gecko-dev/lib/libmocha/lm_hist.c

336 строки
8.5 KiB
C

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