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Return nil from lua functions which require a project context if they're called during script initialization. Closes #1380.

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Originally committed to SVN as r6255.
This commit is contained in:
Thomas Goyne 2012-01-09 20:31:19 +00:00
parent bf26c14999
commit 8bfefd356c
1 changed files with 12 additions and 4 deletions
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16
aegisub/src/auto4_lua.cpp
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@ -125,7 +125,10 @@ namespace {
const agi::Context *get_context(lua_State *L)
{
lua_getfield(L, LUA_REGISTRYINDEX, "project_context");
assert(lua_islightuserdata(L, -1));
if (!lua_islightuserdata(L, -1)) {
lua_pop(L, 1);
return 0;
}
const agi::Context * c = static_cast<const agi::Context *>(lua_touserdata(L, -1));
lua_pop(L, 1);
return c;
@ -458,7 +461,7 @@ namespace Automation4 {
const agi::Context *c = get_context(L);
int ms = lua_tointeger(L, -1);
lua_pop(L, 1);
if (c->videoController->TimecodesLoaded())
if (c && c->videoController->TimecodesLoaded())
lua_pushnumber(L, c->videoController->FrameAtTime(ms, agi::vfr::START));
else
lua_pushnil(L);
@ -471,7 +474,7 @@ namespace Automation4 {
const agi::Context *c = get_context(L);
int frame = lua_tointeger(L, -1);
lua_pop(L, 1);
if (c->videoController->TimecodesLoaded())
if (c && c->videoController->TimecodesLoaded())
lua_pushnumber(L, c->videoController->TimeAtFrame(frame, agi::vfr::START));
else
lua_pushnil(L);
@ -481,7 +484,7 @@ namespace Automation4 {
int LuaScript::LuaVideoSize(lua_State *L)
{
const agi::Context *c = get_context(L);
if (c->videoController->IsLoaded()) {
if (c && c->videoController->IsLoaded()) {
lua_pushnumber(L, c->videoController->GetWidth());
lua_pushnumber(L, c->videoController->GetHeight());
lua_pushnumber(L, c->videoController->GetAspectRatioValue());
@ -497,6 +500,11 @@ namespace Automation4 {
int LuaScript::LuaGetKeyframes(lua_State *L)
{
const agi::Context *c = get_context(L);
if (!c) {
lua_pushnil(L);
return 1;
}
std::vector<int> const& kf = c->videoController->GetKeyFrames();
lua_newtable(L);