зеркало из https://github.com/mozilla/gecko-dev.git
341 строка
8.8 KiB
C
341 строка
8.8 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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* JS reflection of the Navigator Session History.
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*
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* Brendan Eich, 9/8/95
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*/
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#include "lm.h"
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#include "shist.h"
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#include "structs.h"
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enum hist_slot {
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HIST_LENGTH = -1,
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HIST_CURRENT = -2,
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HIST_PREVIOUS = -3,
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HIST_NEXT = -4
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};
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static JSPropertySpec hist_props[] = {
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{lm_length_str, HIST_LENGTH, JSPROP_ENUMERATE|JSPROP_READONLY},
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{"current", HIST_CURRENT, JSPROP_ENUMERATE|JSPROP_READONLY},
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{"previous", HIST_PREVIOUS, JSPROP_ENUMERATE|JSPROP_READONLY},
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{"next", HIST_NEXT, JSPROP_ENUMERATE|JSPROP_READONLY},
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{0}
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};
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typedef struct JSHistory {
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MochaDecoder *decoder;
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JSObject *object;
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} JSHistory;
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/*
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* DO NOT REMOVE:
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* forward decl of hist_go and early def of hist_forward to work
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* around a Win16 compiler bug!
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*/
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JSBool PR_CALLBACK
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hist_go(JSContext *cx, JSObject *obj, unsigned int argc, jsval *argv, jsval *rval);
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PR_STATIC_CALLBACK(JSBool)
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hist_forward(JSContext *cx, JSObject *obj, unsigned int argc, jsval *argv, jsval *rval)
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{
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jsval plus_one;
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plus_one = INT_TO_JSVAL(1);
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return hist_go(cx, obj, 1, &plus_one, rval);
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}
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extern JSClass lm_hist_class;
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PR_STATIC_CALLBACK(JSBool)
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hist_getProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
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{
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JSHistory *hist;
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MochaDecoder *decoder;
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MWContext *context;
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History_entry *he, *he2;
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JSString *str;
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XP_List *histlist;
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jsint slot;
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if (!JSVAL_IS_INT(id))
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return JS_TRUE;
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slot = JSVAL_TO_INT(id);
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hist = JS_GetInstancePrivate(cx, obj, &lm_hist_class, NULL);
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if (!hist)
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return JS_TRUE;
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decoder = hist->decoder;
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context = decoder->window_context;
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if (!context)
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return JS_TRUE;
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str = JSVAL_TO_STRING(JS_GetEmptyStringValue(cx));
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switch (slot) {
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case HIST_LENGTH:
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histlist = SHIST_GetList(context);
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*vp = INT_TO_JSVAL(XP_ListCount(histlist));
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return JS_TRUE;
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case HIST_CURRENT:
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if (!lm_CanAccessTarget(cx, JSTARGET_UNIVERSAL_BROWSER_READ))
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break;
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he = SHIST_GetCurrent(&context->hist);
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if (he && he->address)
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str = JS_NewStringCopyZ(cx, he->address);
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break;
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case HIST_PREVIOUS:
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if (!lm_CanAccessTarget(cx, JSTARGET_UNIVERSAL_BROWSER_READ))
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break;
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he2 = SHIST_GetPrevious(context);
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if (he2 && he2->address)
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str = JS_NewStringCopyZ(cx, he2->address);
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break;
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case HIST_NEXT:
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if (!lm_CanAccessTarget(cx, JSTARGET_UNIVERSAL_BROWSER_READ))
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break;
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he2 = SHIST_GetNext(context);
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if (he2 && he2->address)
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str = JS_NewStringCopyZ(cx, he2->address);
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break;
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default:
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if (slot < 0) {
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/* Don't mess with user-defined or method properties. */
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return JS_TRUE;
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}
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if (lm_CanAccessTarget(cx, JSTARGET_UNIVERSAL_BROWSER_READ)) {
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/* Access granted against potential privacy attack */
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he = SHIST_GetObjectNum(&context->hist, 1 + slot);
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if (he && he->address) {
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str = JS_NewStringCopyZ(cx, he->address);
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}
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}
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break;
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}
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/* Common tail code for string-type properties. */
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if (!str)
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return JS_FALSE;
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*vp = STRING_TO_JSVAL(str);
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return JS_TRUE;
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}
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PR_STATIC_CALLBACK(void)
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hist_finalize(JSContext *cx, JSObject *obj)
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{
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JSHistory *hist;
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hist = JS_GetPrivate(cx, obj);
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if (!hist)
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return;
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DROP_BACK_COUNT(hist->decoder);
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XP_DELETE(hist);
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}
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JSClass lm_hist_class = {
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"History", JSCLASS_HAS_PRIVATE,
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JS_PropertyStub, JS_PropertyStub, hist_getProperty, hist_getProperty,
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JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, hist_finalize
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};
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JSBool PR_CALLBACK
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hist_go(JSContext *cx, JSObject *obj,
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unsigned int argc, jsval *argv, jsval *rval)
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{
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JSHistory *hist;
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MochaDecoder *decoder;
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MWContext *context;
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History_entry *he;
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int index, delta;
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XP_List *histlist;
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URL_Struct *url_struct;
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if (!JS_InstanceOf(cx, obj, &lm_hist_class, argv))
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return JS_FALSE;
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hist = JS_GetPrivate(cx, obj);
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if (!hist)
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return JS_TRUE;
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decoder = hist->decoder;
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context = decoder->window_context;
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if (!context)
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return JS_TRUE;
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he = SHIST_GetCurrent(&context->hist);
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if (JSVAL_IS_INT(argv[0])) {
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index = SHIST_GetIndex(&context->hist, he);
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delta = JSVAL_TO_INT(argv[0]);
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index += delta;
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he = SHIST_GetObjectNum(&context->hist, index);
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}
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else if (JSVAL_IS_STRING(argv[0])) {
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/* i18n problem */
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/* I believe this part is broken for I18N. Particular after we change the he->title to UTF8 */
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char * argv_str = JS_GetStringBytes(JSVAL_TO_STRING(argv[0]));
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histlist = SHIST_GetList(context);
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if (histlist)
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histlist = histlist->next;
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for (index = XP_ListCount(histlist); index > 0; index--) {
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he = SHIST_GetObjectNum(&context->hist, index);
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if (XP_STRSTR(he->address, argv_str) ||
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XP_STRSTR(he->title, argv_str)) {
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goto out;
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}
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}
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he = 0;
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}
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else {
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he = 0;
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}
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if (!he)
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return JS_TRUE;
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out:
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url_struct = SHIST_CreateURLStructFromHistoryEntry(context, he);
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if (!url_struct) {
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JS_ReportOutOfMemory(cx);
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return JS_FALSE;
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}
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return lm_GetURL(cx, decoder, url_struct);
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}
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PR_STATIC_CALLBACK(JSBool)
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hist_back(JSContext *cx, JSObject *obj,
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unsigned int argc, jsval *argv, jsval *rval)
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{
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jsval minus_one;
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minus_one = INT_TO_JSVAL(-1);
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return hist_go(cx, obj, 1, &minus_one, rval);
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}
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PR_STATIC_CALLBACK(JSBool)
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hist_toString(JSContext *cx, JSObject *obj,
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unsigned int argc, jsval *argv, jsval *rval)
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{
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JSHistory *hist;
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MochaDecoder *decoder;
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MWContext *context;
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XP_List *histlist;
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History_entry *he;
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char *bytes;
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JSString *str;
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if (!JS_InstanceOf(cx, obj, &lm_hist_class, argv))
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return JS_FALSE;
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hist = JS_GetPrivate(cx, obj);
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if (!hist)
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return JS_TRUE;
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decoder = hist->decoder;
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context = decoder->window_context;
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if (!context)
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return JS_TRUE;
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histlist = SHIST_GetList(context);
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/* only build a string if we have permission */
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if (!lm_CanAccessTarget(cx, JSTARGET_UNIVERSAL_BROWSER_READ))
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return JS_TRUE;
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bytes = 0;
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StrAllocCopy(bytes, "<TITLE>Window History</TITLE>"
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"<TABLE BORDER=0 ALIGN=center VALIGN=top HSPACE=8>");
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while ((he = XP_ListNextObject(histlist)) != 0) {
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StrAllocCat(bytes, "<TR><TD VALIGN=top><STRONG>");
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/* i18n problem */
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/* I believe this part is broken for I18N. Particular after we change the he->title to UTF8 */
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/* force the output HTML to display as in UTF8 will fix it. */
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StrAllocCat(bytes, he->title);
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StrAllocCat(bytes, "</STRONG></TD><TD> </TD>"
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"<TD VALIGN=top><A HREF=\"");
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StrAllocCat(bytes, he->address);
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StrAllocCat(bytes, "\">");
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StrAllocCat(bytes, he->address);
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StrAllocCat(bytes, "</A></TD></TR>");
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}
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StrAllocCat(bytes, "</TABLE>");
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if (!bytes) {
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JS_ReportOutOfMemory(cx);
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return JS_FALSE;
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}
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str = JS_NewString(cx, bytes, XP_STRLEN(bytes));
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if (!str)
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return JS_FALSE;
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*rval = STRING_TO_JSVAL(str);
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return JS_TRUE;
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}
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static JSFunctionSpec hist_methods[] = {
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{"go", hist_go, 1},
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{"back", hist_back, 0},
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{"forward", hist_forward, 0},
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{lm_toString_str, hist_toString, 1},
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{0}
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};
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/* XXX avoid ntypes.h History typedef name clash */
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PR_STATIC_CALLBACK(JSBool)
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History_ctor(JSContext *cx, JSObject *obj,
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uint argc, jsval *argv, jsval *rval)
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{
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return JS_TRUE;
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}
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JSObject *
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lm_DefineHistory(MochaDecoder *decoder)
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{
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JSObject *obj;
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JSContext *cx;
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JSHistory *hist;
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obj = decoder->history;
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if (obj)
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return obj;
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cx = decoder->js_context;
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hist = JS_malloc(cx, sizeof *hist);
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if (!hist)
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return NULL;
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XP_BZERO(hist, sizeof *hist);
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obj = JS_InitClass(cx, decoder->window_object, NULL, &lm_hist_class,
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History_ctor, 0, hist_props, hist_methods, NULL, NULL);
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if (!obj || !JS_SetPrivate(cx, obj, hist)) {
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JS_free(cx, hist);
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return NULL;
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}
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if (!JS_DefineProperty(cx, decoder->window_object, "history",
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OBJECT_TO_JSVAL(obj), NULL, NULL,
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JSPROP_ENUMERATE|JSPROP_READONLY)) {
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return NULL;
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}
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hist->object = obj;
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hist->decoder = HOLD_BACK_COUNT(decoder);
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decoder->history = obj;
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return obj;
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}
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