KR100740502B1 - Method of printing tables included in web pages - Google Patents

Abstract

The present invention relates to a method of optimizing and printing a table included in a web document, and a method of printing a web document written in a markup language according to the present invention includes: parsing a plurality of entities included in a web document; And reconstructing and rendering the parsed entities according to a predetermined print paper, wherein the entities include an extension tag and an attribute for providing an extended print control function without changing the contents of the web document, Attribute provides a function of optimizing and printing cells of a table. Thus, the table included in the web document can be optimized and printed without changing the contents of the web document displayed on the screen.

Web document printing, print optimization, table optimization

Description

METHOD OF PRINTING Tables INCLUDED IN A WEB DOCUMENT

1 is a block diagram of a system for applying a web document print engine according to an embodiment of the present invention,

2 is a block diagram of a Web document print engine according to an embodiment of the present invention;

FIG. 3 is an overall flowchart illustrating a web document printing method according to an embodiment of the present invention;

FIG. 4 is a flowchart illustrating a method of optimizing a table print included in a web document according to an exemplary embodiment of the present invention;

FIG. 5 is a flowchart illustrating a method of optimizing a horizontally long table among the table printing methods shown in FIG. 4;

FIG. 6 is a flowchart illustrating a method of moving cells over an output area to another page among the optimization methods of the horizontally long table shown in FIG. 5;

FIGS. 7A to 7C are reference views for explaining a method of moving cells over an output area to another page when the cells are colspaned in the horizontal direction. FIG.

The present invention relates to a method of printing a web document, and more particularly, to a method of optimizing and printing a table included in a web document.

Web documents are written in markup languages such as HTML, XML, and XHTML according to the recommendations of the World Wide Web Consortium (W3C). A markup language includes various tags (tags or elements) and attributes and can be used to create various types of web documents.

However, conventional web browsers such as Internet Explorer using the markup language according to the W3C recommendation do not change the objects configured in the markup language included in the web document, but render them as a bitmap image as displayed on the screen and print . Accordingly, there is a problem in that a web document can not be printed by optimizing the format of a user's desired format such that a part of the web document is printed while being cut off or an unnecessary image or frame is printed. In particular, in the case of the <table> element representing the most frequently used table in the web contents, the table is often cut off when the long and long table is printed through the existing web browser. In addition, if the portion corresponding to the title of the table is repeated for each page, it is troublesome to re-create the contents for printing separately. This is because there is no way to control the printing of entities contained in a web document.

In order to solve this problem, a method of preparing a web document in advance in accordance with the print format, or a method of separately creating a web document to be displayed on the screen and a web document for printing may be used. In other words, the web printing method is mainly a database-based reporting tool, and the web developer uses SQL statements to represent the data in a fixed format table, so that it is suitable for printing the table from already created contents. There is no separate solution to optimize it so that when creating web content, you should configure the table in a size that is easy to print in advance. However, these methods have the disadvantage of imposing a double burden on the web designer to write a separate web document. In addition, there is a problem that a user can not print a web document in various formats in a desired format.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an effective web document printing method that provides an expanded print control function without changing the contents of a web document displayed on the screen. In particular, it provides a method of optimizing and printing a table included in a web document.

According to another aspect of the present invention, there is provided a method of printing a web document written in a markup language, the method comprising: parsing a plurality of objects included in a web document; And reconstructing and rendering the parsed entities according to a predetermined print paper, wherein the entities include an extension tag and an attribute for providing an extended print control function without changing the contents of the web document, Attribute is provided to optimize and print the cells of the table.

The extension tags and attributes preferably provide a function of separating the cells of a table that are long or long in length into the next page,

The extension tag and attribute preferably provide a function of separating the elements in the cell into the next page if the contents of the cell of the table are long,

The extension tags and attributes preferably provide the ability to iterate through a particular cell of a table on a page-by-page basis.

In particular, in the case of a table having a long width, the extended tag and the attribute are preferably separated into a next page cell exceeding the right margin of the printing paper,

In the case of a table having a long length, it is preferable to separate the cells beyond the bottom margin of the printing paper to the next page.

The extension tag and the attribute are desirably to cancel the cell merging when the long-horizontally long table is colspaned in the horizontal direction, and to separate the cells beyond the right margin of the printing paper into the next page,

The extension tag and the attribute are desirably to cancel the cell merging when the long vertical table is Rowspan in the vertical direction, and to separate the cells beyond the bottom margin of the printing sheet into the next page.

If the cell of the table can not be separated because the contents of the cell of the table are long, it is preferable to separate the elements in the cell beyond the bottom margin into the next page,

The extension tags and attributes preferably repeat the title or horizontal cell corresponding to the caption of the table,

Extension tags and attributes are preferably repeated in vertical cells that identify the contents of the table.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention of the user, the operator, or the custom. Therefore, the definition should be based on the contents throughout this specification.

1 is an example of a system applying a web document print engine according to an embodiment of the present invention.

Referring to FIG. 1, an application system according to an embodiment of the present invention includes a Web server 1, a browser 2, a Web print engine 3, and a printer or a preview object 4.

The web server 1 provides a web document written in a markup language including various tags and attributes. The web document 10 may further include various database data extracted from a database by using interfaces such as ASP, JSP, or CGI as well as various multimedia data. In particular, the web document according to the present invention includes extension tags and attributes that provide an extended print control function. Details of the extension tags and attributes will be described later.

The browser 2 is a tool mounted on a client and navigating various web documents from the web server 1. [ The browser 2 processes various tags and attributes according to the W3C recommendation included in the web document to display various multimedia objects on the screen. The browser 2 parses the tags and attributes included in the web document, forms a document object model, that is, a document object model (DOM) tree, and then displays the objects on the screen through a rendering process.

On the other hand, the web print engine 3 according to the present invention optimizes the output form of the web document based on the extension tag and the attribute included in the web document 10. The web print engine 3 can download or stream the web document 10 directly from the web server 1 or download or stream the web document 10 via the browser 2. [

More specifically, FIG. 2 is a block diagram of a Web document print engine according to an embodiment of the present invention.

Referring to FIG. 2, the web print engine 3 includes a parser 31 for parsing an extension tag and attribute to provide an extended print control function included in the web document 10, a parsed extension tag and attributes A DOM tree 32 constituting a document object model, and a renderer 33 for rendering the print format of the web document as a bitmap image based on the print control information included in the parsed extension tag and attribute .

The rendered image is output to paper or displayed as a screen via the printer or preview object (4). The web print engine 3 is installed in the web server and automatically downloaded to the user's computer. At this time, the user computer encompasses not only a personal computer but also a mobile phone, a personal digital assistant (PDA), a notebook, and a pocket PC. The web print engine 3 can output the optimized output through a preview object such as a printer or Previewdlg.

As described above, the web document 10 according to the present invention further includes extension tags and attributes for providing expanded printing functions in addition to general tags and attributes according to the W3C recommendation. The browser 2 processes only general tags and attributes included in the web document 10 and the extension tags and attributes according to the present invention separately in the web print engine 3. [ Therefore, various print control functions can be separately implemented without changing the web document displayed on the screen.

Hereinafter, an extension tag and attributes for providing an extended print control function according to the present invention will be described in more detail. These extension tags and attributes are not defined in the HTML standard, which is an existing W3C recommendation, and the browser 2 does not recognize it and is processed separately in the web print engine 3 according to the present invention for printing.

Hereinafter, an extension tag and attributes for optimizing and printing a table according to the present invention will be described in detail. As a property of the <TABLE> tag included in the existing W3C Recommendation, you can use the new extended properties to adjust the line width, width, and width of the table included in the Web document, optimize the table horizontally or vertically, Alternatively, a specific column or row can be repeatedly printed for each page. The following new properties are defined for this purpose.

function Extension Tags (HTML tag) Extension Attributes variable Explanation Table line thickness <TABLE> </ TABLE> Sets the line thickness of the table. PrnBorder unit Set the line thickness of the table. The basic unit is ㎛ (0.1mm -> 100㎛) Print Size <TABLE> </ TABLE> <TD> </ TD> <IMG> Sets the width and height of the table, specific cell, and image. PrnWidth unit Print width setting, base unit mm PrnHeight Print height setting, base unit mm Side table optimization <TABLE> </ TABLE> Optimize the width of long tables. CellOptimize Horizon Set the transverse cell exceeding the page to move to the next page with a specific cell (repeating cell) None Do not print horizontal cells beyond the page HCellRepeat a constant Set the range of horizontal Cells to be repeated in CellOptimize CellMove Auto It is set to print the cells on the border of the page horizontally on the bottom of the table when the width is long and the vertical is short. Next Move table to next page Vertical table optimization <TABLE> </ TABLE> Optimize the height of the long-length table. CellOptimize Vertical Set to move the vertical cell exceeding the page to the next page with a specific cell (repeat cell) None Do not print vertical cells that exceed the page VCellRepeat a constant Set the range of repeating vertical cells in CellOptimize (Horizontal / vertical) table optimization <TABLE> </ TABLE> Optimize both long and short tables. CellOptimize All Set to move the horizontal / vertical cell exceeding the page to the next page with a specific cell (repeat cell) Table separation <TABLE> </ TABLE> When one big cell in the table needs to be divided into two pages, it divides and draws a line at the bottom and top of the cell. CellOptimize Divide Divide Cells and set them to draw lines at the bottom and top Vertical Table Repeat Bundle <TABLE> </ TABLE> When CellOptimize = "Vertical" is set, the number of vertical lines to be bundled is set when the table is detached. Vline a constant Set the number of vertical lines to be caught by a bundle of lines

1) PrnBorder

An attribute that specifies the line thickness of the table is ㎛ used as a base unit.

2) PrnWidth and PrnHeight

Use mm as a base unit to specify the width and height of a specific cell in a table or table.

3) CellOptimize Horizon, HCellRepeat and CellMove

These are properties for optimizing horizontally long tables.

If Horizon is set as the CellOptimize property, the horizontal cells that exceed the print area are moved to the next page with the repeating cells to divide the table. Accordingly, in the case of a long table, the cell can be separated into the next page based on the right margin of the printing paper. That is, if the cell invades the right margin, it is judged as a cell to be separated to the next page. In this case, if the long table is composed of colspan, the merged cell can be separated and the separated cell can be passed to the next page. In addition, when the CellOptimize property is set to None, horizontal cells exceeding the print area are not printed.

On the other hand, the HCellRepeat attribute is used to specify a range of horizontal cells to be repeated, and a numerical value is used as a variable. Accordingly, it is possible to repeat the horizontal cell which distinguishes the title or the table corresponding to the caption of the table. For example, you can repeat the top cell of a table.

If the CellMove property is set to Auto, the cells in the horizontal border (right margin) of the page in the short table are printed next to the bottom of the table. If set to Next, the cells in the horizontal border are moved to the next page Print.

4) CellOptimize Vertical and VCellRepeat

These are properties for optimizing vertically long tables. If Vertical is set as the CellOptimize property, the vertical cells that exceed the print area are moved to the next page with the repeating cells to divide the table. Accordingly, in the case of a long-length table, the cell can be separated to the next page based on the bottom margin of the printing paper. In other words, if the cell invades the bottom margin, it is judged as a cell to be separated into the next page. In this case, if the vertically long table has cells merged by row merging, the merged cells can be separated and the separated cells can be passed to the next page. Also, when CellOptimize is set to None, vertical cells exceeding the print area are not printed.

On the other hand, the VCellRepeat attribute is used to specify the range of a vertical cell to be repeated, and a numerical value is used as a variable. Accordingly, it is possible to repeat the vertical cell that distinguishes the contents of the table. For example, the left cells of the table correspond to this.

5) CellOptimize All

It is a property for optimizing long tables both horizontally and vertically. If the CellOptimize property is set to All, the horizontal and vertical cells that exceed the print area are moved to the next page with the repeating cell to separate the table.

6) CellOptimize Divide

It is a property used to divide a large cell contained in a table into two pages on an element basis and to line the bottom and top of the divided cell. If the cell contents of the table are long and the cells can not be separated, if a plurality of elements included in the cell are invading the bottom margin, if the whole cell is separated into the next page, the elements in the cell are all separated as well. This will result in too many margins on the original page and poor print quality. In this case, rather than separating the entire cell into the next page, the elements in the cell can be identified and only the elements beyond the bottom margin can be separated into the next page.

It is also possible to separate elements in a cell even in the case of a nested table. Since web content is common when tables are nested multiple times, you can separate the elements in a cell by assigning attributes to all tables.

7) Vline

It is a property that specifies the number of vertical lines to be caught in one bundle when a vertically long table is set as CellOptimize = "Vertical". The number of vertical lines to be grouped into one line is used as a variable.

On the other hand, the web document 10 created using the above extended tags and attributes is printed in the following manner. 3 is an overall flowchart illustrating a web document printing method according to an embodiment of the present invention.

Referring to FIG. 3, the web print engine 3 according to the present invention parses entities included in a web document (S100). Common tags and attributes of parsed entities are processed by the browser and displayed on the screen. On the other hand, if there are extended tags and attributes among the parsed entities (S101), they are reconfigured according to the printing paper set through the web print engine 3 (S102). That is, the print format is optimized according to the set printing paper. The optimized objects are rendered as a bitmap image (S103).

In particular, FIG. 4 is a flowchart illustrating a method for optimizing table printing included in a web document according to an embodiment of the present invention.

Referring to FIG. 4, when the table size is out of the print area (S200), the CellOptimize attribute of the <Table> element is checked (S202). If CellOptimize = "Horizon ", the long horizontal table is cut based on the right margin, and the next page is passed (S204). If CellOptimize = "Vertical ", the vertically long table is cut based on the bottom margin, and the next page is passed (S206). If CellOptimize = "All ", first, a long horizontally long table is cut based on the right margin (S208), and the table of the next page is cut vertically based on the bottom margin (S210) . If CellOptimize = "Divide ", one large cell includes a plurality of elements. One cell is divided into units of elements in the cell, and lines are drawn at the lower and upper ends of the separated cells (S212). Accordingly, the table exceeding the print area can be appropriately divided into the next page in units of cells or elements, optimized, and printed.

When HCellRepeat = "number" is set for cell repetition, the designated number of horizontal cells is repeatedly printed for each page (S216). When VCellRepeat = "number" is set, Print. Accordingly, the cells corresponding to the title of the table like the caption can be repeatedly displayed for each page.

More specifically, an algorithm for implementing extended tags and attributes will be described below. For convenience of explanation, the case of a horizontally long cell is described as an example, but the same principle applies to a vertically long table or a horizontally and vertically long table.

Fig. 5 is a flowchart showing a method (B) for optimizing a horizontally long table among the table printing methods shown in Fig.

5, the index is initialized (S300), and the width of the cell is cumulatively calculated (S304) while incrementing the index by one (S302) until the horizontal direction cell of the table is terminated (S302). If the width of the accumulated cells exceeds the print area (S306), the remaining cells from the cell of the index to the last cell are moved to the next page (S310). The above process is repeated until the cumulative width is initialized (S312). Thus, in the case of a long-length table, it is observed that the cell width is accumulated one by one from the left to the end of the printing area, and then the remaining cells are separated from the cell which invades the right margin, .

More specifically, FIG. 6 is a flow chart illustrating a method (C) for moving cells over an output area to another page of the horizontally long table optimization method shown in FIG.

Referring to FIG. 6, in order to move cells over a printing area to another page, an index is initialized (S400) and a new row of a new table is created on the next page (S402 and S404). If the first cell is colspaned in the horizontal direction, the merged cells may be separated and the separated cells may be passed to the next page (S410, S412, and S414). If the cell is not merged, the cell is attached to a new row of the created table (S416). The above-described cell merging process steps (S410, S412, and S414) may be repeated for the number of merged cells (S406).

7A to 7C are reference views for explaining a method of moving cells over an output area to another page when the cells are colspaned in the horizontal direction.

FIG. 7A shows a table displayed on the screen before performing the table optimization. In this case, FIG. 7B shows the result of separating the cells without performing cell merging in the cells subjected to the cell merging in the horizontal direction, and FIG. 7C shows the result of separating the cells in the horizontal direction and separating the cells.

Meanwhile, the table printing method included in the web document according to the present invention can be written in a computer program. The codes and code segments that make up the program can be easily deduced by a computer programmer in the field. The program is stored in a computer readable medium, readable and executed by a computer, thereby implementing a table printing method included in a web document. The information storage medium includes a magnetic recording medium, an optical recording medium, and a carrier wave medium.

As described above, according to the present invention, there is provided an effective web document printing method for providing an expanded print control function without changing the contents of a web document displayed on the screen. In particular, a method of optimizing and printing a table included in a web document is provided.

This function separates cells that are not visible because the table is long and long, and separates the cells into the next page. When the table cell is long, it separates the cell into the next page in units of elements. By providing a function for displaying each page repeatedly, it is possible to optimize and display a table over the print area.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

Claims (11)

A method of printing a web document written in a markup language, Parsing a plurality of entities contained in the web document; And And reconstructing and rendering the parsed entities according to a predetermined print paper, Wherein the entities include an extension tag and an attribute for providing an extended print control function without changing the contents of the web document, wherein the extension tag and attribute provide a function of optimizing and printing the cells of the table How to print a Web document. The method according to claim 1, Wherein the extension tag and the attribute provide a function of separating a cell in which a horizontal or vertical length of the table is long and invisible to a next page. The method according to claim 1, Wherein the extension tag and the attribute provide a function of separating an element in a cell into a next page when the content of a cell of the table is long. The method according to claim 1, Wherein the extension tag and the attribute provide a function of repeating a specific cell of the table for each page. 3. The method of claim 2, Wherein the extension tag and the attribute separates the cells beyond the right margin of the print sheet into a next page in the case of a long-width table. 3. The method of claim 2, Wherein the extended tags and attributes are configured to separate cells beyond a bottom margin of a print sheet into a next page in the case of a long table. 6. The method of claim 5, Wherein the extended tag and the attribute are configured to cancel cell merging when a long table is colspaned in a horizontal direction, and to separate a cell over a right margin of a print sheet into a next page. The method according to claim 6, Wherein the extension tag and the attribute are configured to cancel the merging of the cells and to separate the cells over the bottom margin of the print sheet into the next page when the vertically long table is row-merged (Rowspan). The method of claim 3, Wherein the extension tag and the attribute are configured to divide an element in the cell beyond the bottom margin of the cell into a next page if the cell of the table is long and the cell can not be separated. 5. The method of claim 4, Wherein the extension tag and the attribute repeat the title or horizontal cell corresponding to the caption of the table. 5. The method of claim 4, Wherein the extension tag and the attribute repeat a vertical cell for identifying the contents of the table.

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