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gecko-dev/include/libmocha.h

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/* -*- 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.
*/
/*
* Header file for Mocha in the Navigator (libmocha).
*/
#ifndef libmocha_h___
#define libmocha_h___
#include "ntypes.h"
#include "il_types.h"
#include "prtypes.h"
#include "plhash.h"
#include "prthread.h"
#include "jsapi.h"
/* enable JavaScript Debugger support */
#if defined (_WIN32) || defined(XP_UNIX) || defined(powerc) || defined(__powerc) || defined(XP_OS2)
#ifdef JAVA
#define JSDEBUGGER 1
#endif
#endif
NSPR_BEGIN_EXTERN_C
typedef struct JSTimeout JSTimeout;
typedef struct JSPrincipalsList JSPrincipalsList;
typedef struct JSNestingUrl JSNestingUrl;
/*
* There exists one MochaDecoder per top-level MWContext that decodes Mocha,
* either from an HTML page or from a "mocha:[expr]" URL.
*/
typedef struct MochaDecoder {
int32 forw_count; /* forward reference count */
int32 back_count; /* back (up the tree) count */
JSContext *js_context;
MWContext *window_context;
JSObject *window_object;
NET_StreamClass *stream;
int32 stream_owner; /* id of layer that's loading the stream */
URL_Struct *url_struct;
JSTimeout *timeouts;
JSTimeout *saved_timeouts;
uint16 signature_ordinal;
PRPackedBool replace_location;
PRPackedBool resize_reload;
PRPackedBool load_event_sent;
PRPackedBool visited;
PRPackedBool writing_input;
PRPackedBool free_stream_on_close;
PRPackedBool in_window_quota;
PRPackedBool called_win_close;
PRPackedBool principals_compromised;
const char *source_url;
JSNestingUrl *nesting_url;
uint32 error_count;
uint32 event_mask;
int32 active_layer_id;
uint32 active_form_id;
uint32 event_bit;
int32 doc_id;
/*
* Class prototype objects, in alphabetical order. Must be CLEARed (set
* to null) in LM_PutMochaDecoder, HELD (GC roots added) in lm_NewWindow,
* and DROPped (removed as GC roots) in lm_DestroyWindow.
* XXXbe clean up, clear via bzero, using a sub-structure.
*/
JSObject *anchor_prototype;
JSObject *bar_prototype;
JSObject *document_prototype;
JSObject *event_prototype;
JSObject *event_capturer_prototype;
JSObject *event_receiver_prototype;
JSObject *form_prototype;
JSObject *image_prototype;
JSObject *input_prototype;
JSObject *layer_prototype;
JSObject *option_prototype;
JSObject *rect_prototype;
JSObject *url_prototype;
#ifdef DOM
JSObject *span_prototype;
JSObject *transclusion_prototype;
#endif
/*
* Window sub-objects. These must also follow the CLEAR/HOLD/DROP
* protocol mentioned above.
*/
JSObject *document;
JSObject *history;
JSObject *location;
JSObject *navigator;
JSObject *components;
JSObject *screen;
JSObject *hardware;
JSObject *crypto;
JSObject *pkcs11;
/*
* Ad-hoc GC roots.
*/
JSObject *event_receiver;
JSObject *opener;
JSVersion firstVersion; /* First JS script tag version. */
/*
* Security info for all of this decoder's scripts, except those
* contained in layers.
*/
JSPrincipals *principals;
JSPrincipalsList*early_access_list;
IL_GroupContext *image_context; /* Image context for anonymous images */
/*
* Table that maintains an id to JS object mapping for reflected
* elements. This is used during resize to reestablish the connection
* between layout elements and their corresponding JS object.
* Form elements are special, since they can't use the same keying
*/
PRHashTable *id_to_object_map;
} MochaDecoder;
/*
* Number of buckets for the id-to-object hash table.
*/
#define LM_ID_TO_OBJ_MAP_SIZE 20
#define LM_FORM_ELEMENT_MAP_SIZE 10
/*
* Types of objects reflected into Mocha
*/
typedef enum {
LM_APPLETS = 0,
LM_FORMS,
LM_LINKS,
LM_NAMEDANCHORS,
LM_EMBEDS,
LM_IMAGES,
LM_FORMELEMENTS,
LM_LAYERS
#ifdef DOM
, LM_SPANS
, LM_TRANSCLUSIONS
#endif
} ReflectedObject;
#ifdef DOM
/*
* Construct a DOM_Node for the given tag and add it to the tree.
*/
void /* DOM_Node */ *
LM_ReflectTagNode(PA_Tag *tag, void /*lo_TopState*/ *top_state,
MWContext *context);
#endif
/*
* Generates an id-to-object mapping key from the ReflectedObject
* type, the containing layer id and the id of the object itself.
* The key is 4 bits type, 14 bits layer_id and 14 bits id.
*/
#define LM_GET_MAPPING_KEY(obj_type, layer_id, id) \
(void *)(((((uint32)obj_type) << 28) & 0xF0000000UL) | \
((((uint32)layer_id) << 14) & 0x0FFFC000UL) | \
(((uint32)id) & 0x00003FFFUL))
/*
* Public, well-known string constants.
*/
extern char js_language_name[]; /* "JavaScript" */
extern char js_content_type[]; /* "application/x-javascript" */
/*
* Initialize and finalize Mocha-in-the-client.
*/
extern void LM_InitMocha(void);
extern void LM_FinishMocha(void);
/*
* Force mocha on in the given context, even if the user pref is set to
* disable mocha.
*/
extern void LM_ForceJSEnabled(MWContext *cx);
/*
* Initialize and finalize Mocha-Java connection
*/
#define LM_MOJA_UNINITIALIZED 0
#define LM_MOJA_OK 1
#define LM_MOJA_JAVA_FAILED 2
#define LM_MOJA_OUT_OF_MEMORY 3
extern int LM_InitMoja(void);
extern void LM_FinishMoja(void);
extern int LM_IsMojaInitialized(void);
/*
* Enter or leave the big mocha lock. Any thread which wants to
* preserve JavaScript run-to-completion semantics must bracket
* JavaScript evaluation with these calls.
*/
typedef void
(PR_CALLBACK *JSLockReleaseFunc)(void * data);
#ifdef OJI
extern JSBool PR_CALLBACK LM_LockJS(char **errp);
#else
extern void PR_CALLBACK LM_LockJS(void);
#endif
extern void PR_CALLBACK LM_UnlockJS(void);
extern JSBool PR_CALLBACK LM_AttemptLockJS(JSLockReleaseFunc fn, void * data);
extern JSBool PR_CALLBACK LM_ClearAttemptLockJS(JSLockReleaseFunc fn, void * data);
extern PRBool PR_CALLBACK
LM_HandOffJSLock(PRThread * oldOwner, PRThread *newOwner);
/*
* For interruption purposes we will sometimes need to know the
* context who is holding the JS lock
*/
extern void LM_JSLockSetContext(MWContext * context);
extern MWContext * LM_JSLockGetContext(void);
/*
* Enable/disable for Mocha-in-the-client.
*/
#define LM_SwitchMocha(toggle) LM_SetMochaEnabled(toggle)
extern JSBool
LM_GetMochaEnabled(void);
/*
* Get (create if necessary) a MochaDecoder for context, adding a reference
* to its window_object. Put drops the reference, destroying window_object
* when the count reaches zero. These functions should only be called in
* the mocha thread or while holding the JS-lock
*/
extern MochaDecoder *
LM_GetMochaDecoder(MWContext *context);
extern void
LM_PutMochaDecoder(MochaDecoder *decoder);
/*
* Get the source URL for script being loaded by document. This URL will be
* the document's URL for inline script, or the SRC= URL for included script.
* The returned pointer is safe only within the extent of the function that
* calls LM_GetSourceURL().
*/
extern const char *
LM_GetSourceURL(MochaDecoder *decoder);
/*
* Set the current layer and hence the current scope for script evaluation.
*/
extern void
LM_SetActiveLayer(MWContext * context, int32 layer_id);
/*
* Get the current layer and hence the current scope for script evaluation.
*/
extern int32
LM_GetActiveLayer(MWContext * context);
/*
* Evaluate the contents of a SCRIPT tag. You can specify the JSObject
* to use as the base scope. Pass NULL to use the default window_object
*/
extern JSBool
LM_EvaluateBuffer(MochaDecoder *decoder, void *base, size_t length,
uint lineno, char * scope_to, struct JSPrincipals *principals,
JSBool unicode, jsval *result);
/*
* Evaluate an expression entity in an HTML attribute (WIDTH="&{height/2};").
* Returns null on error, otherwise a pointer to the malloc'd string result.
* The caller is responsible for freeing the string result.
*/
extern char *
LM_EvaluateAttribute(MWContext *context, char *expr, uint lineno);
/*
* Remove any MochaDecoder window_context pointer to an MWContext that's
* being destroyed.
*/
extern void
LM_RemoveWindowContext(MWContext *context, History_entry * he);
extern void
LM_DropSavedWindow(MWContext *context, void *window);
/*
* Set and clear the HTML stream and URL for the MochaDecoder
* associated with the given context
*/
extern JSBool
LM_SetDecoderStream(MWContext * context, NET_StreamClass *stream,
URL_Struct *url_struct, JSBool free_stream_on_close);
/*
* Start caching HTML or plain text generated by document.write() where the
* script is running on mc, the document is being generated into decoder's
* window, and url_struct tells about the generator.
*/
extern NET_StreamClass *
LM_WysiwygCacheConverter(MWContext *context, URL_Struct *url_struct,
const char * wysiwyg_url, const char * base_href);
/*
* Skip over the "wysiwyg://docid/" in url_string and return a pointer to the
* real URL hidden after the prefix. If url_string is not of "wysiwyg:" type,
* just return url_string. Never returns null.
*/
extern const char *
LM_StripWysiwygURLPrefix(const char *url_string);
/*
* This function works only on "wysiwyg:" type URLs -- don't call it unless
* you know that NET_URL_Type(url_string) is WYSIWYG_TYPE_URL. It'll return
* null if url_string seems too short, or if it can't find the third slash.
*/
extern const char *
LM_SkipWysiwygURLPrefix(const char *url_string);
/*
* Return a pointer to a malloc'd string of the form "<BASE HREF=...>" where
* the "..." URL is the directory of cx's origin URL. Such a base URL is the
* default base for relative URLs in generated HTML.
*/
extern char *
LM_GetBaseHrefTag(JSContext *cx, JSPrincipals *principals);
/*
* XXX Make these public LO_... typedefs in lo_ele.h/ntypes.h?
*/
struct lo_FormData_struct;
struct lo_NameList_struct;
extern struct lo_FormData_struct *
LO_GetFormDataByID(MWContext *context, int32 layer_id, intn form_id);
extern uint
LO_EnumerateForms(MWContext *context, int32 layer_id);
extern struct LO_ImageStruct_struct *
LO_GetImageByIndex(MWContext *context, int32 layer_id, intn image_id);
extern uint
LO_EnumerateImages(MWContext *context, int32 layer_id);
/*
* Reflect display layers into Mocha.
*/
extern JSObject *
LM_ReflectLayer(MWContext *context, int32 layer_id, int32 parent_layer_id,
PA_Tag *tag);
extern LO_FormElementStruct *
LO_GetFormElementByIndex(struct lo_FormData_struct *form_data, int32 index);
extern uint
LO_EnumerateFormElements(MWContext *context,
struct lo_FormData_struct *form_data);
/*
* Layout helper function to find a named anchor by its index in the
* document.anchors[] array.
*/
extern struct lo_NameList_struct *
LO_GetNamedAnchorByIndex(MWContext *context, int32 layer_id, uint index);
extern uint
LO_EnumerateNamedAnchors(MWContext *context, int32 layer_id);
#ifdef DOM
/*
* Layout helper function to find a span by its index in the
* document.spans[] array.
*/
extern struct lo_NameList_struct *
LO_GetSpanByIndex(MWContext *context, int32 layer_id, uint index);
extern uint
LO_EnumerateSpans(MWContext *context, int32 layer_id);
extern JSObject *
LO_GetMochaObjectOfParentSpan( LO_Element *ele);
#endif
/*
* Layout Mocha helper function to find an HREF Anchor by its index in the
* document.links[] array.
*/
extern LO_AnchorData *
LO_GetLinkByIndex(MWContext *context, int32 layer_id, uint index);
extern uint
LO_EnumerateLinks(MWContext *context, int32 layer_id);
extern LO_JavaAppStruct *
LO_GetAppletByIndex(MWContext *context, int32 layer_id, uint index);
extern uint
LO_EnumerateApplets(MWContext *context, int32 layer_id);
extern LO_EmbedStruct *
LO_GetEmbedByIndex(MWContext *context, int32 layer_id, uint index);
extern uint
LO_EnumerateEmbeds(MWContext *context, int32 layer_id);
/*
* Get and set a color attribute in the current document state.
*/
extern void
LO_GetDocumentColor(MWContext *context, int type, LO_Color *color);
extern void
LO_SetDocumentColor(MWContext *context, int type, LO_Color *color);
/*
* Layout function to reallocate the lo_FormElementOptionData array pointed at
* by lo_FormElementSelectData's options member to include space for the number
* of options given by selectData->option_cnt.
*/
extern XP_Bool
LO_ResizeSelectOptions(lo_FormElementSelectData *selectData);
/*
* Discard the current document and all its subsidiary objects.
*/
extern void
LM_ReleaseDocument(MWContext *context, JSBool resize_reload);
/*
* Search if a the event is being captured in the frame hierarchy.
*/
extern XP_Bool
LM_EventCaptureCheck(MWContext *context, uint32 current_event);
/*
* Scroll a window to the given point.
*/
extern void LM_SendOnScroll(MWContext *context, int32 x, int32 y);
/*
* Display a help topic.
*/
extern void LM_SendOnHelp(MWContext *context);
/*
* Send a load or abort event for an image to a callback.
*/
typedef enum LM_ImageEvent {
LM_IMGUNBLOCK = 0,
LM_IMGLOAD = 1,
LM_IMGABORT = 2,
LM_IMGERROR = 3,
LM_LASTEVENT = 3
} LM_ImageEvent;
extern void
LM_ProcessImageEvent(MWContext *context, LO_ImageStruct *image_data,
LM_ImageEvent event);
/* This should be called when a named anchor is located. */
extern JSBool
LM_SendOnLocate(MWContext *context, struct lo_NameList_struct *name_rec);
extern JSObject *
LM_ReflectApplet(MWContext *context, LO_JavaAppStruct *applet_data,
PA_Tag * tag, int32 layer_id, uint index);
extern JSObject *
LM_ReflectEmbed(MWContext *context, LO_EmbedStruct *lo_embed,
PA_Tag * tag, int32 layer_id, uint index);
struct lo_FormData_struct;
struct lo_NameList_struct;
extern JSObject *
LM_ReflectForm(MWContext *context, struct lo_FormData_struct *form_data,
PA_Tag * tag, int32 layer_id, uint index);
extern JSObject *
LM_ReflectFormElement(MWContext *context, int32 layer_id, int32 form_id,
int32 element_id, PA_Tag * tag);
extern JSObject *
LM_ReflectLink(MWContext *context, LO_AnchorData *anchor_data, PA_Tag * tag,
int32 layer_id, uint index);
extern JSObject *
LM_ReflectNamedAnchor(MWContext *context, struct lo_NameList_struct *name_rec,
PA_Tag * tag, int32 layer_id, uint index);
extern JSObject *
LM_ReflectImage(MWContext *context, LO_ImageStruct *image_data,
PA_Tag * tag, int32 layer_id, uint index);
#ifdef DOM
/* Function prototype to make JS know about <SPAN> elements */
extern JSObject *
LM_ReflectSpan(MWContext *context, struct lo_NameList_struct *name_rec,
PA_Tag *tag, int32 layer_id, uint index);
extern JSObject *
LM_ReflectTransclusion(MWContext *context, void *ele, int32 layer_id, uint index);
#endif
extern JSBool
LM_CanDoJS(MWContext *context);
extern JSBool
LM_IsActive(MWContext *context);
/*
* Security.
*/
extern JSPrincipals *
LM_NewJSPrincipals(URL_Struct *archive, char *name, const char *codebase);
extern char *
LM_ExtractFromPrincipalsArchive(JSPrincipals *principals, char *name,
uint *length);
extern JSBool
LM_SetUntransformedSource(JSPrincipals *principals, char *original,
char *transformed);
extern JSPrincipals * PR_CALLBACK
LM_GetJSPrincipalsFromJavaCaller(JSContext *cx, int callerDepth);
/*
* LM_RegisterPrincipals will verify and register a set of principals
* in the decoder, modifying decoder->principals in the process. It
* returns the modified decoder.
*
* The "name" parameter may be NULL if "principals" was created with a name.
*/
extern JSPrincipals *
LM_RegisterPrincipals(MochaDecoder *decoder, JSPrincipals *principals,
char *name, char *src);
/*
* JavaScript Debugger support
*/
#ifdef JSDEBUGGER
extern NET_StreamClass*
LM_StreamBuilder( int format_out,
void *data_obj,
URL_Struct *URL_s,
MWContext *mwcontext );
extern JSBool
LM_GetJSDebugActive(void);
extern void
LM_JamSourceIntoJSDebug( const char *filename,
const char *str,
int32 len,
MWContext *mwcontext );
#endif
extern JSContext*
LM_GetCrippledContext(void);
NSPR_END_EXTERN_C
#endif /* libmocha_h___ */
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