mirror of
https://github.com/koreader/koreader
synced 2024-11-11 19:11:14 +00:00
e4841e88c4
this patch also introduces an interface for setFontSize and setStyleSheet. Hopefully, we can use the latter to send customized CSS to CREngine as Lua strings. This functionality is however untested for now.
487 lines
12 KiB
C++
487 lines
12 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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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 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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delete doc->text_view;
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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());
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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 = 0;
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ldomXPointer xp = doc->dom_doc->createXPointer(lString16(xpointer_str));
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page = doc->text_view->getBookmarkPage(xp);
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lua_pushinteger(L, page);
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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 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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//lvRect rc;
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//int pos;
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//ldomXPointer *xp = NULL;
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//xp = doc->dom_doc->createXPointer(lString16(xpointer_str));
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//getCursorDocRect(*xp, rc);
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//pos =
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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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/*
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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->getPercent());
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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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* Warnning: not like pdf or djvu support, page here refers to the
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* percent of height within the document, not the real page number.
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* We use page here just to keep consistent with other readers.
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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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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);
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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.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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//sel.updateSelection();
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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 drawCurrentPage(lua_State *L) {
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CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
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DrawContext *dc = (DrawContext*) luaL_checkudata(L, 2, "drawcontext");
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BlitBuffer *bb = (BlitBuffer*) luaL_checkudata(L, 3, "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);
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}
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bbptr += bb->pitch;
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pmptr += w;
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}
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return 0;
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}
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static int registerFont(lua_State *L) {
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const char *fontfile = luaL_checkstring(L, 1);
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if ( !fontMan->RegisterFont(lString8(fontfile)) ) {
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return luaL_error(L, "cannot register font <%s>", fontfile);
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}
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return 0;
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}
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static const struct luaL_Reg cre_func[] = {
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{"openDocument", openDocument},
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{"getFontFaces", getFontFaces},
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{"getGammaIndex", getGammaIndex},
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{"setGammaIndex", setGammaIndex},
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{"registerFont", registerFont},
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{NULL, NULL}
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};
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static const struct luaL_Reg credocument_meth[] = {
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/*--- get methods ---*/
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{"getPages", getNumberOfPages},
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{"getCurrentPage", getCurrentPage},
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{"getPageFromXPointer", getPageFromXPointer},
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{"getCurrentPos", getCurrentPos},
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{"getCurrentPercent", getCurrentPercent},
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{"getXPointer", getXPointer},
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{"getFullHeight", getFullHeight},
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{"getToc", getTableOfContent},
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/*--- set methods ---*/
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{"setFontFace", setFontFace},
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{"setFontSize", setFontSize},
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{"setDefaultInterlineSpace", setDefaultInterlineSpace},
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{"setStyleSheet", setStyleSheet},
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/* --- control methods ---*/
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{"gotoPage", gotoPage},
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{"gotoPercent", gotoPercent},
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{"gotoPos", gotoPos},
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{"gotoXPointer", gotoXPointer},
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{"zoomFont", zoomFont},
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{"toggleFontBolder", toggleFontBolder},
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//{"cursorLeft", cursorLeft},
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//{"cursorRight", cursorRight},
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{"drawCurrentPage", drawCurrentPage},
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{"close", closeDocument},
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{"__gc", closeDocument},
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{NULL, NULL}
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};
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int luaopen_cre(lua_State *L) {
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luaL_newmetatable(L, "credocument");
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lua_pushstring(L, "__index");
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lua_pushvalue(L, -2);
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lua_settable(L, -3);
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luaL_register(L, NULL, credocument_meth);
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lua_pop(L, 1);
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luaL_register(L, "cre", cre_func);
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/* initialize font manager for CREngine */
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InitFontManager(lString8());
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#ifdef DEBUG_CRENGINE
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CRLog::setStdoutLogger();
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CRLog::setLogLevel(CRLog::LL_DEBUG);
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#endif
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return 1;
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}
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