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493 lines (432 loc) · 13.9 KB
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Copy pathScript.c
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493 lines (432 loc) · 13.9 KB
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#include "Prototypes.h"
/*{
#include <lua.h>
struct ScriptState_ {
lua_State* L;
};
typedef struct Proxy_ {
void* ptr;
} Proxy;
}*/
#include <lualib.h>
#include <lauxlib.h>
#include "lua-compat-5.3/compat-5.3.h"
#ifdef __linux__
#include <execinfo.h>
#define STATIC
#else
#define STATIC static
#endif
STATIC void error(lua_State* L) {
int lines, cols;
Display_getScreenSize(&cols, &lines);
Display_errorScreen("%s", lua_tostring(L, -1));
lua_getglobal(L, "tabs");
TabManager* tabs = (TabManager*) ((Proxy*)lua_touserdata(L, -1))->ptr;
TabManager_refreshCurrent(tabs);
TabManager_draw(tabs, cols);
}
STATIC void Script_pushObject(lua_State* L, void* ptr, const char* klass, const luaL_Reg* functions) {
Proxy* proxy = lua_newuserdata(L, sizeof(Proxy));
proxy->ptr = ptr;
if (luaL_newmetatable(L, klass)) {
luaL_setfuncs(L, functions, 0);
lua_pushvalue(L, -1);
lua_setfield(L, -2, "__index");
}
lua_setmetatable(L, -2);
}
STATIC int Script_Buffer_goto(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
int x = luaL_checkinteger(L, 2);
int y = luaL_checkinteger(L, 3);
Buffer_validateCoordinate(buffer, &x, &y);
Buffer_goto(buffer, x-1, y-1);
buffer->savedX = buffer->x;
return 0;
}
STATIC int Script_Buffer_line(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
const char* line;
if (lua_gettop(L) == 1) {
line = Buffer_currentLine(buffer);
lua_pushstring(L, line);
lua_pushinteger(L, buffer->x + 1);
lua_pushinteger(L, buffer->y + 1);
return 3;
} else {
int y = luaL_checkinteger(L, 2);
line = Buffer_getLine(buffer, y-1);
if (line) lua_pushstring(L, line);
else lua_pushliteral(L, "");
return 1;
}
}
STATIC int Script_Buffer_select(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
int xFrom = luaL_checkinteger(L, 2) - 1;
int yFrom = luaL_checkinteger(L, 3) - 1;
int xTo = luaL_checkinteger(L, 4) - 1;
int yTo = luaL_checkinteger(L, 5) - 1;
Buffer_validateCoordinate(buffer, &xFrom, &yFrom);
Buffer_validateCoordinate(buffer, &xTo, &yTo);
buffer->selecting = true;
buffer->selectXfrom = xFrom;
buffer->selectYfrom = yFrom;
buffer->selectXto = xTo;
buffer->selectYto = yTo;
buffer->x = xTo;
buffer->y = yTo;
buffer->panel->needsRedraw = true;
buffer->savedX = buffer->x;
return 0;
}
STATIC int Script_Buffer_selection(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
if (!buffer->selecting) {
lua_pushliteral(L, "");
lua_pushinteger(L, buffer->x + 1);
lua_pushinteger(L, buffer->y + 1);
lua_pushinteger(L, buffer->x + 1);
lua_pushinteger(L, buffer->y + 1);
return 5;
}
int len = 0;
char* block = Buffer_copyBlock(buffer, &len);
lua_pushstring(L, block);
lua_pushinteger(L, buffer->selectXfrom + 1);
lua_pushinteger(L, buffer->selectYfrom + 1);
lua_pushinteger(L, buffer->selectXto + 1);
lua_pushinteger(L, buffer->selectYto + 1);
free(block);
return 5;
}
STATIC int Script_Buffer_token(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
const char* line = Buffer_currentLine(buffer);
int x = buffer->x;
if (!isword(line[x])) return 0;
while (x > 0 && isword(line[x-1])) x--;
int len = 0;
while (isword(line[x+len])) len++;
lua_pushlstring(L, line+x, len);
lua_pushinteger(L, x + 1);
lua_pushinteger(L, buffer->y + 1);
lua_pushinteger(L, len);
return 4;
}
STATIC int Script_Buffer_dir(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
char* name = buffer->fileName;
char* slash = strrchr(name, '/');
if (!slash)
return 0;
lua_pushlstring(L, name, slash - name);
return 1;
}
STATIC int Script_Buffer_filename(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
lua_pushstring(L, buffer->fileName);
return 1;
}
STATIC int Script_Buffer_basename(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
const char* baseName = strrchr(buffer->fileName, '/');
baseName = baseName ? baseName + 1 : buffer->fileName;
lua_pushstring(L, baseName);
return 1;
}
STATIC int Script_Buffer_xy(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
lua_pushinteger(L, buffer->x + 1);
lua_pushinteger(L, buffer->y + 1);
return 2;
}
STATIC int Script_Buffer_beginUndoGroup(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
Buffer_beginUndoGroup(buffer);
return 0;
}
STATIC int Script_Buffer_endUndoGroup(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
Buffer_endUndoGroup(buffer);
return 0;
}
STATIC int Script_Buffer___index(lua_State* L) {
if (lua_isnumber(L, 2)) {
return Script_Buffer_line(L);
} else {
lua_getfield(L, LUA_REGISTRYINDEX, "Buffer_functions");
lua_pushvalue(L, -2); // push key (function name)
lua_gettable(L, -2); // get it from Buffer_functions
lua_remove(L, -2); // remove Buffer_functions table from stack
return 1;
}
}
STATIC int Script_Buffer___newindex(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
if (lua_gettop(L) == 3) {
int y = luaL_checkinteger(L, 2) - 1;
luaL_checkstring(L, 3);
size_t len;
const char* text = lua_tolstring(L, 3, &len);
Buffer_setLine(buffer, y, Text_new((char*) text));
}
return 0;
}
STATIC int Script_Buffer___len(lua_State* L) {
Buffer* buffer = (Buffer*) ((Proxy*)luaL_checkudata(L, 1, "Buffer"))->ptr;
lua_pushinteger(L, Panel_size(buffer->panel));
return 1;
}
STATIC void Script_Buffer_new(lua_State* L, void* ptr) {
Proxy* proxy = lua_newuserdata(L, sizeof(Proxy));
proxy->ptr = ptr;
if (luaL_newmetatable(L, "Buffer")) {
lua_pushcfunction(L, Script_Buffer___index);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, Script_Buffer___newindex);
lua_setfield(L, -2, "__newindex");
lua_pushcfunction(L, Script_Buffer___len);
lua_setfield(L, -2, "__len");
}
lua_setmetatable(L, -2);
}
STATIC int Script_TabManager_open(lua_State* L) {
TabManager* tabs = (TabManager*) ((Proxy*)luaL_checkudata(L, 1, "TabManager"))->ptr;
const char* name = luaL_checkstring(L, 2);
int page = Dit_open(tabs, name);
lua_pushinteger(L, page);
return 1;
}
STATIC int Script_TabManager_setPage(lua_State* L) {
TabManager* tabs = (TabManager*) ((Proxy*)luaL_checkudata(L, 1, "TabManager"))->ptr;
int page = luaL_checkinteger(L, 2);
TabManager_setPage(tabs, page);
return 0;
}
STATIC int Script_TabManager_markJump(lua_State* L) {
TabManager* tabs = (TabManager*) ((Proxy*)luaL_checkudata(L, 1, "TabManager"))->ptr;
TabManager_markJump(tabs);
return 0;
}
STATIC int Script_TabManager_getBuffer(lua_State* L) {
TabManager* tabs = (TabManager*) ((Proxy*)luaL_checkudata(L, 1, "TabManager"))->ptr;
int page = luaL_checkinteger(L, 2);
Buffer* buffer = TabManager_getBuffer(tabs, page);
if (!buffer)
return 0;
Script_Buffer_new(L, buffer);
return 1;
}
STATIC luaL_Reg TabManager_functions[] = {
{ "open", Script_TabManager_open },
{ "setPage", Script_TabManager_setPage },
{ "getBuffer", Script_TabManager_getBuffer },
{ "markJump", Script_TabManager_markJump },
{ NULL, NULL }
};
STATIC int Script_string___index(lua_State* L) {
if (lua_isnumber(L, 2)) {
int at = lua_tointeger(L, 2);
size_t len;
char out[2];
const char* str = lua_tolstring(L,
8000
1, &len);
if (at < 0) {
at += len + 1;
}
if (at > len || at < 1) {
lua_pop(L, 2);
lua_pushliteral(L, "");
return 1;
} else {
out[0] = str[at-1];
out[1] = '\0';
lua_pop(L, 2);
lua_pushlstring(L, out, 1);
}
return 1;
} else {
lua_getglobal(L, "string");
lua_pushvalue(L, -2); // push key (function name)
lua_gettable(L, -2); // get it from string functions
lua_remove(L, -2); // remove string functions table from stack
return 1;
}
}
STATIC luaL_Reg Buffer_functions[] = {
// getters:
{ "line", Script_Buffer_line },
{ "selection", Script_Buffer_selection },
{ "token", Script_Buffer_token },
{ "xy", Script_Buffer_xy },
{ "dir", Script_Buffer_dir },
{ "basename", Script_Buffer_basename },
{ "filename", Script_Buffer_filename },
// actions:
{ "go_to", Script_Buffer_goto },
{ "select", Script_Buffer_select },
{ "begin_undo", Script_Buffer_beginUndoGroup },
{ "end_undo", Script_Buffer_endUndoGroup },
{ NULL, NULL }
};
void Script_initState(ScriptState* state, TabManager* tabs, Buffer* buffer) {
lua_State* L = luaL_newstate();
state->L = L;
luaL_openlibs(L);
lua_pushstring(L, "buffer"); // push a random string
lua_getmetatable(L, -1); // get metatable of strings
lua_remove(L, -2); // remove random string
lua_pushcfunction(L, Script_string___index); // push custom index fn
lua_setfield(L, -2, "__index"); // set it in metatable
lua_pop(L, 1); // pop metatable
lua_pushstring(L, "Buffer_functions");
luaL_newlib(L, Buffer_functions);
lua_settable(L, LUA_REGISTRYINDEX);
Script_pushObject(L, tabs, "TabManager", TabManager_functions);
lua_setglobal(L, "tabs");
Script_Buffer_new(L, buffer);
lua_setglobal(L, "buffer");
}
void Script_doneState(ScriptState* state) {
lua_close(state->L);
}
bool Script_load(ScriptState* this, const char* scriptName) {
lua_State* L = this->L;
int dirEndsAt;
char* foundFile = Files_findFile("scripts/%s", scriptName, &dirEndsAt);
if (!foundFile) {
return false;
}
char* foundDir = strdup(foundFile);
foundDir[dirEndsAt] = '\0';
lua_getglobal(L, "package");
lua_getfield(L, -1, "path");
size_t len;
const char* oldPackagePath = lua_tolstring(L, -1, &len);
len += strlen(foundDir) + 18; // ";scripts/?.lua\0"
char newPackagePath[len];
snprintf(newPackagePath, len-1, "%s;%sscripts/?.lua", oldPackagePath, foundDir);
lua_pop(L, 1);
lua_pushstring(L, newPackagePath);
lua_setfield(L, -2, "path");
free(foundDir);
int err = luaL_dofile(L, foundFile);
free(foundFile);
if (err != 0) {
Display_errorScreen("Error loading script %s", lua_tostring(L, -1));
return false;
}
return true;
}
STATIC int errorHandler(lua_State* L) {
#ifdef __linux__
int nptrs;
void* buffer[100];
char** strings;
nptrs = backtrace(buffer, sizeof(buffer)/sizeof(void*));
strings = backtrace_symbols(buffer, nptrs);
#endif
lua_pushliteral(L, "\n");
lua_getglobal(L, "debug");
lua_getfield(L, -1, "traceback");
lua_call(L, 0, 1);
lua_remove(L, -2);
#ifdef __linux__
lua_pushliteral(L, "\nC traceback:");
lua_checkstack(L, lua_gettop(L) + nptrs);
for (int i = 0; i < nptrs; i++) {
lua_pushfstring(L, "\n\t%s", strings[i]);
}
lua_concat(L, 4 + nptrs);
#else
lua_concat(L, 3);
#endif
return 1;
}
inline bool callFunction(lua_State* L, const char* fn, const char* arg) {
lua_pushcfunction(L, errorHandler);
int errFunc = lua_gettop(L);
lua_getglobal(L, fn);
if (!lua_isfunction(L, -1))
return false;
if (arg)
lua_pushstring(L, arg);
int err = lua_pcall(L, arg ? 1 : 0, 0, errFunc);
if (err) error(L);
lua_pop(L, lua_gettop(L));
return (err == 0);
}
void Script_highlightFile(Highlight* this, const char* fileName) {
if (!this->hasScript)
return;
lua_State* L = this->script->L;
this->hasScript = callFunction(L, "highlight_file", fileName);
}
void Script_highlightLine(Highlight* this, const char* buffer, int* attrs, int len, int y) {
lua_State* L = this->script->L;
if (!this->hasScript)
return;
lua_pushcfunction(L, errorHandler);
int errFunc = lua_gettop(L);
lua_getglobal(L, "highlight_line");
if (!lua_isfunction(L, -1)) {
this->hasScript = false;
return;
}
lua_pushstring(L, buffer);
lua_pushinteger(L, y);
int err = lua_pcall(L, 2, 1, errFunc);
if (err == 0) {
if (lua_gettop(L) > 0 && lua_isstring(L, -1)) {
const char* ret = lua_tostring(L, -1);
for (int i = 0; ret[i] && i < len; i++) {
if (ret[i] != ' ') {
int attr = CRT_colors[Highlight_translateColorKey(ret[i])];
attrs[i] = attr;
}
}
}
} else {
if (err) error(L);
}
lua_pop(L, lua_gettop(L));
}
void Script_onKey(Buffer* this, int key) {
lua_State* L = this->script.L;
if (this->skipOnKey) return;
lua_pushcfunction(L, errorHandler);
int errFunc = lua_gettop(L);
lua_getglobal(L, "on_key");
if (!lua_isfunction(L, -1)) {
this->skipOnKey = true;
return;
}
lua_pushinteger(L, key);
int err = lua_pcall(L, 1, 0, errFunc);
if (err) error(L);
lua_pop(L, lua_gettop(L));
}
void Script_onCtrl(Buffer* this, int key) {
if (this->skipOnCtrl) return;
lua_State* L = this->script.L;
char ch[2] = { 'A' + key - 1, '\0' };
this->skipOnCtrl = !callFunction(L, "on_ctrl", ch);
}
void Script_onFKey(Buffer* this, int key) {
if (this->skipOnFKey) return;
lua_State* L = this->script.L;
char ch[10];
snprintf(ch, 10, "F%d", key - KEY_F(1) + 1);
this->skipOnFKey = !callFunction(L, "on_fkey", ch);
}
void Script_onSave(Buffer* this, const char* fileName) {
if (this->skipOnSave) return;
lua_State* L = this->script.L;
this->skipOnSave = !callFunction(L, "on_save", fileName);
}
void Script_onChange(Buffer* this) {
if (this->skipOnChange) return;
lua_State* L = this->script.L;
this->skipOnChange = !callFunction(L, "on_change", NULL);
}