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From "Kejia Ye (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ODFTOOLKIT-334) Add new API to support table autoformat
Date Mon, 20 Aug 2012 07:39:38 GMT

    [ https://issues.apache.org/jira/browse/ODFTOOLKIT-334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13437713#comment-13437713
] 

Kejia Ye commented on ODFTOOLKIT-334:
-------------------------------------

Two new API are added to support load and apply table template.  Please review and give your
comments.

1. Add API in Document to load load a table template from external table.
/**
	 * Construct a  <code>TableTemplate<code> feature by extracting style template
from an pre-defined table in a foreign document. 
         * The styles loaded by the template will be copied into the document as well and
can be referenced by table directly.
         *
	 * The imported table need to be at least a 5*5 table (e.g. A1E5).  Each type of style in
the template will be set according to the style reference in a specific table cell, as following:
	 * <br>first column - A2
	 * <br>last column - E2
	 * <br>first row - A2
	 * <br>last row - E2
	 * <br>even rows - B3
	 * <br>odd rows - B2
	 * <br>even columns - C2
	 * <br>odd columns - B2
	 * <br>body - B2
	 * <br>first-row-start-column -A1
	 * <br>first-row-end-column -E1
	 * <br>last-row-start-column -A5
	 * <br>last-row-end-column -E5
	 * 
	 * @param templateFileInputStream
	 *            - the InputStream of the ODF document.
	 * @param tableName
	 *            - the table name which will be used to load styles as template
	 * @throws Exception
	 *             - if content DOM could not be initialized
	 */
	public TableTemplate LoadTableTemplateFromForeignTable(
			InputStream templateFileInputStream, String tableName) 

2. Add  API in Table.java to apply styles specified in a table template.

/**
	 * Apply the formatting specified in the template to corresponding table cells.
	 * 
	 * A table can only be formatted as one type of styles: even-odd-rows or
	 * even-odd-columns. The rule is to check the style of odd rows and even
	 * rows in the template, only if they have one different properties, table:
	 * style-name or table:paragraph-style-name, the table template will be
	 * treated as a even-odd-columns styled table.
	 * 
	 * If one style in the template is null, the style of corresponding cells
	 * will be removed. An empty template can be used to remove all the styles
	 * in a table.
	 * 
	 * @param template
	 * @throws IllegalArgumentException
	 *             if the given template is null
	 * @throws Exception
	 *             if content DOM could not be initialized
	 */
	public void applyStyle(TableTemplate template)

3.  Add class of TableTemplate.java.
/**
 * TableTemplate represents the table template feature in ODF documents.
 * <p>
 * Besides the seven types of style (first row, first column, last row, last
 * column, even/odd rows,even/odd columns and body) defined by
 * <code>table:table-template</code> in ODF 1.2, TableTemplate provide extension
 * mechnism, which allows user to specify style value to additional cells. For
 * example, in ODF 1.2 the four coner cells can only inherit styles from the
 * colum or row they are existing, but through TableTemplate.ExtendedStyleType,
 * they can reference any style defined in the document.
 * <p>
 * TableTemplate provide method to get/set a set of references to table cell
 * styles that specify the formatting to be used on a table.
 * 
 */

 
                
> Add new API to support table autoformat
> ---------------------------------------
>
>                 Key: ODFTOOLKIT-334
>                 URL: https://issues.apache.org/jira/browse/ODFTOOLKIT-334
>             Project: ODF Toolkit
>          Issue Type: New Feature
>          Components: simple api
>    Affects Versions: 0.7
>            Reporter: Kejia Ye
>             Fix For: 0.8
>
>         Attachments: patch_tabletemplate.patch, TableTemplate.odt, TestTableTemplate.odt
>
>
> See previous discussion in the mailing list http://markmail.org/thread/edmejexrfv3m6cdn
>  
> I'd like to propose a new Simple API which could provide a similar function in OpenOffice
as ' Table > AutoFormat'. This will allow users to define their own table template once
and apply them anywhere they need. Since the <table:table template> doesn't have higher-level
support yet, API has to define and extract such template from existing table and serialize
them into separated elements at current stage.
> Proposed Solution:
> 1. User need to define their own table, as a table template, in a document by ODF editor.
> 2. Add two Simple APIs:
>   * Need new API to import table style from appointed table.
>   * Need new API to apply table style definition to table.
> Since it's difficult to recognize all kinds of style combination, we could use the definition
of <table:table template> to define and copy table styles.  It means API can recognize
and copy 6 types of cell styles from source table to target table.
> 	1. first column
> 	2. last column
> 	3. first row
> 	4. last row
> 	5. even rows, odd rows
>      6. even columns, odd rows
> Considering performance and complexity, we'd better restrict the size of imported table,
basically a 5*5 table (A1:E5) would be enough. We can get each type of style from an appointed
cell.
> 	1. first column ( A2)
> 	2. last column (E2)
> 	3. first row (B2)
> 	4. last row (B5)
> 	5. even rows (B3),  odd rows (B2)
> 	6. even columns: (C2), odd rows (B2)
> For each type of style, API can copy two definitions <table: style-name> and <table:
paragraph-style-name>, which displayed as number format, font, alignment, borders and background.
> In ODF specs, there's some restriction on table template definition. If more than one
style reference is applied to a cell, it has to follow the order. It means if a table has
even/odd row style, it cannot apply even/odd column style at the same time. Besides that,
the four corner cell can only inherit the style from the column or the row they exists, and
cannot been appointed to other values. Actually, user may need more complicated template than
that, like some complicated template pre-defined in OO. Maybe we could consider more extensibility
when defining table template in API according to real requirements. 

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