dlls/mshtml/tests/es5.js

@@ -427,6 +427,22 @@ function test_defineProperty() {
     next_test();
 }
 
+function test_string_trim() {
+    function test_trim(value, expected) {
+        var r = String.prototype.trim.call(value);
+        ok(r === expected, "trim(" + value + ") = " + r);
+    }
+
+    test_trim("test", "test");
+    test_trim(false, "false");
+    test_trim("\n \t\rte st\t\t\n", "te st");
+    test_trim({ toString: function() { return " test "; } }, "test");
+    test_trim("", "");
+    test_trim(" \t\n", "");
+
+    next_test();
+}
+
 function test_global_properties() {
     var o;
 
@@ -452,5 +468,6 @@ var tests = [
     test_identifier_keywords,
     test_getOwnPropertyDescriptor,
     test_defineProperty,
+    test_string_trim,
     test_global_properties
 ];