Aegisub/src/auto4_lua.cpp

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// Copyright (c) 2006, 2007, Niels Martin Hansen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Aegisub Project http://www.aegisub.org/
/// @file auto4_lua.cpp
/// @brief Lua 5.1-based scripting engine
/// @ingroup scripting
///
#include "auto4_lua.h"
#include "ass_dialogue.h"
#include "ass_file.h"
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#include "ass_info.h"
#include "ass_style.h"
#include "async_video_provider.h"
#include "auto4_lua_factory.h"
#include "command/command.h"
#include "compat.h"
#include "include/aegisub/context.h"
#include "options.h"
#include "project.h"
#include "selection_controller.h"
#include "subs_controller.h"
#include "video_controller.h"
#include "utils.h"
#include <libaegisub/lua/modules.h>
#include <libaegisub/lua/script_reader.h>
#include <libaegisub/lua/utils.h>
#include <libaegisub/path.h>
#include <libaegisub/make_unique.h>
#include <algorithm>
#include <boost/algorithm/string/case_conv.hpp>
#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/format.hpp>
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#include <boost/scope_exit.hpp>
#include <cassert>
#include <mutex>
#include <wx/clipbrd.h>
#include <wx/log.h>
#include <wx/msgdlg.h>
using namespace agi::lua;
using namespace Automation4;
namespace {
wxString get_wxstring(lua_State *L, int idx)
{
return wxString::FromUTF8(lua_tostring(L, idx));
}
wxString check_wxstring(lua_State *L, int idx)
{
return to_wx(check_string(L, idx));
}
void set_context(lua_State *L, const agi::Context *c)
{
// Explicit cast is needed to discard the const
push_value(L, (void *)c);
lua_setfield(L, LUA_REGISTRYINDEX, "project_context");
}
const agi::Context *get_context(lua_State *L)
{
lua_getfield(L, LUA_REGISTRYINDEX, "project_context");
if (!lua_islightuserdata(L, -1)) {
lua_pop(L, 1);
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return nullptr;
}
const agi::Context * c = static_cast<const agi::Context *>(lua_touserdata(L, -1));
lua_pop(L, 1);
return c;
}
int get_file_name(lua_State *L)
{
const agi::Context *c = get_context(L);
if (c && !c->subsController->Filename().empty())
push_value(L, c->subsController->Filename().filename());
else
lua_pushnil(L);
return 1;
}
int get_translation(lua_State *L)
{
wxString str(check_wxstring(L, 1));
push_value(L, _(str).utf8_str());
return 1;
}
int clipboard_get(lua_State *L)
{
std::string data = GetClipboard();
if (data.empty())
lua_pushnil(L);
else
push_value(L, data);
return 1;
}
int clipboard_set(lua_State *L)
{
std::string str(check_string(L, 1));
bool succeeded = false;
#if wxUSE_OLE
// OLE needs to be initialized on each thread that wants to write to
// the clipboard, which wx does not handle automatically
wxClipboard cb;
#else
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wxClipboard &cb = *wxTheClipboard;
#endif
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if (cb.Open()) {
succeeded = cb.SetData(new wxTextDataObject(to_wx(str)));
cb.Close();
cb.Flush();
}
lua_pushboolean(L, succeeded);
return 1;
}
int clipboard_init(lua_State *L)
{
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lua_createtable(L, 0, 2);
set_field<clipboard_get>(L, "get");
set_field<clipboard_set>(L, "set");
return 1;
}
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int frame_from_ms(lua_State *L)
{
const agi::Context *c = get_context(L);
int ms = lua_tointeger(L, -1);
lua_pop(L, 1);
if (c && c->project->Timecodes().IsLoaded())
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push_value(L, c->videoController->FrameAtTime(ms, agi::vfr::START));
else
lua_pushnil(L);
return 1;
}
int ms_from_frame(lua_State *L)
{
const agi::Context *c = get_context(L);
int frame = lua_tointeger(L, -1);
lua_pop(L, 1);
if (c && c->project->Timecodes().IsLoaded())
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push_value(L, c->videoController->TimeAtFrame(frame, agi::vfr::START));
else
lua_pushnil(L);
return 1;
}
int video_size(lua_State *L)
{
const agi::Context *c = get_context(L);
if (c && c->project->VideoProvider()) {
auto provider = c->project->VideoProvider();
push_value(L, provider->GetWidth());
push_value(L, provider->GetHeight());
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push_value(L, c->videoController->GetAspectRatioValue());
push_value(L, (int)c->videoController->GetAspectRatioType());
return 4;
}
else {
lua_pushnil(L);
return 1;
}
}
int get_keyframes(lua_State *L)
{
const agi::Context *c = get_context(L);
if (c)
push_value(L, c->project->Keyframes());
else
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lua_pushnil(L);
return 1;
}
int decode_path(lua_State *L)
{
std::string path = check_string(L, 1);
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lua_pop(L, 1);
push_value(L, config::path->Decode(path));
return 1;
}
int cancel_script(lua_State *L)
{
lua_pushnil(L);
throw error_tag();
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}
int lua_text_textents(lua_State *L)
{
argcheck(L, !!lua_istable(L, 1), 1, "");
argcheck(L, !!lua_isstring(L, 2), 2, "");
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// have to check that it looks like a style table before actually converting
// if it's a dialogue table then an active AssFile object is required
{
lua_getfield(L, 1, "class");
std::string actual_class{lua_tostring(L, -1)};
boost::to_lower(actual_class);
if (actual_class != "style")
return error(L, "Not a style entry");
lua_pop(L, 1);
}
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lua_pushvalue(L, 1);
std::unique_ptr<AssEntry> et(Automation4::LuaAssFile::LuaToAssEntry(L));
auto st = dynamic_cast<AssStyle*>(et.get());
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lua_pop(L, 1);
if (!st)
return error(L, "Not a style entry");
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double width, height, descent, extlead;
if (!Automation4::CalculateTextExtents(st, check_string(L, 2), width, height, descent, extlead))
return error(L, "Some internal error occurred calculating text_extents");
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push_value(L, width);
push_value(L, height);
push_value(L, descent);
push_value(L, extlead);
return 4;
}
int project_properties(lua_State *L)
{
const agi::Context *c = get_context(L);
if (!c)
lua_pushnil(L);
else {
lua_createtable(L, 0, 14);
#define PUSH_FIELD(name) set_field(L, #name, c->ass->Properties.name)
PUSH_FIELD(automation_scripts);
PUSH_FIELD(export_filters);
PUSH_FIELD(export_encoding);
PUSH_FIELD(style_storage);
PUSH_FIELD(video_zoom);
PUSH_FIELD(ar_value);
PUSH_FIELD(scroll_position);
PUSH_FIELD(active_row);
PUSH_FIELD(ar_mode);
PUSH_FIELD(video_position);
#undef PUSH_FIELD
set_field(L, "audio_file", config::path->MakeAbsolute(c->ass->Properties.audio_file, "?script"));
set_field(L, "video_file", config::path->MakeAbsolute(c->ass->Properties.video_file, "?script"));
set_field(L, "timecodes_file", config::path->MakeAbsolute(c->ass->Properties.timecodes_file, "?script"));
set_field(L, "keyframes_file", config::path->MakeAbsolute(c->ass->Properties.keyframes_file, "?script"));
}
return 1;
}
class LuaFeature {
int myid = 0;
protected:
lua_State *L;
void RegisterFeature();
void UnregisterFeature();
void GetFeatureFunction(const char *function) const;
LuaFeature(lua_State *L) : L(L) { }
};
/// Run a lua function on a background thread
/// @param L Lua state
/// @param nargs Number of arguments the function takes
/// @param nresults Number of values the function returns
/// @param title Title to use for the progress dialog
/// @param parent Parent window for the progress dialog
/// @param can_open_config Can the function open its own dialogs?
/// @throws agi::UserCancelException if the function fails to run to completion (either due to cancelling or errors)
void LuaThreadedCall(lua_State *L, int nargs, int nresults, std::string const& title, wxWindow *parent, bool can_open_config);
class LuaCommand final : public cmd::Command, private LuaFeature {
std::string cmd_name;
wxString display;
wxString help;
int cmd_type;
public:
LuaCommand(lua_State *L);
~LuaCommand();
const char* name() const override { return cmd_name.c_str(); }
wxString StrMenu(const agi::Context *) const override { return display; }
wxString StrDisplay(const agi::Context *) const override { return display; }
wxString StrHelp() const override { return help; }
int Type() const override { return cmd_type; }
void operator()(agi::Context *c) override;
bool Validate(const agi::Context *c) override;
virtual bool IsActive(const agi::Context *c) override;
static int LuaRegister(lua_State *L);
};
class LuaExportFilter final : public ExportFilter, private LuaFeature {
bool has_config;
LuaDialog *config_dialog;
protected:
std::unique_ptr<ScriptDialog> GenerateConfigDialog(wxWindow *parent, agi::Context *c) override;
public:
LuaExportFilter(lua_State *L);
static int LuaRegister(lua_State *L);
void ProcessSubs(AssFile *subs, wxWindow *export_dialog) override;
};
class LuaScript final : public Script {
lua_State *L = nullptr;
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std::string name;
std::string description;
std::string author;
std::string version;
std::vector<cmd::Command*> macros;
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std::vector<std::unique_ptr<ExportFilter>> filters;
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/// load script and create internal structures etc.
void Create();
/// destroy internal structures, unreg features and delete environment
void Destroy();
static int LuaInclude(lua_State *L);
public:
LuaScript(agi::fs::path const& filename);
~LuaScript() { Destroy(); }
void RegisterCommand(LuaCommand *command);
void UnregisterCommand(LuaCommand *command);
void RegisterFilter(LuaExportFilter *filter);
static LuaScript* GetScriptObject(lua_State *L);
// Script implementation
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void Reload() override { Create(); }
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std::string GetName() const override { return name; }
std::string GetDescription() const override { return description; }
std::string GetAuthor() const override { return author; }
std::string GetVersion() const override { return version; }
bool GetLoadedState() const override { return L != nullptr; }
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std::vector<cmd::Command*> GetMacros() const override { return macros; }
std::vector<ExportFilter*> GetFilters() const override;
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};
LuaScript::LuaScript(agi::fs::path const& filename)
: Script(filename)
{
Create();
}
void LuaScript::Create()
{
Destroy();
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name = GetPrettyFilename().string();
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// create lua environment
L = lua_open();
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bool loaded = false;
BOOST_SCOPE_EXIT_ALL(&) { if (!loaded) Destroy(); };
LuaStackcheck stackcheck(L);
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// register standard libs
preload_modules(L);
stackcheck.check_stack(0);
// dofile and loadfile are replaced with include
lua_pushnil(L);
lua_setglobal(L, "dofile");
lua_pushnil(L);
lua_setglobal(L, "loadfile");
push_value(L, exception_wrapper<LuaInclude>);
lua_setglobal(L, "include");
// Replace the default lua module loader with our unicode compatible
// one and set the module search path
if (!Install(L, include_path)) {
description = get_string_or_default(L, 1);
lua_pop(L, 1);
return;
}
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stackcheck.check_stack(0);
// prepare stuff in the registry
// store the script's filename
push_value(L, GetFilename().stem());
lua_setfield(L, LUA_REGISTRYINDEX, "filename");
stackcheck.check_stack(0);
// reference to the script object
push_value(L, this);
lua_setfield(L, LUA_REGISTRYINDEX, "aegisub");
stackcheck.check_stack(0);
// make "aegisub" table
lua_pushstring(L, "aegisub");
lua_createtable(L, 0, 13);
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set_field<LuaCommand::LuaRegister>(L, "register_macro");
set_field<LuaExportFilter::LuaRegister>(L, "register_filter");
set_field<lua_text_textents>(L, "text_extents");
set_field<frame_from_ms>(L, "frame_from_ms");
set_field<ms_from_frame>(L, "ms_from_frame");
set_field<video_size>(L, "video_size");
set_field<get_keyframes>(L, "keyframes");
set_field<decode_path>(L, "decode_path");
set_field<cancel_script>(L, "cancel");
set_field(L, "lua_automation_version", 4);
set_field<clipboard_init>(L, "__init_clipboard");
set_field<get_file_name>(L, "file_name");
set_field<get_translation>(L, "gettext");
set_field<project_properties>(L, "project_properties");
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// store aegisub table to globals
lua_settable(L, LUA_GLOBALSINDEX);
stackcheck.check_stack(0);
// load user script
if (!LoadFile(L, GetFilename())) {
description = get_string_or_default(L, 1);
lua_pop(L, 1);
return;
}
stackcheck.check_stack(1);
// and execute it
// this is where features are registered
// don't thread this, as there's no point in it and it seems to break on wx 2.8.3, for some reason
if (lua_pcall(L, 0, 0, 0)) {
// error occurred, assumed to be on top of Lua stack
description = str(boost::format("Error initialising Lua script \"%s\":\n\n%s") % GetPrettyFilename().string() % get_string_or_default(L, -1));
lua_pop(L, 1);
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return;
}
stackcheck.check_stack(0);
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lua_getglobal(L, "version");
if (lua_isnumber(L, -1) && lua_tointeger(L, -1) == 3) {
lua_pop(L, 1); // just to avoid tripping the stackcheck in debug
description = "Attempted to load an Automation 3 script as an Automation 4 Lua script. Automation 3 is no longer supported.";
return;
}
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name = get_global_string(L, "script_name");
description = get_global_string(L, "script_description");
author = get_global_string(L, "script_author");
version = get_global_string(L, "script_version");
if (name.empty())
name = GetPrettyFilename().string();
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lua_pop(L, 1);
// if we got this far, the script should be ready
loaded = true;
}
void LuaScript::Destroy()
{
// Assume the script object is clean if there's no Lua state
if (!L) return;
// loops backwards because commands remove themselves from macros when
// they're unregistered
for (int i = macros.size() - 1; i >= 0; --i)
cmd::unreg(macros[i]->name());
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filters.clear();
lua_close(L);
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L = nullptr;
}
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std::vector<ExportFilter*> LuaScript::GetFilters() const
{
std::vector<ExportFilter *> ret;
ret.reserve(filters.size());
for (auto& filter : filters) ret.push_back(filter.get());
return ret;
}
void LuaScript::RegisterCommand(LuaCommand *command)
{
for (auto macro : macros) {
if (macro->name() == command->name()) {
error(L, "A macro named '%s' is already defined in script '%s'",
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command->StrDisplay(nullptr).utf8_str().data(), name.c_str());
}
}
macros.push_back(command);
}
void LuaScript::UnregisterCommand(LuaCommand *command)
{
macros.erase(remove(macros.begin(), macros.end(), command), macros.end());
}
void LuaScript::RegisterFilter(LuaExportFilter *filter)
{
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filters.emplace_back(filter);
}
LuaScript* LuaScript::GetScriptObject(lua_State *L)
{
lua_getfield(L, LUA_REGISTRYINDEX, "aegisub");
void *ptr = lua_touserdata(L, -1);
lua_pop(L, 1);
return (LuaScript*)ptr;
}
int LuaScript::LuaInclude(lua_State *L)
{
const LuaScript *s = GetScriptObject(L);
const std::string filename(check_string(L, 1));
agi::fs::path filepath;
// Relative or absolute path
if (!boost::all(filename, !boost::is_any_of("/\\")))
filepath = s->GetFilename().parent_path()/filename;
else { // Plain filename
for (auto const& dir : s->include_path) {
filepath = dir/filename;
if (agi::fs::FileExists(filepath))
break;
}
}
if (!agi::fs::FileExists(filepath))
return error(L, "Lua include not found: %s", filename.c_str());
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if (!LoadFile(L, filepath))
return error(L, "Error loading Lua include \"%s\":\n%s", filename.c_str(), check_string(L, 1).c_str());
int pretop = lua_gettop(L) - 1; // don't count the function value itself
lua_call(L, 0, LUA_MULTRET);
return lua_gettop(L) - pretop;
}
void LuaThreadedCall(lua_State *L, int nargs, int nresults, std::string const& title, wxWindow *parent, bool can_open_config)
{
bool failed = false;
BackgroundScriptRunner bsr(parent, title);
bsr.Run([&](ProgressSink *ps) {
LuaProgressSink lps(L, ps, can_open_config);
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// Insert our error handler under the function to call
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lua_pushcclosure(L, add_stack_trace, 0);
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lua_insert(L, -nargs - 2);
if (lua_pcall(L, nargs, nresults, -nargs - 2)) {
if (!lua_isnil(L, -1)) {
// if the call failed, log the error here
ps->Log("\n\nLua reported a runtime error:\n");
ps->Log(get_string_or_default(L, -1));
}
lua_pop(L, 2);
failed = true;
}
else
lua_remove(L, -nresults - 1);
lua_gc(L, LUA_GCCOLLECT, 0);
});
if (failed)
throw agi::UserCancelException("Script threw an error");
}
// LuaFeature
void LuaFeature::RegisterFeature()
{
myid = luaL_ref(L, LUA_REGISTRYINDEX);
}
void LuaFeature::UnregisterFeature()
{
luaL_unref(L, LUA_REGISTRYINDEX, myid);
}
void LuaFeature::GetFeatureFunction(const char *function) const
{
// get this feature's function pointers
lua_rawgeti(L, LUA_REGISTRYINDEX, myid);
// get pointer for validation function
push_value(L, function);
lua_rawget(L, -2);
// remove the function table
lua_remove(L, -2);
assert(lua_isfunction(L, -1));
}
// LuaFeatureMacro
int LuaCommand::LuaRegister(lua_State *L)
{
static std::mutex mutex;
auto command = agi::make_unique<LuaCommand>(L);
{
std::lock_guard<std::mutex> lock(mutex);
cmd::reg(std::move(command));
}
return 0;
}
LuaCommand::LuaCommand(lua_State *L)
: LuaFeature(L)
, display(check_wxstring(L, 1))
, help(get_wxstring(L, 2))
, cmd_type(cmd::COMMAND_NORMAL)
{
lua_getfield(L, LUA_REGISTRYINDEX, "filename");
cmd_name = str(boost::format("automation/lua/%s/%s") % check_string(L, -1) % check_string(L, 1));
if (!lua_isfunction(L, 3))
error(L, "The macro processing function must be a function");
if (lua_isfunction(L, 4))
cmd_type |= cmd::COMMAND_VALIDATE;
if (lua_isfunction(L, 5))
cmd_type |= cmd::COMMAND_TOGGLE;
// new table for containing the functions for this feature
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lua_createtable(L, 0, 3);
// store processing function
push_value(L, "run");
lua_pushvalue(L, 3);
lua_rawset(L, -3);
// store validation function
push_value(L, "validate");
lua_pushvalue(L, 4);
lua_rawset(L, -3);
// store active function
push_value(L, "isactive");
lua_pushvalue(L, 5);
lua_rawset(L, -3);
// store the table in the registry
RegisterFeature();
LuaScript::GetScriptObject(L)->RegisterCommand(this);
}
LuaCommand::~LuaCommand()
{
UnregisterFeature();
LuaScript::GetScriptObject(L)->UnregisterCommand(this);
}
static std::vector<int> selected_rows(const agi::Context *c)
{
auto const& sel = c->selectionController->GetSelectedSet();
int offset = c->ass->Info.size() + c->ass->Styles.size();
std::vector<int> rows;
rows.reserve(sel.size());
for (auto line : sel)
rows.push_back(line->Row + offset + 1);
sort(begin(rows), end(rows));
return rows;
}
bool LuaCommand::Validate(const agi::Context *c)
{
if (!(cmd_type & cmd::COMMAND_VALIDATE)) return true;
set_context(L, c);
GetFeatureFunction("validate");
auto subsobj = new LuaAssFile(L, c->ass.get());
push_value(L, selected_rows(c));
if (auto active_line = c->selectionController->GetActiveLine())
push_value(L, active_line->Row + c->ass->Info.size() + c->ass->Styles.size() + 1);
int err = lua_pcall(L, 3, 2, 0);
subsobj->ProcessingComplete();
if (err) {
wxLogWarning("Runtime error in Lua macro validation function:\n%s", get_wxstring(L, -1));
lua_pop(L, 1);
return false;
}
bool result = !!lua_toboolean(L, -2);
wxString new_help_string(get_wxstring(L, -1));
if (new_help_string.size()) {
help = new_help_string;
cmd_type |= cmd::COMMAND_DYNAMIC_HELP;
}
lua_pop(L, 2);
return result;
}
void LuaCommand::operator()(agi::Context *c)
{
LuaStackcheck stackcheck(L);
set_context(L, c);
stackcheck.check_stack(0);
GetFeatureFunction("run");
auto subsobj = new LuaAssFile(L, c->ass.get(), true, true);
int original_offset = c->ass->Info.size() + c->ass->Styles.size() + 1;
auto original_sel = selected_rows(c);
int original_active = 0;
if (auto active_line = c->selectionController->GetActiveLine())
original_active = active_line->Row + original_offset;
push_value(L, original_sel);
push_value(L, original_active);
try {
LuaThreadedCall(L, 3, 2, from_wx(StrDisplay(c)), c->parent, true);
auto lines = subsobj->ProcessingComplete(StrDisplay(c));
AssDialogue *active_line = nullptr;
int active_idx = original_active;
// Check for a new active row
if (lua_isnumber(L, -1)) {
active_idx = lua_tointeger(L, -1);
if (active_idx < 1 || active_idx > (int)lines.size()) {
wxLogError("Active row %d is out of bounds (must be 1-%u)", active_idx, lines.size());
active_idx = original_active;
}
}
stackcheck.check_stack(2);
lua_pop(L, 1);
// top of stack will be selected lines array, if any was returned
if (lua_istable(L, -1)) {
std::set<AssDialogue*> sel;
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lua_for_each(L, [&] {
if (lua_isnumber(L, -1)) {
int cur = lua_tointeger(L, -1);
if (cur < 1 || cur > (int)lines.size()) {
wxLogError("Selected row %d is out of bounds (must be 1-%u)", cur, lines.size());
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throw LuaForEachBreak();
}
auto diag = dynamic_cast<AssDialogue*>(lines[cur - 1]);
if (!diag) {
wxLogError("Selected row %d is not a dialogue line", cur);
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throw LuaForEachBreak();
}
sel.insert(diag);
if (!active_line || active_idx == cur)
active_line = diag;
}
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});
AssDialogue *new_active = c->selectionController->GetActiveLine();
if (active_line && (active_idx > 0 || !sel.count(new_active)))
new_active = active_line;
c->selectionController->SetSelectionAndActive(std::move(sel), new_active);
}
else {
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lua_pop(L, 1);
Selection new_sel;
AssDialogue *new_active = nullptr;
int prev = original_offset;
auto it = c->ass->Events.begin();
for (int row : original_sel) {
while (row > prev && it != c->ass->Events.end()) {
++prev;
++it;
}
if (row != prev) break;
new_sel.insert(&*it);
if (row == original_active)
new_active = &*it;
}
if (new_sel.empty() && !c->ass->Events.empty())
new_sel.insert(&c->ass->Events.front());
if (!new_sel.count(new_active))
new_active = *new_sel.begin();
c->selectionController->SetSelectionAndActive(std::move(new_sel), new_active);
}
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stackcheck.check_stack(0);
}
catch (agi::UserCancelException const&) {
subsobj->Cancel();
}
stackcheck.check_stack(0);
}
bool LuaCommand::IsActive(const agi::Context *c)
{
if (!(cmd_type & cmd::COMMAND_TOGGLE)) return false;
LuaStackcheck stackcheck(L);
set_context(L, c);
stackcheck.check_stack(0);
GetFeatureFunction("isactive");
auto subsobj = new LuaAssFile(L, c->ass.get());
push_value(L, selected_rows(c));
if (auto active_line = c->selectionController->GetActiveLine())
push_value(L, active_line->Row + c->ass->Info.size() + c->ass->Styles.size() + 1);
int err = lua_pcall(L, 3, 1, 0);
subsobj->ProcessingComplete();
bool result = false;
if (err)
wxLogWarning("Runtime error in Lua macro IsActive function:\n%s", get_wxstring(L, -1));
else
result = !!lua_toboolean(L, -1);
// clean up stack (result or error message)
stackcheck.check_stack(1);
lua_pop(L, 1);
return result;
}
// LuaFeatureFilter
LuaExportFilter::LuaExportFilter(lua_State *L)
: ExportFilter(check_string(L, 1), lua_tostring(L, 2), lua_tointeger(L, 3))
, LuaFeature(L)
{
if (!lua_isfunction(L, 4))
error(L, "The filter processing function must be a function");
// new table for containing the functions for this feature
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lua_createtable(L, 0, 2);
// store processing function
push_value(L, "run");
lua_pushvalue(L, 4);
lua_rawset(L, -3);
// store config function
push_value(L, "config");
lua_pushvalue(L, 5);
has_config = lua_isfunction(L, -1);
lua_rawset(L, -3);
// store the table in the registry
RegisterFeature();
LuaScript::GetScriptObject(L)->RegisterFilter(this);
}
int LuaExportFilter::LuaRegister(lua_State *L)
{
static std::mutex mutex;
auto filter = agi::make_unique<LuaExportFilter>(L);
{
std::lock_guard<std::mutex> lock(mutex);
AssExportFilterChain::Register(std::move(filter));
}
return 0;
}
void LuaExportFilter::ProcessSubs(AssFile *subs, wxWindow *export_dialog)
{
LuaStackcheck stackcheck(L);
GetFeatureFunction("run");
stackcheck.check_stack(1);
// The entire point of an export filter is to modify the file, but
// setting undo points makes no sense
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auto subsobj = new LuaAssFile(L, subs, true);
assert(lua_isuserdata(L, -1));
stackcheck.check_stack(2);
// config
if (has_config && config_dialog) {
int results_produced = config_dialog->LuaReadBack(L);
assert(results_produced == 1);
(void) results_produced; // avoid warning on release builds
// TODO, write back stored options here
} else {
// no config so put an empty table instead
lua_newtable(L);
}
assert(lua_istable(L, -1));
stackcheck.check_stack(3);
try {
LuaThreadedCall(L, 2, 0, GetName(), export_dialog, false);
stackcheck.check_stack(0);
subsobj->ProcessingComplete();
}
catch (agi::UserCancelException const&) {
subsobj->Cancel();
throw;
}
}
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std::unique_ptr<ScriptDialog> LuaExportFilter::GenerateConfigDialog(wxWindow *parent, agi::Context *c)
{
if (!has_config)
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return nullptr;
set_context(L, c);
GetFeatureFunction("config");
// prepare function call
auto subsobj = new LuaAssFile(L, c->ass.get());
// stored options
lua_newtable(L); // TODO, nothing for now
// do call
int err = lua_pcall(L, 2, 1, 0);
subsobj->ProcessingComplete();
if (err) {
wxLogWarning("Runtime error in Lua config dialog function:\n%s", get_wxstring(L, -1));
lua_pop(L, 1); // remove error message
} else {
// Create config dialogue from table on top of stack
config_dialog = new LuaDialog(L, false);
}
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return std::unique_ptr<ScriptDialog>{config_dialog};
}
}
namespace Automation4 {
LuaScriptFactory::LuaScriptFactory()
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: ScriptFactory("Lua", "*.lua,*.moon")
{
}
std::unique_ptr<Script> LuaScriptFactory::Produce(agi::fs::path const& filename) const
{
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if (agi::fs::HasExtension(filename, "lua") || agi::fs::HasExtension(filename, "moon"))
return agi::make_unique<LuaScript>(filename);
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return nullptr;
}
}