From 383b7b9b7f7ba2516bb973c09883a93a8cf6a35e Mon Sep 17 00:00:00 2001 From: Vincent Hennebert Date: Thu, 12 Jul 2007 16:28:22 +0000 Subject: Extract the ActiveCell class into a top-level class git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@555686 13f79535-47bb-0310-9956-ffa450edef68 --- .../org/apache/fop/layoutmgr/table/ActiveCell.java | 250 +++++++++++++++++++++ .../apache/fop/layoutmgr/table/TableStepper.java | 225 +------------------ 2 files changed, 251 insertions(+), 224 deletions(-) create mode 100644 src/java/org/apache/fop/layoutmgr/table/ActiveCell.java (limited to 'src/java/org/apache/fop') diff --git a/src/java/org/apache/fop/layoutmgr/table/ActiveCell.java b/src/java/org/apache/fop/layoutmgr/table/ActiveCell.java new file mode 100644 index 000000000..aa5f14b59 --- /dev/null +++ b/src/java/org/apache/fop/layoutmgr/table/ActiveCell.java @@ -0,0 +1,250 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/* $Id$ */ + +package org.apache.fop.layoutmgr.table; + +import java.util.List; + +import org.apache.fop.layoutmgr.ElementListUtils; +import org.apache.fop.layoutmgr.KnuthBox; +import org.apache.fop.layoutmgr.KnuthElement; +import org.apache.fop.layoutmgr.KnuthPenalty; + +class ActiveCell { + private PrimaryGridUnit pgu; + /** Knuth elements for this active cell. */ + private List elementList; + private boolean prevIsBox = false; + /** Number of the row where the row-span begins, zero-based. */ + private int startRow; + /** Index, in the list of Knuth elements, of the element starting the current step. */ + private int start; + /** Index, in the list of Knuth elements, of the element ending the current step. */ + private int end; + /** + * Total length of the Knuth elements already included in the steps, up to the + * current one. + */ + private int width; + private int remainingLength; + private int baseWidth; + private int totalLength; + private int includedLength; + private int borderBefore; + private int borderAfter; + private int paddingBefore; + private int paddingAfter; + private boolean keepWithNextSignal; + private int lastPenaltyLength; + + ActiveCell(PrimaryGridUnit pgu, EffRow row, int rowIndex, EffRow[] rowGroup, TableLayoutManager tableLM) { + this.pgu = pgu; + boolean makeBoxForWholeRow = false; + if (row.getExplicitHeight().min > 0) { + boolean contentsSmaller = ElementListUtils.removeLegalBreaks( + pgu.getElements(), row.getExplicitHeight()); + if (contentsSmaller) { + makeBoxForWholeRow = true; + } + } + if (pgu.isLastGridUnitRowSpan() && pgu.getRow() != null) { + makeBoxForWholeRow |= pgu.getRow().mustKeepTogether(); + makeBoxForWholeRow |= pgu.getTable().mustKeepTogether(); + } + if (makeBoxForWholeRow) { + elementList = new java.util.ArrayList(1); + int height = row.getExplicitHeight().opt; + if (height == 0) { + height = row.getHeight().opt; + } + elementList.add(new KnuthBoxCellWithBPD(height)); + } else { + elementList = pgu.getElements(); +// if (log.isTraceEnabled()) { +// log.trace("column " + (column+1) + ": recording " + elementLists.size() + " element(s)"); +// } + } + totalLength = ElementListUtils.calcContentLength(elementList); + if (pgu.getTable().isSeparateBorderModel()) { + borderBefore = pgu.getBorders().getBorderBeforeWidth(false) + + tableLM.getHalfBorderSeparationBPD(); + borderAfter = pgu.getBorders().getBorderAfterWidth(false) + + tableLM.getHalfBorderSeparationBPD(); + } else { + borderBefore = pgu.getHalfMaxBeforeBorderWidth(); + borderAfter = pgu.getHalfMaxAfterBorderWidth(); + } + paddingBefore = pgu.getBorders().getPaddingBefore(false, pgu.getCellLM()); + paddingAfter = pgu.getBorders().getPaddingAfter(false, pgu.getCellLM()); + start = 0; + end = -1; + startRow = rowIndex; + keepWithNextSignal = false; + computeBaseWidth(rowGroup); + remainingLength = totalLength; + goToNextLegalBreak(); + } + + private void computeBaseWidth(EffRow[] rowGroup) { + width = 0; + includedLength = -1; // Avoid troubles with cells having content of zero length + for (int prevRow = 0; prevRow < startRow; prevRow++) { + width += rowGroup[prevRow].getHeight().opt; + } + baseWidth = width; + } + + boolean endsOnRow(int rowIndex) { + return rowIndex == startRow + pgu.getCell().getNumberRowsSpanned() - 1; + } + + int getRemainingHeight(int activeRowIndex, EffRow[] rowGroup) { + if (!endsOnRow(activeRowIndex)) { + return 0; + } else if (includedLength == totalLength) { + return 0; + } else { + return remainingLength + borderBefore + borderAfter + paddingBefore + paddingAfter; + } + } + + private void goToNextLegalBreak() { + lastPenaltyLength = 0; + boolean breakFound = false; + while (!breakFound && end + 1 < elementList.size()) { + end++; + KnuthElement el = (KnuthElement)elementList.get(end); + if (el.isPenalty()) { + prevIsBox = false; + if (el.getP() < KnuthElement.INFINITE) { + //First legal break point + lastPenaltyLength = el.getW(); + breakFound = true; + } + } else if (el.isGlue()) { + if (prevIsBox) { + //Second legal break point + breakFound = true; + } else { + width += el.getW(); + } + prevIsBox = false; + } else { + prevIsBox = true; + width += el.getW(); + } + } + } + + int getNextStep() { + if (!includedInLastStep()) { + return width + lastPenaltyLength + borderBefore + borderAfter + paddingBefore + paddingAfter; + } else { + start = end + 1; + if (end < elementList.size() - 1) { + + goToNextLegalBreak(); + return width + lastPenaltyLength + borderBefore + borderAfter + paddingBefore + paddingAfter; + } else { + return 0; + } + } + } + + private boolean includedInLastStep() { + return includedLength == width; + } + + boolean signalMinStep(int minStep) { + if (width + lastPenaltyLength + borderBefore + borderAfter + paddingBefore + paddingAfter <= minStep) { + includedLength = width; + computeRemainingLength(); + return false; + } else { + return baseWidth + borderBefore + borderAfter + paddingBefore + paddingAfter > minStep; + } + } + + private void computeRemainingLength() { + remainingLength = totalLength - width; + int index = end + 1; + while (index < elementList.size()) { + KnuthElement el = (KnuthElement)elementList.get(index); + if (el.isBox()) { + break; + } else if (el.isGlue()) { + remainingLength -= el.getW(); + } + index++; + } + } + + boolean contributesContent() { + return includedInLastStep() && end >= start; + } + + boolean hasStarted() { + return includedLength > 0; + } + + boolean isFinished() { + return includedInLastStep() && (end == elementList.size() - 1); + } + + GridUnitPart createGridUnitPart() { + if (end + 1 == elementList.size()) { + if (pgu.getFlag(GridUnit.KEEP_WITH_NEXT_PENDING)) { + keepWithNextSignal = true; + } + if (pgu.getRow() != null && pgu.getRow().mustKeepWithNext()) { + keepWithNextSignal = true; + } + } + if (start == 0 && end == 0 + && elementList.size() == 1 + && elementList.get(0) instanceof KnuthBoxCellWithBPD) { + //Special case: Cell with fixed BPD + return new GridUnitPart(pgu, 0, pgu.getElements().size() - 1); + } else { + return new GridUnitPart(pgu, start, end); + } + } + + boolean isLastForcedBreak() { + return ((KnuthElement)elementList.get(end)).isForcedBreak(); + } + + int getLastBreakClass() { + return ((KnuthPenalty)elementList.get(end)).getBreakClass(); + } + + boolean keepWithNextSignal() { + return keepWithNextSignal; + } + + /** + * Marker class denoting table cells fitting in just one box (no legal break inside). + */ + private static class KnuthBoxCellWithBPD extends KnuthBox { + + public KnuthBoxCellWithBPD(int w) { + super(w, null, true); + } + } +} diff --git a/src/java/org/apache/fop/layoutmgr/table/TableStepper.java b/src/java/org/apache/fop/layoutmgr/table/TableStepper.java index 43eb690a2..358f22535 100644 --- a/src/java/org/apache/fop/layoutmgr/table/TableStepper.java +++ b/src/java/org/apache/fop/layoutmgr/table/TableStepper.java @@ -29,9 +29,7 @@ import org.apache.fop.fo.Constants; import org.apache.fop.fo.FONode; import org.apache.fop.fo.flow.TableRow; import org.apache.fop.layoutmgr.BreakElement; -import org.apache.fop.layoutmgr.ElementListUtils; import org.apache.fop.layoutmgr.KnuthBox; -import org.apache.fop.layoutmgr.KnuthElement; import org.apache.fop.layoutmgr.KnuthGlue; import org.apache.fop.layoutmgr.KnuthPenalty; import org.apache.fop.layoutmgr.LayoutContext; @@ -42,217 +40,6 @@ import org.apache.fop.layoutmgr.Position; */ public class TableStepper { - private static class ActiveCell { - private PrimaryGridUnit pgu; - /** Knuth elements for this active cell. */ - private List elementList; - private boolean prevIsBox = false; - /** Number of the row where the row-span begins, zero-based. */ - private int startRow; - /** Index, in the list of Knuth elements, of the element starting the current step. */ - private int start; - /** Index, in the list of Knuth elements, of the element ending the current step. */ - private int end; - /** - * Total length of the Knuth elements already included in the steps, up to the - * current one. - */ - private int width; - private int remainingLength; - private int baseWidth; - private int totalLength; - private int includedLength; - private int borderBefore; - private int borderAfter; - private int paddingBefore; - private int paddingAfter; - private boolean keepWithNextSignal; - private int lastPenaltyLength; - - ActiveCell(PrimaryGridUnit pgu, EffRow row, int rowIndex, EffRow[] rowGroup, TableLayoutManager tableLM) { - this.pgu = pgu; - boolean makeBoxForWholeRow = false; - if (row.getExplicitHeight().min > 0) { - boolean contentsSmaller = ElementListUtils.removeLegalBreaks( - pgu.getElements(), row.getExplicitHeight()); - if (contentsSmaller) { - makeBoxForWholeRow = true; - } - } - if (pgu.isLastGridUnitRowSpan() && pgu.getRow() != null) { - makeBoxForWholeRow |= pgu.getRow().mustKeepTogether(); - makeBoxForWholeRow |= pgu.getTable().mustKeepTogether(); - } - if (makeBoxForWholeRow) { - elementList = new java.util.ArrayList(1); - int height = row.getExplicitHeight().opt; - if (height == 0) { - height = row.getHeight().opt; - } - elementList.add(new KnuthBoxCellWithBPD(height)); - } else { - elementList = pgu.getElements(); -// if (log.isTraceEnabled()) { -// log.trace("column " + (column+1) + ": recording " + elementLists.size() + " element(s)"); -// } - } - totalLength = ElementListUtils.calcContentLength(elementList); - if (pgu.getTable().isSeparateBorderModel()) { - borderBefore = pgu.getBorders().getBorderBeforeWidth(false) - + tableLM.getHalfBorderSeparationBPD(); - borderAfter = pgu.getBorders().getBorderAfterWidth(false) - + tableLM.getHalfBorderSeparationBPD(); - } else { - borderBefore = pgu.getHalfMaxBeforeBorderWidth(); - borderAfter = pgu.getHalfMaxAfterBorderWidth(); - } - paddingBefore = pgu.getBorders().getPaddingBefore(false, pgu.getCellLM()); - paddingAfter = pgu.getBorders().getPaddingAfter(false, pgu.getCellLM()); - start = 0; - end = -1; - startRow = rowIndex; - keepWithNextSignal = false; - computeBaseWidth(rowGroup); - remainingLength = totalLength; - goToNextLegalBreak(); - } - - private void computeBaseWidth(EffRow[] rowGroup) { - width = 0; - includedLength = -1; // Avoid troubles with cells having content of zero length - for (int prevRow = 0; prevRow < startRow; prevRow++) { - width += rowGroup[prevRow].getHeight().opt; - } - baseWidth = width; - } - - private boolean endsOnRow(int rowIndex) { - return rowIndex == startRow + pgu.getCell().getNumberRowsSpanned() - 1; - } - - int getRemainingHeight(int activeRowIndex, EffRow[] rowGroup) { - if (!endsOnRow(activeRowIndex)) { - return 0; - } else if (includedLength == totalLength) { - return 0; - } else { - return remainingLength + borderBefore + borderAfter + paddingBefore + paddingAfter; - } - } - - private void goToNextLegalBreak() { - lastPenaltyLength = 0; - boolean breakFound = false; - while (!breakFound && end + 1 < elementList.size()) { - end++; - KnuthElement el = (KnuthElement)elementList.get(end); - if (el.isPenalty()) { - prevIsBox = false; - if (el.getP() < KnuthElement.INFINITE) { - //First legal break point - lastPenaltyLength = el.getW(); - breakFound = true; - } - } else if (el.isGlue()) { - if (prevIsBox) { - //Second legal break point - breakFound = true; - } else { - width += el.getW(); - } - prevIsBox = false; - } else { - prevIsBox = true; - width += el.getW(); - } - } - } - - int getNextStep() { - if (!includedInLastStep()) { - return width + lastPenaltyLength + borderBefore + borderAfter + paddingBefore + paddingAfter; - } else { - start = end + 1; - if (end < elementList.size() - 1) { - - goToNextLegalBreak(); - return width + lastPenaltyLength + borderBefore + borderAfter + paddingBefore + paddingAfter; - } else { - return 0; - } - } - } - - private boolean includedInLastStep() { - return includedLength == width; - } - - boolean signalMinStep(int minStep) { - if (width + lastPenaltyLength + borderBefore + borderAfter + paddingBefore + paddingAfter <= minStep) { - includedLength = width; - computeRemainingLength(); - return false; - } else { - return baseWidth + borderBefore + borderAfter + paddingBefore + paddingAfter > minStep; - } - } - - private void computeRemainingLength() { - remainingLength = totalLength - width; - int index = end + 1; - while (index < elementList.size()) { - KnuthElement el = (KnuthElement)elementList.get(index); - if (el.isBox()) { - break; - } else if (el.isGlue()) { - remainingLength -= el.getW(); - } - index++; - } - } - - boolean contributesContent() { - return includedInLastStep() && end >= start; - } - - boolean hasStarted() { - return includedLength > 0; - } - - boolean isFinished() { - return includedInLastStep() && (end == elementList.size() - 1); - } - - GridUnitPart createGridUnitPart() { - if (end + 1 == elementList.size()) { - if (pgu.getFlag(GridUnit.KEEP_WITH_NEXT_PENDING)) { - log.debug("PGU has pending keep-with-next"); - keepWithNextSignal = true; - } - if (pgu.getRow() != null && pgu.getRow().mustKeepWithNext()) { - log.debug("table-row causes keep-with-next"); - keepWithNextSignal = true; - } - } - if (start == 0 && end == 0 - && elementList.size() == 1 - && elementList.get(0) instanceof KnuthBoxCellWithBPD) { - //Special case: Cell with fixed BPD - return new GridUnitPart(pgu, 0, pgu.getElements().size() - 1); - } else { - return new GridUnitPart(pgu, start, end); - } - } - - boolean isLastForcedBreak() { - return ((KnuthElement)elementList.get(end)).isForcedBreak(); - } - - int getLastBreakClass() { - return ((KnuthPenalty)elementList.get(end)).getBreakClass(); - } -} - /** Logger **/ private static Log log = LogFactory.getLog(TableStepper.class); @@ -427,7 +214,7 @@ public class TableStepper { for (Iterator iter = activeCells.iterator(); iter.hasNext();) { ActiveCell activeCell = (ActiveCell) iter.next(); allCellsHaveContributed &= activeCell.hasStarted(); - signalKeepWithNext |= activeCell.keepWithNextSignal; + signalKeepWithNext |= activeCell.keepWithNextSignal(); } if (!allCellsHaveContributed) { //Not all cells have contributed to a newly started row. The penalty here is @@ -579,14 +366,4 @@ public class TableStepper { private TableLayoutManager getTableLM() { return this.tclm.getTableLM(); } - - /** - * Marker class denoting table cells fitting in just one box (no legal break inside). - */ - private static class KnuthBoxCellWithBPD extends KnuthBox { - - public KnuthBoxCellWithBPD(int w) { - super(w, null, true); - } - } } -- cgit v1.2.3