android 阅读器

/* * Copyright (C) 2007-2013 Geometer Plus <contact@geometerplus.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA. */ package org.geometerplus.zlibrary.text.view; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.HashMap; import java.util.Iterator; import java.util.LinkedList; import java.util.Set; import java.util.TreeSet; import org.geometerplus.zlibrary.core.application.ZLApplication; import org.geometerplus.zlibrary.core.filesystem.ZLFile; import org.geometerplus.zlibrary.core.util.ZLColor; import org.geometerplus.zlibrary.core.view.ZLPaintContext; import org.geometerplus.zlibrary.text.hyphenation.ZLTextHyphenationInfo; import org.geometerplus.zlibrary.text.hyphenation.ZLTextHyphenator; import org.geometerplus.zlibrary.text.model.ZLTextAlignmentType; import org.geometerplus.zlibrary.text.model.ZLTextMark; import org.geometerplus.zlibrary.text.model.ZLTextModel; import org.geometerplus.zlibrary.text.model.ZLTextParagraph; import org.geometerplus.zlibrary.text.view.style.ZLTextStyleCollection; public abstract class ZLTextView extends ZLTextViewBase { public static final int MAX_SELECTION_DISTANCE = 10; public interface ScrollingMode { int NO_OVERLAPPING = 0; int KEEP_LINES = 1; int SCROLL_LINES = 2; int SCROLL_PERCENTAGE = 3; }; private ZLTextModel myModel; private interface SizeUnit { int PIXEL_UNIT = 0; int LINE_UNIT = 1; }; private int myScrollingMode; private int myOverlappingValue; private ZLTextPage myPreviousPage = new ZLTextPage(); private ZLTextPage myCurrentPage = new ZLTextPage(); private ZLTextPage myNextPage = new ZLTextPage(); private final HashMap<ZLTextLineInfo,ZLTextLineInfo> myLineInfoCache = new HashMap<ZLTextLineInfo,ZLTextLineInfo>(); private ZLTextRegion.Soul mySelectedRegionSoul; private boolean myHighlightSelectedRegion = true; private final ZLTextSelection mySelection = new ZLTextSelection(this); private final Set<ZLTextHighlighting> myHighlightings = Collections.synchronizedSet(new TreeSet<ZLTextHighlighting>()); public ZLTextView(ZLApplication application) { super(application); } public synchronized void setModel(ZLTextModel model) { ZLTextParagraphCursorCache.clear(); mySelection.clear(); myHighlightings.clear(); myModel = model; myCurrentPage.reset(); myPreviousPage.reset(); myNextPage.reset(); if (myModel != null) { final int paragraphsNumber = myModel.getParagraphsNumber(); if (paragraphsNumber > 0) { myCurrentPage.moveStartCursor(ZLTextParagraphCursor.cursor(myModel, 0)); } } Application.getViewWidget().reset(); } public ZLTextModel getModel() { return myModel; } public ZLTextWordCursor getStartCursor() { if (myCurrentPage.StartCursor.isNull()) { preparePaintInfo(myCurrentPage); } return myCurrentPage.StartCursor; } public ZLTextWordCursor getEndCursor() { if (myCurrentPage.EndCursor.isNull()) { preparePaintInfo(myCurrentPage); } return myCurrentPage.EndCursor; } private synchronized void gotoMark(ZLTextMark mark) { if (mark == null) { return; } myPreviousPage.reset(); myNextPage.reset(); boolean doRepaint = false; if (myCurrentPage.StartCursor.isNull()) { doRepaint = true; preparePaintInfo(myCurrentPage); } if (myCurrentPage.StartCursor.isNull()) { return; } if (myCurrentPage.StartCursor.getParagraphIndex() != mark.ParagraphIndex || myCurrentPage.StartCursor.getMark().compareTo(mark) > 0) { doRepaint = true; gotoPosition(mark.ParagraphIndex, 0, 0); preparePaintInfo(myCurrentPage); } if (myCurrentPage.EndCursor.isNull()) { preparePaintInfo(myCurrentPage); } while (mark.compareTo(myCurrentPage.EndCursor.getMark()) > 0) { doRepaint = true; scrollPage(true, ScrollingMode.NO_OVERLAPPING, 0); preparePaintInfo(myCurrentPage); } if (doRepaint) { if (myCurrentPage.StartCursor.isNull()) { preparePaintInfo(myCurrentPage); } Application.getViewWidget().reset(); Application.getViewWidget().repaint(); } } public synchronized void gotoHighlighting(ZLTextHighlighting highlighting) { myPreviousPage.reset(); myNextPage.reset(); boolean doRepaint = false; if (myCurrentPage.StartCursor.isNull()) { doRepaint = true; preparePaintInfo(myCurrentPage); } if (myCurrentPage.StartCursor.isNull()) { return; } if (!highlighting.intersects(myCurrentPage)) { gotoPosition(highlighting.getStartPosition().getParagraphIndex(), 0, 0); preparePaintInfo(myCurrentPage); } if (myCurrentPage.EndCursor.isNull()) { preparePaintInfo(myCurrentPage); } while (!highlighting.intersects(myCurrentPage)) { doRepaint = true; scrollPage(true, ScrollingMode.NO_OVERLAPPING, 0); preparePaintInfo(myCurrentPage); } if (doRepaint) { if (myCurrentPage.StartCursor.isNull()) { preparePaintInfo(myCurrentPage); } Application.getViewWidget().reset(); Application.getViewWidget().repaint(); } } public synchronized int search(final String text, boolean ignoreCase, boolean wholeText, boolean backward, boolean thisSectionOnly) { if (text.length() == 0) { return 0; } int startIndex = 0; int endIndex = myModel.getParagraphsNumber(); if (thisSectionOnly) { // TODO: implement } int count = myModel.search(text, startIndex, endIndex, ignoreCase); myPreviousPage.reset(); myNextPage.reset(); if (!myCurrentPage.StartCursor.isNull()) { rebuildPaintInfo(); if (count > 0) { ZLTextMark mark = myCurrentPage.StartCursor.getMark(); gotoMark(wholeText ? (backward ? myModel.getLastMark() : myModel.getFirstMark()) : (backward ? myModel.getPreviousMark(mark) : myModel.getNextMark(mark))); } Application.getViewWidget().reset(); Application.getViewWidget().repaint(); } return count; } public boolean canFindNext() { final ZLTextWordCursor end = myCurrentPage.EndCursor; return !end.isNull() && (myModel != null) && (myModel.getNextMark(end.getMark()) != null); } public synchronized void findNext() { final ZLTextWordCursor end = myCurrentPage.EndCursor; if (!end.isNull()) { gotoMark(myModel.getNextMark(end.getMark())); } } public boolean canFindPrevious() { final ZLTextWordCursor start = myCurrentPage.StartCursor; return !start.isNull() && (myModel != null) && (myModel.getPreviousMark(start.getMark()) != null); } public synchronized void findPrevious() { final ZLTextWordCursor start = myCurrentPage.StartCursor; if (!start.isNull()) { gotoMark(myModel.getPreviousMark(start.getMark())); } } public void clearFindResults() { if (!findResultsAreEmpty()) { myModel.removeAllMarks(); rebuildPaintInfo(); Application.getViewWidget().reset(); Application.getViewWidget().repaint(); } } public boolean findResultsAreEmpty() { return (myModel == null) || myModel.getMarks().isEmpty(); } @Override public synchronized void onScrollingFinished(PageIndex pageIndex) { switch (pageIndex) { case current: break; case previous: { final ZLTextPage swap = myNextPage; myNextPage = myCurrentPage; myCurrentPage = myPreviousPage; myPreviousPage = swap; myPreviousPage.reset(); if (myCurrentPage.PaintState == PaintStateEnum.NOTHING_TO_PAINT) { preparePaintInfo(myNextPage);