Aegisub/auto3/callables.c

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// Copyright (c) 2005, 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
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:jiifurusu@gmail.com
//
// DO NOT compile this file separately! It's included as part of auto3.c
static struct Auto3Interpreter* GetScriptObject(lua_State *L)
{
return (struct Auto3Interpreter *)lua_touserdata(L, lua_upvalueindex(1));
}
static int LuaInclude(lua_State *L)
{
filename_t filename;
const char *incname;
char *error;
struct Auto3Interpreter *script;
script = GetScriptObject(L);
if (!script->cb.resolve_include) {
lua_pushstring(L, "Attempt to use include, but not implemented by host application");
lua_error(L);
}
incname = luaL_checkstring(L, 1);
filename = script->cb.resolve_include(script->cb.rundata, incname);
if (filename) {
// Load include
if (Auto3LuaLoad(L, filename, incname, &error)) {
free(filename);
lua_pushfstring(L, "Failed to include file '%s', error: %s", incname, error);
lua_error(L);
}
// Run include (don't protect, we're already in a protected environment, we'd just propagate it anyway)
lua_call(L, 0, 0);
free(filename);
} else {
lua_pushfstring(L, "Failed to resolve include file '%s'", incname);
lua_error(L);
}
// Not really compatible, but I don't think anyone have ever exploited that includes can return stuff
return 0;
}
static int LuaTextExtents(lua_State *L)
{
struct Auto3Interpreter *script;
const char *text, *fontname;
int fontsize, bold, italic, spacing, encoding;
float scale_x, scale_y;
float out_width, out_height, out_descent, out_extlead;
script = GetScriptObject(L);
if (!script->cb.text_extents) return 0;
// get text
text = luaL_checkstring(L, 2);
// check we have style table
if (!lua_istable(L, 1)) {
lua_pushstring(L, "First argument to text_extents must be style table");
lua_error(L);
}
// get style def
lua_pushstring(L, "fontname"); lua_gettable(L, 1);
fontname = lua_tostring(L, -1);
lua_pushstring(L, "fontsize"); lua_gettable(L, 1);
fontsize = lua_tonumber(L, -1);
lua_pushstring(L, "bold"); lua_gettable(L, 1);
bold = lua_toboolean(L, -1);
lua_pushstring(L, "italic"); lua_gettable(L, 1);
italic = lua_toboolean(L, -1);
lua_pushstring(L, "scale_x"); lua_gettable(L, 1);
scale_x = lua_tonumber(L, -1);
lua_pushstring(L, "scale_y"); lua_gettable(L, 1);
scale_y = lua_tonumber(L, -1);
lua_pushstring(L, "spacing"); lua_gettable(L, 1);
spacing = lua_tonumber(L, -1);
lua_pushstring(L, "encoding"); lua_gettable(L, 1);
encoding = lua_tonumber(L, -1);
// get measurements
script->cb.text_extents(script->cb.rundata, text, fontname, fontsize, bold, italic,
spacing, scale_x, scale_y, encoding, &out_width, &out_height, &out_descent, &out_extlead);
// remove strings and stuff
lua_pop(L, 8);
// return result
lua_pushnumber(L, out_width);
lua_pushnumber(L, out_height);
lua_pushnumber(L, out_descent);
lua_pushnumber(L, out_extlead);
return 4;
}
static int LuaFrameFromMs(lua_State *L)
{
int frame;
struct Auto3Interpreter *script;
script = GetScriptObject(L);
if (!script->cb.frame_from_ms) return 0;
frame = script->cb.frame_from_ms(script->cb.rundata, luaL_checkint(L, 1));
lua_pushnumber(L, frame);
return 1;
}
static int LuaMsFromFrame(lua_State *L)
{
int ms;
struct Auto3Interpreter *script;
script = GetScriptObject(L);
if (!script->cb.ms_from_frame) return 0;
ms = script->cb.ms_from_frame(script->cb.rundata, luaL_checkint(L, 1));
lua_pushnumber(L, ms);
return 1;
}
static int LuaReportProgress(lua_State *L)
{
struct Auto3Interpreter *script;
script = GetScriptObject(L);
if (script->cb.set_progress) script->cb.set_progress(script->cb.logdata, (float)luaL_checknumber(L, 1));
return 0;
}
static int LuaOutputDebug(lua_State *L)
{
struct Auto3Interpreter *script;
script = GetScriptObject(L);
if (script->cb.log_message) script->cb.log_message(script->cb.logdata, luaL_checkstring(L, 1));
return 0;
}
static int LuaSetStatus(lua_State *L)
{
struct Auto3Interpreter *script;
script = GetScriptObject(L);
if (script->cb.set_status) script->cb.set_status(script->cb.logdata, luaL_checkstring(L, 1));
return 0;
}