diff options
Diffstat (limited to 'source/pdf/js/pdf-jsimp-jscore.c')
| -rw-r--r-- | source/pdf/js/pdf-jsimp-jscore.c | 518 |
1 files changed, 0 insertions, 518 deletions
diff --git a/source/pdf/js/pdf-jsimp-jscore.c b/source/pdf/js/pdf-jsimp-jscore.c deleted file mode 100644 index 364b08b5..00000000 --- a/source/pdf/js/pdf-jsimp-jscore.c +++ /dev/null @@ -1,518 +0,0 @@ -/* This file contains wrapper functions for pdf_jsimp functions implemented - * in Javascriptcore */ - -#include <JavaScriptCore/JavaScriptCore.h> -#include "mupdf/pdf.h" - -#define STRING_BUF_SIZE (256) -#define FUNCTION_PREAMBLE_LEN (9) - -/* - We need only a single JSClassRef because we store property and method information - in the private data of each object. The JSClassRef is set up to know how to access - that data. -*/ -struct pdf_jsimp_s -{ - fz_context *ctx; - void *nat_ctx; - JSGlobalContextRef jscore_ctx; - JSClassRef class_ref; -}; - -enum -{ - PROP_FN, - PROP_VAL -}; - -typedef struct prop_fn_s -{ - pdf_jsimp_method *meth; -} prop_fn; - -typedef struct prop_val_s -{ - pdf_jsimp_getter *get; - pdf_jsimp_setter *set; -} prop_val; - -typedef struct prop_s -{ - char *name; - int type; - union - { - prop_fn fn; - prop_val val; - } u; -} prop; - -typedef struct prop_list_s prop_list; - -struct prop_list_s -{ - prop prop; - prop_list *next; -}; - -struct pdf_jsimp_type_s -{ - pdf_jsimp *imp; - pdf_jsimp_dtr *dtr; - prop_list *props; -}; - -/* - When we create a JavaScriptCore object, we store in its private data the MuPDF - native object pointer and a pointer to the type. The type has a list of the - properties and methods -*/ -typedef struct priv_data_s -{ - pdf_jsimp_type *type; - void *natobj; -} priv_data; - -struct pdf_jsimp_obj_s -{ - JSValueRef ref; - char *str; -}; - -static prop *find_prop(prop_list *list, char *name) -{ - while (list) - { - if (strcmp(name, list->prop.name) == 0) - return &list->prop; - - list = list->next; - } - - return NULL; -} - -static pdf_jsimp_obj *wrap_val(pdf_jsimp *imp, JSValueRef ref) -{ - pdf_jsimp_obj *obj = fz_malloc_struct(imp->ctx, pdf_jsimp_obj); - obj->ref = ref; - JSValueProtect(imp->jscore_ctx, ref); - - return obj; -} - -static JSValueRef callMethod(JSContextRef jscore_ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef *exception) -{ - pdf_jsimp *imp; - fz_context *ctx; - pdf_jsimp_obj *res = NULL; - JSValueRef resref = NULL; - int i; - pdf_jsimp_obj **args = NULL; - pdf_jsimp_method *meth = JSObjectGetPrivate(function); - priv_data *pdata = JSObjectGetPrivate(thisObject); - if (meth == NULL) - { - /* - The attempt to store the method pointer as private data failed, so we - turn the function into a string, which will have the form "function name() xxx", - and then lookup the name. - */ - char name[STRING_BUF_SIZE]; - char *np; - char *bp; - JSStringRef jname = JSValueToStringCopy(jscore_ctx, function, NULL); - prop *p; - JSStringGetUTF8CString(jname, name, STRING_BUF_SIZE); - if (strlen(name) >= FUNCTION_PREAMBLE_LEN) - { - np = name + FUNCTION_PREAMBLE_LEN; /* strlen("function "); */ - bp = strchr(np, '('); - if (bp) - *bp = 0; - p = find_prop(pdata->type->props, np); - if (p && p->type == PROP_FN) - { - meth = p->u.fn.meth; - } - } - JSStringRelease(jname); - } - if (meth == NULL || pdata == NULL) - return JSValueMakeUndefined(jscore_ctx); - - imp = pdata->type->imp; - ctx = imp->ctx; - - fz_var(args); - fz_var(res); - fz_try(ctx) - { - args = fz_malloc_array(ctx, argumentCount, sizeof(pdf_jsimp_obj)); - for (i = 0; i < argumentCount; i++) - args[i] = wrap_val(imp, arguments[i]); - - res = meth(imp->nat_ctx, pdata->natobj, argumentCount, args); - if (res) - resref = res->ref; - } - fz_always(ctx) - { - if (args) - { - for (i = 0; i < argumentCount; i++) - pdf_jsimp_drop_obj(imp, args[i]); - fz_free(ctx, args); - } - pdf_jsimp_drop_obj(imp, res); - } - fz_catch(ctx) - { - return JSValueMakeUndefined(jscore_ctx); - } - - return resref; -} - -static JSValueRef getProperty(JSContextRef jscore_ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef *exception) -{ - pdf_jsimp *imp; - char buf[STRING_BUF_SIZE]; - prop *p; - JSValueRef res = NULL; - - priv_data *pdata = JSObjectGetPrivate(object); - if (pdata == NULL) - return NULL; - - JSStringGetUTF8CString(propertyName, buf, STRING_BUF_SIZE); - p = find_prop(pdata->type->props, buf); - if (p == NULL) - return NULL; - - imp = pdata->type->imp; - - switch(p->type) - { - case PROP_FN: - { - /* - For some reason passing the method pointer as private data doesn't work: the data comes back - NULL when interrogated in callMethod above. So we also specify the method name when - creating the function so that we can look it up again in callMethod. Not ideal, but - will do until we can find a better solution. - */ - JSObjectRef ores = JSObjectMakeFunctionWithCallback(jscore_ctx, propertyName, callMethod); - JSObjectSetPrivate(ores, p->u.fn.meth); - res = ores; - } - break; - - case PROP_VAL: - { - pdf_jsimp_obj *pres = p->u.val.get(imp->nat_ctx, pdata->natobj); - res = pres->ref; - pdf_jsimp_drop_obj(imp, pres); - } - break; - } - - return res; -} - -static bool setProperty(JSContextRef jscore_ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef value, JSValueRef *exception) -{ - pdf_jsimp *imp; - char buf[STRING_BUF_SIZE]; - prop *p; - - priv_data *pdata = JSObjectGetPrivate(object); - if (pdata == NULL) - return false; - - JSStringGetUTF8CString(propertyName, buf, STRING_BUF_SIZE); - p = find_prop(pdata->type->props, buf); - if (p == NULL) - return false; - - imp = pdata->type->imp; - - switch(p->type) - { - case PROP_FN: - break; - - case PROP_VAL: - { - pdf_jsimp_obj *pval = wrap_val(imp, value); - p->u.val.set(imp->nat_ctx, pdata->natobj, pval); - pdf_jsimp_drop_obj(imp, pval); - } - break; - } - - return true; -} - -pdf_jsimp *pdf_new_jsimp(fz_context *ctx, void *jsctx) -{ - pdf_jsimp *imp = fz_malloc_struct(ctx, pdf_jsimp); - - fz_try(ctx) - { - JSClassDefinition classDef = kJSClassDefinitionEmpty; - - classDef.getProperty = getProperty; - classDef.setProperty = setProperty; - - imp->nat_ctx = jsctx; - imp->class_ref = JSClassCreate(&classDef); - imp->jscore_ctx = JSGlobalContextCreate(imp->class_ref); - if (imp->jscore_ctx == NULL) - fz_throw(ctx, FZ_ERROR_GENERIC, "JSGlobalContextCreate failed"); - } - fz_catch(ctx) - { - pdf_drop_jsimp(imp); - fz_rethrow(ctx); - } - - imp->ctx = ctx; - - return imp; -} - -void pdf_drop_jsimp(pdf_jsimp *imp) -{ - if (imp) - { - JSGlobalContextRelease(imp->jscore_ctx); - JSClassRelease(imp->class_ref); - fz_free(imp->ctx, imp); - } -} - -pdf_jsimp_type *pdf_jsimp_new_type(pdf_jsimp *imp, pdf_jsimp_dtr *dtr, char *name) -{ - pdf_jsimp_type *type = fz_malloc_struct(imp->ctx, pdf_jsimp_type); - type->imp = imp; - type->dtr = dtr; - return type; -} - -void pdf_jsimp_drop_type(pdf_jsimp *imp, pdf_jsimp_type *type) -{ - if (imp && type) - { - fz_context *ctx = imp->ctx; - prop_list *node; - - while (type->props) - { - node = type->props; - type->props = node->next; - fz_free(ctx, node->prop.name); - fz_free(ctx, node); - } - - fz_free(ctx, type); - } -} - -void pdf_jsimp_addmethod(pdf_jsimp *imp, pdf_jsimp_type *type, char *name, pdf_jsimp_method *meth) -{ - fz_context *ctx = imp->ctx; - prop_list *node = fz_malloc_struct(ctx, prop_list); - - fz_try(ctx) - { - node->prop.name = fz_strdup(imp->ctx, name); - node->prop.type = PROP_FN; - node->prop.u.fn.meth = meth; - - node->next = type->props; - type->props = node; - } - fz_catch(ctx) - { - fz_free(ctx, node); - fz_rethrow(ctx); - } -} - -void pdf_jsimp_addproperty(pdf_jsimp *imp, pdf_jsimp_type *type, char *name, pdf_jsimp_getter *get, pdf_jsimp_setter *set) -{ - fz_context *ctx = imp->ctx; - prop_list *node = fz_malloc_struct(ctx, prop_list); - - fz_try(ctx) - { - node->prop.name = fz_strdup(imp->ctx, name); - node->prop.type = PROP_VAL; - node->prop.u.val.get = get; - node->prop.u.val.set = set; - - node->next = type->props; - type->props = node; - } - fz_catch(ctx) - { - fz_free(ctx, node); - fz_rethrow(ctx); - } -} - -void pdf_jsimp_set_global_type(pdf_jsimp *imp, pdf_jsimp_type *type) -{ - fz_context *ctx = imp->ctx; - priv_data *pdata; - JSObjectRef gobj = JSContextGetGlobalObject(imp->jscore_ctx); - if (gobj == NULL) - fz_throw(ctx, FZ_ERROR_GENERIC, "JSContextGetGlobalObject failed"); - - pdata = fz_malloc_struct(ctx, priv_data); - pdata->type = type; - pdata->natobj = NULL; - JSObjectSetPrivate(gobj, pdata); -} - -pdf_jsimp_obj *pdf_jsimp_new_obj(pdf_jsimp *imp, pdf_jsimp_type *type, void *natobj) -{ - fz_context *ctx = imp->ctx; - pdf_jsimp_obj *obj = fz_malloc_struct(ctx, pdf_jsimp_obj); - priv_data *pdata = NULL; - - fz_var(pdata); - fz_try(ctx) - { - pdata = fz_malloc_struct(ctx, priv_data); - pdata->type = type; - pdata->natobj = natobj; - obj->ref = JSObjectMake(imp->jscore_ctx, imp->class_ref, pdata); - if (obj->ref == NULL) - fz_throw(ctx, FZ_ERROR_GENERIC, "JSObjectMake failed"); - - JSValueProtect(imp->jscore_ctx, obj->ref); - } - fz_catch(ctx) - { - fz_free(ctx, pdata); - fz_free(ctx, obj); - fz_rethrow(ctx); - } - - return obj; -} - -void pdf_jsimp_drop_obj(pdf_jsimp *imp, pdf_jsimp_obj *obj) -{ - if (imp && obj) - { - JSValueUnprotect(imp->jscore_ctx, obj->ref); - fz_free(imp->ctx, obj->str); - fz_free(imp->ctx, obj); - } -} - -int pdf_jsimp_to_type(pdf_jsimp *imp, pdf_jsimp_obj *obj) -{ - switch (JSValueGetType(imp->jscore_ctx, obj->ref)) - { - case kJSTypeNull: return JS_TYPE_NULL; - case kJSTypeBoolean: return JS_TYPE_BOOLEAN; - case kJSTypeNumber: return JS_TYPE_NUMBER; - case kJSTypeString: return JS_TYPE_STRING; - case kJSTypeObject: return JS_TYPE_ARRAY; - default: return JS_TYPE_UNKNOWN; - } -} - -pdf_jsimp_obj *pdf_jsimp_from_string(pdf_jsimp *imp, char *str) -{ - JSStringRef sref = JSStringCreateWithUTF8CString(str); - JSValueRef vref = JSValueMakeString(imp->jscore_ctx, sref); - JSStringRelease(sref); - - return wrap_val(imp, vref); -} - -char *pdf_jsimp_to_string(pdf_jsimp *imp, pdf_jsimp_obj *obj) -{ - fz_context *ctx = imp->ctx; - JSStringRef jstr = JSValueToStringCopy(imp->jscore_ctx, obj->ref, NULL); - int len; - - if (jstr == NULL) - return ""; - - fz_try(ctx) - { - len = JSStringGetMaximumUTF8CStringSize(jstr); - fz_free(ctx, obj->str); - obj->str = NULL; - obj->str = fz_malloc(ctx, len+1); - JSStringGetUTF8CString(jstr, obj->str, len+1); - } - fz_always(ctx) - { - JSStringRelease(jstr); - } - fz_catch(ctx) - { - fz_rethrow(ctx); - } - - return obj->str; -} - -pdf_jsimp_obj *pdf_jsimp_from_number(pdf_jsimp *imp, double num) -{ - return wrap_val(imp, JSValueMakeNumber(imp->jscore_ctx, num)); -} - -double pdf_jsimp_to_number(pdf_jsimp *imp, pdf_jsimp_obj *obj) -{ - return JSValueToNumber(imp->jscore_ctx, obj->ref, NULL); -} - -int pdf_jsimp_array_len(pdf_jsimp *imp, pdf_jsimp_obj *obj) -{ - pdf_jsimp_obj *lobj = pdf_jsimp_property(imp, obj, "length"); - int num = (int)pdf_jsimp_to_number(imp, lobj); - - pdf_jsimp_drop_obj(imp, lobj); - - return num; -} - -pdf_jsimp_obj *pdf_jsimp_array_item(pdf_jsimp *imp, pdf_jsimp_obj *obj, int i) -{ - return wrap_val(imp, JSObjectGetPropertyAtIndex(imp->jscore_ctx, JSValueToObject(imp->jscore_ctx, obj->ref, NULL), i, NULL)); -} - -pdf_jsimp_obj *pdf_jsimp_property(pdf_jsimp *imp, pdf_jsimp_obj *obj, char *prop) -{ - JSStringRef jprop = JSStringCreateWithUTF8CString(prop); - JSValueRef jval = JSObjectGetProperty(imp->jscore_ctx, JSValueToObject(imp->jscore_ctx, obj->ref, NULL), jprop, NULL); - - JSStringRelease(jprop); - - return wrap_val(imp, jval); -} - -void pdf_jsimp_execute(pdf_jsimp *imp, char *code) -{ - JSStringRef jcode = JSStringCreateWithUTF8CString(code); - JSEvaluateScript(imp->jscore_ctx, jcode, NULL, NULL, 0, NULL); - JSStringRelease(jcode); -} - -void pdf_jsimp_execute_count(pdf_jsimp *imp, char *code, int count) -{ - char *terminated = fz_malloc(imp->ctx, count+1); - memcpy(terminated, code, count); - terminated[count] = 0; - pdf_jsimp_execute(imp, terminated); - fz_free(imp->ctx, terminated); -} |