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Diffstat (limited to 'writerfilter/documentation/tablesInDoc.txt')
-rw-r--r-- | writerfilter/documentation/tablesInDoc.txt | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/writerfilter/documentation/tablesInDoc.txt b/writerfilter/documentation/tablesInDoc.txt new file mode 100644 index 000000000..50c58a4e2 --- /dev/null +++ b/writerfilter/documentation/tablesInDoc.txt @@ -0,0 +1,153 @@ +# +# This file is part of the LibreOffice project. +# +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. +# +# This file incorporates work covered by the following license notice: +# +# 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 . +# + +All paragraphs in tables: + + sprms: + 0x2416 (sprmPFInTable) indicates a paragraph is in a table + 0x6649 (sprmPTableDepth) demarks the nesting depth of the paragraph + +paragraph at nesting depth 1: + + end of cell: 0x7 + end of row: 0x7 + sprm 0x2417(sprmFTtp) + + the end of a row has its own 0x7 + +paragraphs at nesting depth > 1; + + end of cell: 0xd + sprm 0x244b(sprmPCell) + end of row 0xd + sprm 0x244b(sprmPCell) + sprm 0x244c(sprmPRow) + + the end of a row has its own 0xd + +Algorithm to detect table structure: + +Datastructures: + +RowData<Handle>: + int getCellCount() + // return number of cells in row + Handle getStart(i) + // get handle for start of cell i + Handle getEnd(i) + // get handle for end off cell i + Properties getProperties() + // return properties of row + +TableData<Handle>: + void addCell(Handle start, Handle end) + // insert cell starting at start and ending at end into the + // current row + void endRow(properties) + // end current row and save properties for that row, begin new row + int getRowCount + // return number of rows in table + RowData<Handle> getRow(i) + // get data for row i + +prevTableDepth + depth in table hierarchy of previous paragraph + +curTableDepth + depth in table hierarchy of current paragraph + +bInCell + true if current paragraph is in a cell + +bEndCell + true if current paragraph if the last paragraph of a cell + +bEndRow + true if current paragraph is the end of a row + +paragraphHandle + handle for current paragraph + +initial: + create stack of TableData<Handle> + +final: + handle remaining TableData<Handle> on stack + +creating StreamHandler: + push new TableData<Handle> on stack + +destroying StreamHandler: + handle TableData<Handle> on top of stack + pop TableData<Handle> from stack + +StreamHandler::substream: + push new TableData<Handle> on stack + handle TableData<Handle> on top of stack + pop TableData<Handle> from stack + +starting paragraph group: + paragraphHandle = currentHandle; + bInCell = false; + bCellEnd = false; + bRowEnd = false; + +ending paragraph group: + difference = curTableDepth - prevTableDepth + + if (difference > 0) + push difference new TableData<Handle> onto stack + else if (difference < 0) + { + repeat difference times + { + handle top of stack + pop stack + } + } + precTableDepth = curTableDepth + + if (bInCell) + { + if (handleStart is null) + handleStart = paragraphHandle; + + if (bCellEnd) + { + stack.top().addCell(handleStart, paragraphHandle); + clear handleStart + } + + if (bRowEnd) + { + stack.top().endRow(properties) + } + + +in StreamHandler::props: + save properties + +PropertiesHandler::sprm: + sprm 0x6649: + save value in curTableDepth + sprm 0x2416: + bInCell = true + sprm 0x244b: + bCellEnd = true + sprm 0x2417: + bRowEnd = true + +text: + 0x7: + bCellEnd = true |