mirror of
https://github.com/koreader/koreader
synced 2024-11-16 06:12:56 +00:00
676 lines
17 KiB
C++
676 lines
17 KiB
C++
/*
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KindlePDFViewer: CREngine abstraction for Lua
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Copyright (C) 2012 Hans-Werner Hilse <hilse@web.de>
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Qingping Hou <qingping.hou@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define DEBUG_CRENGINE 0
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extern "C" {
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#include "blitbuffer.h"
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#include "drawcontext.h"
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#include "cre.h"
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}
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#include "crengine.h"
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typedef struct CreDocument {
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LVDocView *text_view;
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ldomDocument *dom_doc;
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} CreDocument;
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static int initCache(lua_State *L) {
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int cache_size = luaL_optint(L, 1, (2 << 20) * 64); // 64Mb on disk cache for DOM
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ldomDocCache::init(lString16("./cr3cache"), cache_size);
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return 0;
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}
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static int openDocument(lua_State *L) {
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const char *file_name = luaL_checkstring(L, 1);
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const char *style_sheet = luaL_checkstring(L, 2);
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int width = luaL_checkint(L, 3);
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int height = luaL_checkint(L, 4);
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lString8 css;
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CreDocument *doc = (CreDocument*) lua_newuserdata(L, sizeof(CreDocument));
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luaL_getmetatable(L, "credocument");
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lua_setmetatable(L, -2);
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doc->text_view = new LVDocView();
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//doc->text_view->setBackgroundColor(0xFFFFFF);
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//doc->text_view->setTextColor(0x000000);
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if (LVLoadStylesheetFile(lString16(style_sheet), css)){
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if (!css.empty()){
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doc->text_view->setStyleSheet(css);
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}
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}
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doc->text_view->setViewMode(DVM_SCROLL, -1);
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doc->text_view->Resize(width, height);
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doc->text_view->LoadDocument(file_name);
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doc->dom_doc = doc->text_view->getDocument();
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doc->text_view->Render();
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return 1;
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}
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static int getGammaIndex(lua_State *L) {
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lua_pushinteger(L, fontMan->GetGammaIndex());
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return 1;
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}
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static int setGammaIndex(lua_State *L) {
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int index = luaL_checkint(L, 1);
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fontMan->SetGammaIndex(index);
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return 0;
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}
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static int closeDocument(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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// should be save if called twice
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if(doc->text_view != NULL) {
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delete doc->text_view;
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doc->text_view = NULL;
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}
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return 0;
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}
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static int getNumberOfPages(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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lua_pushinteger(L, doc->text_view->getPageCount());
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return 1;
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}
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static int getCurrentPage(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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lua_pushinteger(L, doc->text_view->getCurPage()+1);
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return 1;
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}
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static int getPageFromXPointer(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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const char *xpointer_str = luaL_checkstring(L, 2);
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int page = 1;
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ldomXPointer xp = doc->dom_doc->createXPointer(lString16(xpointer_str));
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page = doc->text_view->getBookmarkPage(xp) + 1;
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lua_pushinteger(L, page);
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return 1;
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}
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static int getPosFromXPointer(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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const char *xpointer_str = luaL_checkstring(L, 2);
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int pos = 0;
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ldomXPointer xp = doc->dom_doc->createXPointer(lString16(xpointer_str));
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lvPoint pt = xp.toPoint();
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if (pt.y > 0) {
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pos = pt.y;
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}
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lua_pushinteger(L, pos);
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return 1;
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}
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static int getCurrentPos(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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lua_pushinteger(L, doc->text_view->GetPos());
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return 1;
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}
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static int getCurrentPercent(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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lua_pushinteger(L, doc->text_view->getPosPercent());
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return 1;
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}
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static int getXPointer(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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ldomXPointer xp = doc->text_view->getBookmark();
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lua_pushstring(L, UnicodeToLocal(xp.toString()).c_str());
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return 1;
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}
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static int getFullHeight(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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lua_pushinteger(L, doc->text_view->GetFullHeight());
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return 1;
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}
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static int getFontSize(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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lua_pushinteger(L, doc->text_view->getFontSize());
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return 1;
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}
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static int getFontFace(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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lua_pushstring(L, doc->text_view->getDefaultFontFace().c_str());
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return 1;
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}
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/*
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* helper function for getTableOfContent()
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*/
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static int walkTableOfContent(lua_State *L, LVTocItem *toc, int *count) {
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LVTocItem *toc_tmp = NULL;
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int i = 0,
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nr_child = toc->getChildCount();
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for(i = 0; i < nr_child; i++) {
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toc_tmp = toc->getChild(i);
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lua_pushnumber(L, (*count)++);
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/* set subtable, Toc entry */
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lua_newtable(L);
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lua_pushstring(L, "page");
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lua_pushnumber(L, toc_tmp->getPage()+1);
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lua_settable(L, -3);
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lua_pushstring(L, "xpointer");
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lua_pushstring(L, UnicodeToLocal(
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toc_tmp->getXPointer().toString()).c_str()
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);
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lua_settable(L, -3);
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lua_pushstring(L, "depth");
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lua_pushnumber(L, toc_tmp->getLevel());
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lua_settable(L, -3);
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lua_pushstring(L, "title");
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lua_pushstring(L, UnicodeToLocal(toc_tmp->getName()).c_str());
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lua_settable(L, -3);
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/* set Toc entry to Toc table */
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lua_settable(L, -3);
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if (toc_tmp->getChildCount() > 0) {
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walkTableOfContent(L, toc_tmp, count);
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}
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}
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return 0;
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}
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/*
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* Return a table like this:
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* {
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* {
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* page=12,
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* xpointer = "/body/DocFragment[11].0",
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* depth=1,
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* title="chapter1"
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* },
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* {
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* page=54,
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* xpointer = "/body/DocFragment[13].0",
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* depth=1,
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* title="chapter2"
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* },
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* }
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*
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*/
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static int getTableOfContent(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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LVTocItem * toc = doc->text_view->getToc();
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int count = 0;
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lua_newtable(L);
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walkTableOfContent(L, toc, &count);
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return 1;
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}
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/*
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* Return a table like this:
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* {
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* "FreeMono",
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* "FreeSans",
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* "FreeSerif",
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* }
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*
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*/
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static int getFontFaces(lua_State *L) {
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int i = 0;
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lString16Collection face_list;
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fontMan->getFaceList(face_list);
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lua_newtable(L);
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for (i = 0; i < face_list.length(); i++)
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{
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lua_pushnumber(L, i+1);
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lua_pushstring(L, UnicodeToLocal(face_list[i]).c_str());
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lua_settable(L, -3);
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}
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return 1;
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}
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static int setFontFace(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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const char *face = luaL_checkstring(L, 2);
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doc->text_view->setDefaultFontFace(lString8(face));
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//fontMan->SetFallbackFontFace(lString8(face));
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return 0;
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}
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static int gotoPage(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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int pageno = luaL_checkint(L, 2);
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doc->text_view->goToPage(pageno-1);
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return 0;
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}
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static int gotoPercent(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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int percent = luaL_checkint(L, 2);
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doc->text_view->SetPos(percent * doc->text_view->GetFullHeight() / 10000);
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return 0;
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}
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static int gotoPos(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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int pos = luaL_checkint(L, 2);
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doc->text_view->SetPos(pos);
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return 0;
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}
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static int gotoXPointer(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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const char *xpointer_str = luaL_checkstring(L, 2);
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ldomXPointer xp = doc->dom_doc->createXPointer(lString16(xpointer_str));
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doc->text_view->goToBookmark(xp);
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/* CREngine does not call checkPos() immediately after goToBookmark,
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* so I have to manually update the pos in order to get a correct
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* return from GetPos() call. */
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doc->text_view->SetPos(xp.toPoint().y);
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return 0;
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}
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/* zoom font by given delta and return zoomed font size */
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static int zoomFont(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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int delta = luaL_checkint(L, 2);
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doc->text_view->ZoomFont(delta);
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lua_pushnumber(L, doc->text_view->getFontSize());
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return 1;
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}
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static int setFontSize(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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int size = luaL_checkint(L, 2);
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doc->text_view->setFontSize(size);
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return 0;
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}
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static int setDefaultInterlineSpace(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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int space = luaL_checkint(L, 2);
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doc->text_view->setDefaultInterlineSpace(space);
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return 0;
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}
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static int setStyleSheet(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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const char* style_sheet_data = luaL_checkstring(L, 2);
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doc->text_view->setStyleSheet(lString8(style_sheet_data));
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return 0;
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}
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static int toggleFontBolder(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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doc->text_view->doCommand(DCMD_TOGGLE_BOLD);
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return 0;
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}
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static int cursorRight(lua_State *L) {
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//CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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//LVDocView *tv = doc->text_view;
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//ldomXPointer p = tv->getCurrentPageMiddleParagraph();
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//lString16 s = p.getText();
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//lString16 s = p.toString();
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//printf("~~~~~~~~~~%s\n", UnicodeToLocal(s).c_str());
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//tv->selectRange(*(tv->selectFirstPageLink()));
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//ldomXRange *r = tv->selectNextPageLink(true);
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//lString16 s = r->getRangeText();
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//printf("------%s\n", UnicodeToLocal(s).c_str());
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//tv->selectRange(*r);
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//tv->updateSelections();
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//LVPageWordSelector sel(doc->text_view);
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//doc->text_view->doCommand(DCMD_SELECT_FIRST_SENTENCE);
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//sel.moveBy(DIR_RIGHT, 2);
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//printf("---------------- %s\n", UnicodeToLocal(sel.getSelectedWord()->getText()).c_str());
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return 0;
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}
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static int getPageLinks(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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lua_newtable(L); // all links
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int pos = doc->text_view->GetPos();
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printf("## pos=%d\n", pos);
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ldomXRangeList links;
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ldomXRangeList & sel = doc->text_view->getDocument()->getSelections();
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doc->text_view->getCurrentPageLinks( links );
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int linkCount = links.length();
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if ( linkCount ) {
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sel.clear();
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for ( int i=0; i<linkCount; i++ ) {
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lString16 txt = links[i]->getRangeText();
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lString8 txt8 = UnicodeToLocal( txt );
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lString16 link = links[i]->getHRef();
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lString8 link8 = UnicodeToLocal( link );
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ldomXRange currSel;
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currSel = *links[i];
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lvPoint start_pt ( currSel.getStart().toPoint() );
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lvPoint end_pt ( currSel.getEnd().toPoint() );
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printf("# link %d start %d %d end %d %d '%s' %s\n", i,
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start_pt.x, start_pt.y, end_pt.x, end_pt.y,
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txt8.c_str(), link8.c_str()
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);
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lua_newtable(L); // new link
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lua_pushstring(L, "start_x");
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lua_pushinteger(L, start_pt.x);
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lua_settable(L, -3);
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lua_pushstring(L, "start_y");
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lua_pushinteger(L, start_pt.y);
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lua_settable(L, -3);
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lua_pushstring(L, "end_x");
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lua_pushinteger(L, end_pt.x);
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lua_settable(L, -3);
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lua_pushstring(L, "end_y");
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lua_pushinteger(L, end_pt.y);
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lua_settable(L, -3);
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const char * link_to = link8.c_str();
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if ( link_to[0] == '#' ) {
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lua_pushstring(L, "section");
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lua_pushstring(L, link_to);
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lua_settable(L, -3);
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sel.add( new ldomXRange(*links[i]) ); // highlight
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} else {
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lua_pushstring(L, "uri");
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lua_pushstring(L, link_to);
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lua_settable(L, -3);
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}
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lua_rawseti(L, -2, i + 1);
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}
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doc->text_view->updateSelections();
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}
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return 1;
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}
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static int gotoLink(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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const char *pos = luaL_checkstring(L, 2);
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doc->text_view->goLink(lString16(pos), true);
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return 0;
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}
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static int clearSelection(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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doc->text_view->clearSelection();
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return 0;
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}
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static int drawCurrentPage(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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BlitBuffer *bb = (BlitBuffer*) luaL_checkudata(L, 2, "blitbuffer");
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int w = bb->w,
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h = bb->h;
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/* Set DrawBuf to 4bpp */
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LVGrayDrawBuf drawBuf(w, h, 4);
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doc->text_view->Resize(w, h);
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doc->text_view->Render();
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doc->text_view->Draw(drawBuf);
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uint8_t *bbptr = (uint8_t*)bb->data;
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uint8_t *pmptr = (uint8_t*)drawBuf.GetScanLine(0);
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int i,x;
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for (i = 0; i < h; i++) {
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for (x = 0; x < (bb->w / 2); x++) {
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/* When DrawBuf is set to 4bpp mode, CREngine still put every
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* four bits in one byte, but left the last 4 bits zero*/
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bbptr[x] = ~(pmptr[x*2] | (pmptr[x*2+1] >> 4));
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}
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if(bb->w & 1) {
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bbptr[x] = 255 - (pmptr[x*2] & 0xF0);
|
|
}
|
|
bbptr += bb->pitch;
|
|
pmptr += w;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int registerFont(lua_State *L) {
|
|
const char *fontfile = luaL_checkstring(L, 1);
|
|
if ( !fontMan->RegisterFont(lString8(fontfile)) ) {
|
|
return luaL_error(L, "cannot register font <%s>", fontfile);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// ported from Android UI kpvcrlib/crengine/android/jni/docview.cpp
|
|
|
|
static int findText(lua_State *L) {
|
|
CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
|
|
const char *l_pattern = luaL_checkstring(L, 2);
|
|
lString16 pattern = lString16(l_pattern);
|
|
int origin = luaL_checkint(L, 3);
|
|
bool reverse = luaL_checkint(L, 4);
|
|
bool caseInsensitive = luaL_checkint(L, 5);
|
|
|
|
if ( pattern.empty() )
|
|
return 0;
|
|
|
|
LVArray<ldomWord> words;
|
|
lvRect rc;
|
|
doc->text_view->GetPos( rc );
|
|
int pageHeight = rc.height();
|
|
int start = -1;
|
|
int end = -1;
|
|
if ( reverse ) {
|
|
// reverse
|
|
if ( origin == 0 ) {
|
|
// from end current page to first page
|
|
end = rc.bottom;
|
|
} else if ( origin == -1 ) {
|
|
// from last page to end of current page
|
|
start = rc.bottom;
|
|
} else { // origin == 1
|
|
// from prev page to first page
|
|
end = rc.top;
|
|
}
|
|
} else {
|
|
// forward
|
|
if ( origin == 0 ) {
|
|
// from current page to last page
|
|
start = rc.top;
|
|
} else if ( origin == -1 ) {
|
|
// from first page to current page
|
|
end = rc.top;
|
|
} else { // origin == 1
|
|
// from next page to last
|
|
start = rc.bottom;
|
|
}
|
|
}
|
|
CRLog::debug("CRViewDialog::findText: Current page: %d .. %d", rc.top, rc.bottom);
|
|
CRLog::debug("CRViewDialog::findText: searching for text '%s' from %d to %d origin %d", LCSTR(pattern), start, end, origin );
|
|
if ( doc->text_view->getDocument()->findText( pattern, caseInsensitive, reverse, start, end, words, 200, pageHeight ) ) {
|
|
CRLog::debug("CRViewDialog::findText: pattern found");
|
|
doc->text_view->clearSelection();
|
|
doc->text_view->selectWords( words );
|
|
ldomMarkedRangeList * ranges = doc->text_view->getMarkedRanges();
|
|
if ( ranges ) {
|
|
if ( ranges->length()>0 ) {
|
|
int pos = ranges->get(0)->start.y;
|
|
//doc->text_view->SetPos(pos); // commented out not to mask lua code which does the same
|
|
CRLog::debug("# SetPos = %d", pos);
|
|
lua_pushinteger(L, ranges->length()); // results found
|
|
lua_pushinteger(L, pos);
|
|
return 2;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
CRLog::debug("CRViewDialog::findText: pattern not found");
|
|
return 0;
|
|
}
|
|
|
|
static const struct luaL_Reg cre_func[] = {
|
|
{"initCache", initCache},
|
|
{"openDocument", openDocument},
|
|
{"getFontFaces", getFontFaces},
|
|
{"getGammaIndex", getGammaIndex},
|
|
{"setGammaIndex", setGammaIndex},
|
|
{"registerFont", registerFont},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static const struct luaL_Reg credocument_meth[] = {
|
|
/*--- get methods ---*/
|
|
{"getPages", getNumberOfPages},
|
|
{"getCurrentPage", getCurrentPage},
|
|
{"getPageFromXPointer", getPageFromXPointer},
|
|
{"getPosFromXPointer", getPosFromXPointer},
|
|
{"getCurrentPos", getCurrentPos},
|
|
{"getCurrentPercent", getCurrentPercent},
|
|
{"getCurrentXPointer", getCurrentXPointer},
|
|
{"getFullHeight", getFullHeight},
|
|
{"getFontSize", getFontSize},
|
|
{"getFontFace", getFontFace},
|
|
{"getToc", getTableOfContent},
|
|
/*--- set methods ---*/
|
|
{"setFontFace", setFontFace},
|
|
{"setFontSize", setFontSize},
|
|
{"setDefaultInterlineSpace", setDefaultInterlineSpace},
|
|
{"setStyleSheet", setStyleSheet},
|
|
/* --- control methods ---*/
|
|
{"gotoPage", gotoPage},
|
|
{"gotoPercent", gotoPercent},
|
|
{"gotoPos", gotoPos},
|
|
{"gotoXPointer", gotoXPointer},
|
|
{"zoomFont", zoomFont},
|
|
{"toggleFontBolder", toggleFontBolder},
|
|
//{"cursorLeft", cursorLeft},
|
|
//{"cursorRight", cursorRight},
|
|
{"drawCurrentPage", drawCurrentPage},
|
|
{"findText", findText},
|
|
{"getPageLinks", getPageLinks},
|
|
{"gotoLink", gotoLink},
|
|
{"clearSelection", clearSelection},
|
|
{"close", closeDocument},
|
|
{"__gc", closeDocument},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
int luaopen_cre(lua_State *L) {
|
|
luaL_newmetatable(L, "credocument");
|
|
lua_pushstring(L, "__index");
|
|
lua_pushvalue(L, -2);
|
|
lua_settable(L, -3);
|
|
luaL_register(L, NULL, credocument_meth);
|
|
lua_pop(L, 1);
|
|
luaL_register(L, "cre", cre_func);
|
|
|
|
|
|
/* initialize font manager for CREngine */
|
|
InitFontManager(lString8());
|
|
|
|
#if DEBUG_CRENGINE
|
|
CRLog::setStdoutLogger();
|
|
CRLog::setLogLevel(CRLog::LL_DEBUG);
|
|
#endif
|
|
|
|
return 1;
|
|
}
|