JPS59214936A - Character processor - Google Patents

Abstract

PURPOSE:To minimize the consumption of storage area of a line buffer by processing data structure in the line buffer in the same manner as a case of deleting corrected characters at the correcting operation of overlapped characters, and reinputting the data in an underline mode. CONSTITUTION:Data previously stored in the line biffer LB of an RAM are displayed on a display device DS. When the display surface of the display device DS is the state shown in the figure A, for instance, the data structure in the line buffer LB attains to the state shown in the figure A' corresponding to the figure A. When the operator moves the position of a carsor CS on the display device DS to the position of an alphabet D on the display DS screen and depresses an underline key, the character information D already stored in the buffer LB and the inputted underline information ''-'' are located on the same address position and are overlapped characters. A CPU decides that these overlapped characters are equivalent to the underline mode -D of a character code D and replaces the character code D on the buffer LB by D which is the data based upon the underline mode.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a character processing device, and in particular, to a character processing device such as an electronic typewriter or a character editing device (word processor) that stores input character information and processes the character information as necessary. This invention relates to a character processing device that can call up and make corrections and reprints.

Prior Art Conventionally, in character processing devices such as electronic typewriters,
For example, a so-called overlapping character input/output method is generally adopted, in which pressing the Kasumi key and the Snake key on the keyboard at the same position allows the expression of "\". Similarly, an angline symbol is added to the printed character string by overlapping the day key indicating that it is an angline symbol.

Furthermore, in recent years, with the advent of electronic typewriters with storage devices equipped with five angline modes, the anglining of printed characters has become automated. Furthermore, by storing the input character string data in a line buffer (specific area) within the storage device, it has become possible to correct or reprint the input data. In such electronic typewriters, if you want to correct character data stored in the line buffer to an unlined character, the character data is generally called up on the display, ■ After deleting that character data, The λ-through operation method is adopted, either by re-entering the character data in the mode, or by superimposing an angle line on the character data using the overlapping character method.

To explain this in detail, Figure 1 (2) shows character data "DATE" without an Angline, and Figure 7 shows character data with Anglines "DA'L"E" output and displayed on the display DS. The following is a case: If you want to correct the character data "DATE" without an angle line in Figure 1 (■) to one with an angle line in Figure 1, use the above-mentioned ■ or ■.
requires one of the following operations.

Figure 2 (2) is an example of the data structure in the line code when the input operation in the above-mentioned ``underline'' mode is performed using a conventional device. An example of the data structure in the line buffer after each operation is shown. "→" and "←" in the figure
汀↑” and “↓” are special codes that indicate the mode.
, "→" is a mode start code with an angle line, "←" is a mode end code with an angle line, "↑" is an overlap start code, and "↓" is an overlap end code. code"
"→" and "←" form a pair, indicating that the angline mode applies to the character codes enclosed by this pair of codes. Similarly, the codes "↑" and "↓" form a pair, and the character codes surrounded by this pair of codes indicate that they are outputted overlappingly at the same position.

In this way, in the conventional device, as shown in Figure 1 and Figure 1, the data structure in the line buffer is different, reflecting the difference in the operations in Figure 1 and Figure 1.
As shown in the figure, when the output is displayed on the display or when it is printed on recording paper, the difference in the data structure in the line buffer does not appear at all.

However, when an operator tries to perform a character string search operation, there has been an inconvenience in that some cases are searched and some cases are not searched due to differences in the data structure within the line buffer. Furthermore, although the input operation using the overlapping character method (■) described above is easier than the input operation using the underground mode (■), the amount of stored data increases considerably as shown in Figure It had the disadvantage of increasing space (memory) consumption.

Purpose The purpose of the present invention is to eliminate the above-mentioned drawbacks, and to correct data stored in a storage means into overlapping character data such as unlined data using a so-called overlapping character method. Even if an input operation is performed, the contents stored in the storage means are converted into the contents of the same data structure as in the case of a correction input operation in a special mode such as an unlined mode.

It is an object of the present invention to provide a character processing device which eliminates the inability to search and reduces storage capacity while maintaining ease of operation by using a unique data structure system.

Example Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 3 shows an example of the configuration of the character processing device of the present invention, where the CPU is a microprocessor that performs calculations and logical judgments for character processing, and includes an address bus, a control bus, and a data bus. System bus S
Each component connected to the system bus SB is controlled via the system bus SB. KB is a keyboard, which is equipped with letters and symbols input keys such as alphabet keys, and various function keys for instructing various functions and an angline character mode for the processing device.

RAM is a writable random access memory that temporarily stores various data sent from each component. In particular, there is a line buffer LB in the memory RAM that stores character codes, etc. as shown in Figure 9 (2) to ■. Character information input from the keyboard is converted to the character code corresponding to this character information. After being converted, it is stored in this line buffer L13. The ROM is a read-only fixed memory (read-only memory) in which procedures for controlling the microprocessor CPU are stored in advance.

The DSO is a display control device that controls a display DS using a cathode ray tube or the like to output and display input information from the keyboard KB or contents stored in the line buffer LB on its display screen. The PTO is a printing control device that controls a printing device PT, such as a serial printer, to print the contents stored in the line buffer LB on recording paper according to instructions from the microprocessor CPU.

Next, referring to Figures ■ to ■, call the data "DA'[IC'" previously stored in the line buffer LB of the random access memory RAM in Figure 3 to the display operator S and output it. This section explains the control operation and changes in the data structure in the line buffer LB when displaying the data "DATE" and sequentially overlapping the unlined symbol indicating that an unlined character should be added to each character of the data "DATE" and correcting it as overlapping characters. .

When the display surface of the display device DS is in the state shown in FIG. 7(2), the data structure in the line buffer LB is in the corresponding state shown in FIG. 7(2). At this time, the operator moves the position of the cursor C8 (see FIG. 1 (2)) on the display DS to the position of the alphabet "D" on the display DS screen, and presses the underground key ( day key)
When you press , the character information "D" stored in Nokutsufa L]3 and the input underline information "-'' are located at the same cursor position (same address position), so they are overlapping characters. The microprocessor (3
The PU makes a judgment and replaces the character code ``D'' on the line buffer L13 with the character code →D←'', which is data in the unlined mode (see Figure 2). In Figure 1), the symbols "→" and "←" respectively indicate the mode start code with an angle line and the mode end code with an angle line, as described above. Encloses the character code DI+.

Furthermore, if the next character information "A" is to be overlaid with an underground character, the operator should move the cursor C8 to the position of the alphabet "A" on the display DS screen, and then write the underground character on the keyboard KB. You will have to press the ink key (date key), but in this case, it is assumed that both the character codes "DI+" and "A I+" will be in the Angline mode, and both character codes "DA" will be pressed. The buffer LB is surrounded by the angline mode start code "→" and the angline mode end code "←".
Replace the data in (see Figure 0).

Therefore, when replacing data, for example, it is always determined whether the preceding adjacent data is the code "←", and if it is the code "←", the replacement data is inserted before that code "←". I'm doing K.

Below, changes in the state of the data structure in the line buffer LB when the character information "TI+" and "E" are overlaid with an unlined line are shown in Figures 1 and 2, respectively.

It is a chart.

First, in step 5 S/, the cursor cs is moved to the beginning of the character to be corrected as an overlapping character.

In the next step SJ, a key force from the keyboard KB is waited for, and if there is a key force, the process advances to step S3, and a key code corresponding to the key force is read. 5 more
In step Sll, it is determined whether the input key is an underground key or not, and if it is an underground key, the process proceeds to step SS.

The address immediately before the cursor position is &6 with the code “←”
If the code is "←", proceed to step SA and change the data at the cursor position to "→J" and "
Enclose it with the ``←'' code and move the cursor C8 to the next character position after the ``←'' code.

Then, the process returns to step S-5 and waits for the next key to be pressed.

On the other hand, if it is affirmatively determined in step SS that the address immediately before the cursor position is the code "←", the process proceeds to step S, swaps the data at the cursor position with the code "←", and moves the cursor C8 by one character. Move to the right. The process then returns to step S2 and waits for the next key to be pressed.

In addition, when a negative determination is made in step SII that the key is not an underground key, the process proceeds to step sg, and processing for overlapping characters with a key other than an underground key is performed. Next, the process returns to step Sλ and waits for the next key to be pressed.

By sequentially repeating steps S/ to S and t above, the process shown in FIG. 3 above can be executed.

In this way, according to this example, the line buffer L]
In order to correct characters stored in line buffer L13 to characters with an angled line, even if a so-called double character correction operation is performed, the data structure in the line buffer L13 is changed to the anglined mode by deleting the corrected characters. Since this is done in the same way as when re-inputting, the consumption of the storage area of the line buffer LB can be minimized. Therefore, the present invention is particularly suitable for devices with a small storage capacity, such as electronic typewriters.

In this example, we have explained the case where a character with a cyander line is corrected by an overlapping character operation, but the present invention is not limited to this. Of course, it can also be applied to the case of combination.

Effects As described above, according to the present invention, when data already stored in the storage means is corrected.

Regardless of the method of correction operation, a control means is provided to make the data structure the only data structure so as not to increase the consumption of the storage area of the storage means, thereby minimizing the consumption of storage area while maintaining excellent operability. A character processing device that can perform the following operations is obtained.

[Brief explanation of drawings]

Figures 1 (2) and (2) are diagrams showing examples of display on the display, respectively, and Figures (2) and (6) are diagrams of data structures in a conventional line buffer corresponding to the display examples in Figure 1. Fig. 3 is a block diagram showing an example of the configuration of the character processing device of the present invention; Figs. FIG. 5 is a flowchart showing an example of the operation of the character processing apparatus of the present invention shown in FIG. Upside down...Keyboard, CPU...Microprocessor. RAM: Random access memory, ROM: Read-only memory. DSC...Display control device, DS...Display device, PTO...Printing control device, PT...Printing device, SB...System bus, aS--Cursor, LB...Line buffer. Patent applicant Canon Co., Ltd. Figure 4 tB Figure 5

Claims (1)

[Claims] 1) An input means for inputting a special character mode instruction code and a character code, and a storage means for storing the character code inputted from the input means, and a predetermined character code is A character processing device characterized by comprising a control means for converting the predetermined character code into an instruction code of the special character code and storing it in the storage means when inputting the predetermined character code as a superimposed character from the input means. 2. The character processing device according to claim 7, wherein the special character mode is an underground character mode.