JPS62245286A - Character string display system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a character string display method, and more specifically, it is used in terminal devices, workstations, etc. that display character strings on the screen, especially when large and small characters are mixed. This invention relates to a string display method suitable for speeding up the rewriting and editing of displayed strings.

[Prior Art] Conventionally, terminal devices, word processors, and the like display a mixture of characters of different sizes, such as half-width characters, full-width characters, or enlarged characters thereof. When displaying these character strings, when specifying the writing position of a character for correction or the range to be edited, conventionally, as described in Japanese Patent Application Laid-Open No. 1737831/1983, it was done in character units. The designation has been made.

[Problems to be solved by the invention] In the conventional character string display method, in a character display area where characters of different sizes are displayed, it is possible to write or edit characters by specifying any cell position in the character display area. Unless the business program always knows the position and size of each character displayed in the display area, it is not possible to accurately rewrite the contents of the display area. Can not.

For this reason, there is a problem in that the processing contents of the business program become complicated, making it difficult to develop the business program.

The purpose of the present invention is to divide and manage the display area into cells of half-width character size, which is the smallest displayed character, so that operations such as writing, editing, etc. of characters can be performed by specifying any cell position. It is to make it.

[Means for Solving the Problems] In order to achieve the above object, in the character string display area control unit according to the present invention, data representing the attributes of each cell constituting one display area is stored in the display area management codel. Hold. In this case, the data to be retained is the cell that serves as the reference position when displaying characters (hereinafter referred to as the parent cell).
or any other cell (hereinafter referred to as a child cell); if the cell is a parent cell, data indicating the cell range occupied by the character; and if the cell is a child cell. If so, data indicating the position of the corresponding parent cell is included. By managing the attributes of each cell in this way, you can specify any cell position in a display area where large and small characters are mixed, and perform editing operations such as writing, inserting, and deleting characters. .

[Operation] With the above configuration, for example, when specifying a certain cell position in the display area and overwriting a character, by checking the attributes of the cells included in the range occupied by the overwritten character, you can check the attributes of the cells that overlap with the overwritten character. The positions of characters and the cell ranges occupied by those characters can all be determined. Therefore, by erasing overwritten characters before displaying these characters, inconsistencies in single display control and display data management can be eliminated.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a computer system for implementing the present invention. In FIG. 1, 101 is a business program that determines the output content or format of various information including character strings, and the second program is a program that runs on a computer constituting one display terminal device and one display terminal device. In some cases, it may run on a separate computer. In the latter case.

A single display control command is sent to the terminal device via a transmission path such as a communication line. In either case, the output determined by the business program 101 is given to the terminal management unit 102 as a display control command.

The terminal management unit 102 includes a display control command analysis unit 103 that analyzes display control commands from a business program, a display area control unit 104 that operates the display area on the screen, and a display unit that manages data displayed within the display area. It consists of an area management table 105. The display control command sent from the business program is analyzed by the display control command analysis unit 103 and converted into an operation instruction for one display area, and then given to the display area control unit 104. The content of the display area management table 105 is changed according to the change, and screen display information corresponding to the change is generated and output to the display device 106. As a result, a screen corresponding to the operation content can be obtained.

Figure 2 shows the display area on the screen and the cell arrangement of one displayed character.6 The display area 201 is composed of rectangular areas (cells) arranged in a regular grid with a fixed number of rows and one digit. Ru.

Each cell is a display area corresponding to one half-width character, and each character occupies a single cell or a plurality of adjacent cells.

In Figure 2, the full-width double-height and double-width characters 202 occupy eight cells, and among these multiple cells, the cell that serves as the reference position when drawing characters is the parent cell, and the other cells are child cells. Define. Expanded cell arrangement e! As shown at 203, in this embodiment, the cell at the lower left corner of the character is designated as the parent cell. Furthermore, each child cell is given a cell number indicating its relative positional relationship with the parent cell. The cell number is
In the 0 display area, where the child cell to the right of the parent cell is set to 1 and increases by 1 each time you move from the bottom row to the top row to the right, the part that does not contain any display information is filled with half-width blank characters. It is assumed that

FIG. 3 shows a display area management table 105 for managing data corresponding to the display contents of the display area described above. A display area management table 105 includes the number of lines 301 and the number of digits 302 of one display area and the display area. The attribute 303 of each cell is held. A cell attribute 303 has a flag 304 indicating whether the cell is a parent cell. For parent cell, 30
As shown in 3A, the width 305 and height 306 (both in cell units) of the character to which the cell belongs and the character code 30
Hold 7. On the other hand, in the case of a child cell, 303
As shown in B, a cell number 308 indicating its parent cell is held.

As described above, by storing data indicating the range occupied by characters in the parent cell and data indicating the position of the parent cell of the character to which it belongs in the child cell, you can specify a specific cell range and specify its contents. When performing a change operation, all characters affected by the operation can be detected. Therefore, if there is a character that only partially rewrites the cell it occupies as a result of the above operation, delete those characters in advance, that is, replace all the cells occupied by that character with half-width blank characters. By deleting the information above as well, it is possible to prevent inconsistencies from occurring in the contents of display data.

In order to specifically illustrate the above process, Figure 4 shows an example of the process for overwriting the already displayed character string with another character, expressed in brooch yard format.
When overwriting characters.

First, a cell range that overlaps with the overwritten character is determined from the overwritten position and the size of the overwritten character (step 401), and then, the cell type is determined for all cells within that range (steps 402 to 403). If the cell is a child cell, find the position of the parent cell from the cell number in the cell attributes (step 404), then find the cell range occupied by the character from the attributes of the parent cell, and delete it ( Step 405), finally, after erasing all characters that overlap with the overwritten character, the overwritten character is written (step 4
06).

FIG. 5 is a flowchart showing an example of processing when editing operations such as deletion, insertion, and deletion are applied to the contents of a specific cell range within the display area. In this case, first find the boundary line between the area to be edited and the external area (step 501), then find all the cells that are in contact with this boundary line among the cells included in one editing target area. Step 50 to determine the type of cell for
2 to 503), if it is a child cell, find the parent cell position (
Step 504), Next, the cell range occupied by the character is determined from the attributes of the parent cell (Step 505), and it is determined whether the character straddles the border (Step 506). If the character exists across the boundary line, delete that character (step 507). After performing the above process for all cells touching the border line,
Add the specified editing operation to the editing target range (
Step 508).

Note that in this embodiment, the cell number representing the relative positional relationship with the parent cell is held as an attribute of the child cell, but it is also possible to directly hold the position of the parent cell or the address of the attribute data of the parent cell. It is also possible to adopt a method of doing so. Further, in this embodiment, the case where the parent cell position is located in the lower left column of the character has been described, but the present invention is applicable to cases where the parent cell is located anywhere within the character.

[Effects of the Invention] As explained above, according to the present invention, one display area is managed by dividing it into cells corresponding to the area of one half-width character, which is the smallest character to be displayed. It becomes possible to designate any cell position and perform operations such as writing and editing characters in a display area where a mixture of characters is displayed. Furthermore, according to the present invention, even if the business program does not know the position and size of each character displayed within the display area, it is possible to specify any cell position and rewrite the displayed content. Therefore, it is effective in simplifying business programs and improving processing speed.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a computer system showing an embodiment of the present invention, FIG. 2 is a diagram showing the structure of a display area and cell arrangement of characters on one screen, and FIG. 3 is a diagram showing the structure of a display area on one screen. Figures 4 and 5, which show the structure of a display area management table that is referenced and updated in the process of processing, are flowcharts that specifically show the process of overwriting characters and editing operations, respectively. . 105... Display area management table, 303A... Cell attribute of parent cell, 303B... Cell attribute of child cell. the second eye

Claims (1)

[Claims] In a system that displays character strings or various information containing character strings on the screen, when storing information regarding the character display area in the part that manages the display terminal device, information is stored for each cell, which is the display area for one half-width character. For characters that occupy multiple cells, the cell that serves as the standard position for character drawing stores information about the cell range occupied by the character, and other cells store information indicating the position of the standard cell, so the size can be adjusted. A character string display method is characterized in that it is possible to perform operations such as writing characters, uneven editing, etc. by specifying an arbitrary cell position in a character string display area where various characters are mixed.