JPH0664447B2 - Character processor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a character processing device capable of performing character processing operations such as inputting and editing a character string on a display screen.

[Prior Art] Conventionally, a character processing device of this type is generally provided with a buffer memory for storing a display character string having a display area of a display screen for displaying a character string and a storage area corresponding to one to one. Characters at arbitrary positions on the screen are stored in the buffer memory. Since the buffer memory that corresponds to the display screen in a one-to-one manner is used in this way, there are many storage areas that are not used in the buffer memory, and there is the disadvantage that a buffer memory with a large storage capacity is required. It was

Therefore, in order to improve the efficiency of use of the buffer memory and reduce the storage capacity of the buffer memory, a method has been proposed in which the buffer memory is not divided into fixed lengths but used continuously. In the case of this method, since the input character string is stored in the buffer memory as a continuous character string, the unused portion in the buffer memory is reduced and the capacity of the buffer memory can be reduced.

That is, in the latter continuous use method, the space part can be replaced with a special code to improve the use efficiency of the buffer memory, but it is necessary to display the space part which does not exist in the buffer memory in the specific display function. is there. Therefore, the input / edit processing of a new character, which was easy at any position on the display screen in the former one-to-one correspondence buffer memory system, cannot be easily performed in the latter continuous use system. As described above, the latter device has been proposed in order to eliminate the defect of the fixed length in the former device, but a new input processing operation that can be easily performed by the former cannot be performed by the latter. There was a problem.

[Object] An object of the present invention is to solve the above-mentioned drawbacks so that a character string can be input to a position where the character on the left side of the line on which the character string is right aligned is not displayed after the character string is right aligned. The present invention provides a character processing device.

[Examples] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of the configuration of the character processing device of the present invention, in which the CPU is a microprocessor as a central processing unit, performs calculations and logical judgments for character processing, and executes a bus via the bus BUS. It controls each component described later connected to the. The bus BUS is a generic name for an address bus for transferring an address signal, a control bus for transferring a control signal, and a data bus for transferring various data.

The ROM is a read-only memory used as a control memory, and stores in advance various control procedures performed by the microprocessor CPU for various processing such as character input, screen display processing, and edit processing described later. RAM is a writable random access memory and is used when executing the control procedure stored in the read-only memory ROM. It is used for temporary storage of various data from each constituent element and work for microprocessor CPU arithmetic and logic decisions. Used as memory.

KB is a keyboard for inputting characters as an input means,
On this keyboard KB, as shown in Figure 2 below,
Various keys are arranged to give commands to the microprocessor CPU. KBC is a keyboard controller,
The key code conversion process for the input signal from the keyboard KB is executed.

DISK is a disk memory used for storing and recalling created / edited sentences. DB is a buffer memory for creating and editing sentences, and stores the key code input from the keyboard KB as a character code. As shown in FIG. 3 described later, the buffer memory DB of this example has a storage area for 252 characters, and each storage area is handled with a name from DB [0] to DB [251].

DCR is a display control register group, and has a cursor control register, a buffer position display information register group, a cursor position display information register group, and a format information register group, as shown in FIGS. 4 and 5 described later. .

The CRT is a display device using a cathode ray tube, a liquid crystal, a light emitting diode, etc., and displays data such as characters input from the keyboard KB and sentences corrected / changed by the editing process,
In addition, the character processing position designation display by the cursor is performed. DFC
Is a format display controller that drives and controls the display device CRT as a display control means. It controls the positioning of the character string to be displayed on the screen by the cursor and converts it to dot pattern data by referring to the internal character generator to convert characters or symbols. And display control for displaying. The PRT is a printer that prints the text created or edited on the screen on paper.

FIG. 2 shows an arrangement configuration example of the keyboard KB of FIG. Here, KB1 is a group of character keys (hereinafter referred to as general keys) used for inputting ordinary characters, numbers, symbols, etc., for example, an alphabet key, a kana key, etc. having a JIS standard keyboard arrangement. You can enter alphanumeric characters and kana from. The carriage return key CR is this key group K
It shall be included in B1.

KB2 is a group of function keys used to instruct execution of special processing such as cursor movement (hereinafter referred to as special keys).
The key LMSET for setting the left margin, the key RMSET for setting the right margin, the key TAB-SET / CLEAR for setting and releasing the tab, the key CENTER for giving the execution command of the centering of the cursor position, and the key for the cursor position GATHER which gives a command to execute the gathering (right alignment), INSERT key which specifies the insertion of characters, INS which deletes the characters, and DEL which specifies the deletion of characters, and four cursor movement keys "↑, ↓" , ←, → ”. The cursor movement keys indicated by "↑, ↓, ←, →" are used to move the cursor one character at a time in the upward, downward, left, and right directions, respectively.

In this example, it is assumed that a sentence is created by pressing the above key groups KB1 and KB2, and the created sentence already exists in the buffer memory DB for creating and editing the sentence. Since the functions of the above-mentioned keys belonging to the function key group KB2 are generally known, detailed description thereof will be omitted.

FIG. 3 shows a buffer memory DB as the character storage means of FIG.
A configuration example of is shown. This buffer memory DB has a storage area for 252 characters as a memory for storing characters, can store a character code for one character in each area, and assigns address numbers [0] to [251] to each area. To be In particular, DB [0] is a continuous buffer memory that represents the start position and DB [251] represents the end position.

FIG. 4 shows a schematic configuration example of the display control register group DCR in FIG. 1, and FIG. 5 shows a more detailed configuration example. As shown in FIG. 4, the display control register group DCR can be roughly divided into a cursor control register CCR and a display register group DSR. Cursor control register as display cursor position storage means
The CCR value represents the x and y coordinates of the cursor on the screen. As shown in Fig. 5, the x coordinate is stored in the x register CR-X that stores the numerical value from "0" to "39". Represented by that y
Coordinates are y registers C that store numerical values from "0" to "11"
Represented by RY.

As shown in FIG. 4, the display register group DSR includes a buffer position cursor register DSR-POSI, a cursor position display information register group DSR-INF, and a format information register D.
It consists of SR-FORM. The buffer position cursor register DSR-POSI as a memory cursor position storage means is a position corresponding to which position in the buffer memory DB the cursor position in the screen indicated by the above-mentioned registers CR-X and CR-Y corresponds to. Is indicated by the address number assigned to each storage area of the buffer memory DB.

The cursor position display register group DSR-INF is the actual position of the cursor on the screen and the buffer memory for that position.
Judgment means for indicating the amount of deviation on the DB and, as shown in FIG. 5, when the cursor is in a special character string, indicating which position in the character string the cursor is for determining the position with respect to the special character. Registers INF-CR to IN that indicate the status of the position of the cursor on the screen
F-AW and a register INF-PO indicating the status of the cursor at a position that does not exist in the buffer memory DB as the deviation amount storage means
It consists of SI and INF-CPOSI. The register INF-POSI indicates the amount of deviation from the cursor position of the buffer memory DB indicated by the register DSR-POSI.
INF-CP indicates the position of the cursor that does not actually exist in
OSI indicates the amount of deviation between the centering code CN and the left margin. The contents of the above register groups INF-CR to INF-TB are shown in Table 1 below. The numerical value column in the table shows the flag value of each register.

The format information register group DSR-FORM is a group of registers in which format information for screen display is set. As shown in FIG. 5, a register FOM-LM for setting the character position of the left margin and a register of the right margin are set. Register FOM-RM that sets the character position, register FOM-ID that sets the character position of the indent, register FOM-TB [0] to FOM-TB [n] that saves the specified tab position (where n is a positive Integer) and a register TB-LEN indicating the number of characters between the tab positions and the character other than the space before the tab position. In this example, the register FOM-LM is set to "0", the register FOM-RM is set to "39", and the register FOM-ID is set to "0". Register indicating tab position FOM-TB
[0] to FOM-TB [n] are set in order from the tab position of the younger address by the number of designated tabs.

FIG. 6 shows an example in which a sentence input from the keyboard KB is displayed on the screen of the display device CRT shown in FIG. here,
The FML is a format line indicating the format on the screen of the display device CRT, and displays the margin position and the tab position. "L" displayed in the format FML indicates the left margin position, "R" indicates the right margin position,
“T” indicates a tab position, and “•” indicates a character input position. In this example, the left margin is set to "0", the right margin is set to "39", and the tabs are set to three character positions (addresses) of "4", "9", and "14". 12 shown in DL1-DL12 other than this format line FML
The line serves as a display area for displaying text.

Cursor CR Is displayed on the screen. The value of the register CR-X indicating the x coordinate of the cursor CR is "0" at the left margin position and "39" at the right margin position. The value of the register CR-Y indicating the y coordinate of the cursor CR is "0" in the first row DL1 and "11" in the last row DL12. In this way, the cursor CR can be moved by the cursor movement key within the range of the coordinates (0,0) to (39,11). Note that CENT indicates a centering position, CRET indicates a carriage return position, and GATH indicates a gathering position.

FIG. 7 shows an example of the storage state of the buffer memory DB which stores the contents of the display screen shown in FIG. As shown,
The displayed character string is continuously stored in the buffer memory DB, and the special code is stored in the buffer memory DB. It is included.

Is a special code indicating the centering start character. It is displayed at the center position between the left margin and the right margin of the character string between and.

Is a special code that indicates a carriage return, and this code Subsequent strings are displayed from the next line.

Is a special code indicating a tab, and a space character (blank) is displayed on the screen up to a preset backward tab position. Here, the number of space characters displayed on the tab is the number of characters from the cursor position currently displayed to the tab position indicated by the tab position register FOM-TB [n] having the closest value.

Is a special code that indicates the beginning of the character string to be gathered. Display the character string in the range enclosed by and on the screen so as to match the light margin. This gathering is the code in this example. And code The code is a string sandwiched between Is displayed or printed so that the character before the character is set at the position of the light merge. When the buffer memory DB having the contents shown in FIG. 7 is displayed on the display device CRT, it becomes as shown in FIG. 6 or 8.

FIG. 8 shows an example of the state of the display screen of the display device CRT when the cursor CR is to the right of the carriage return position, and FIG. 9 shows the contents of each register of the display control register group DCR at this time. FIG. 10 shows the state of the display screen when a character is input at the position of the cursor CR in FIG.
The figure shows the state of the buffer memory DB at this time. That is, the input character "x" at this time in the buffer memory DB
Is a special code And 8 space codes are inserted between and, and the information behind the space code is sequentially moved backward (see FIG. 7).

FIG. 12 shows an example of the state of the display screen when the cursor CR is at the tab position, and FIG. 13 shows the contents of each register of the display control register group DCR at this time. FIG. 14 shows the state of the display screen when a character is input at the position of the cursor CR in FIG. 12, and FIGS. 15 and 16 show the state of the buffer memory DB at this time. That is, in the buffer memory DB, the code of the input character "X" at this time is a special code together with the space code. Can be replaced with the code It may be inserted between and (see FIG. 7).

FIG. 17 shows an example of the state of the display screen when the cursor CR is at the left or right position of centering, and FIG. 18 shows the state of each register of the display control register group DCR when the cursor is at the left position of centering. Indicates the content. FIG. 19 shows the state of the display screen when characters are input at the left position of centering, and FIG. 20 shows the state of the buffer memory DB at this time. That is, in the buffer memory DB, the code of the input character "A" at this time is replaced with the special code CN together with 14 space codes (see FIG. 7).

FIG. 21 shows the state of the display screen when characters are input at the right position of centering, FIG. 22 shows the contents of each register of the display control register group DCR before this processing, and FIG. The state of the buffer memory DB corresponding to the figure is shown. That is, in the buffer memory DB, the code of the input character "X" at this time is a special code together with 5 space codes. Inserted before and special code Are replaced with 15 space codes (see Fig. 7).

FIG. 24 shows an example of the state of the display screen when the cursor CR is at the left position of gathering, and FIG. 25 shows the contents of each register of the display control register group DCR at this time. 26th
The figure shows the state of the display screen when characters are input at the left position of gathering, and Fig. 27 shows the buffer memory DB at this time.
Indicates the state of. That is, in the buffer memory DB,
The code of the input character "1" at this time is a special code together with 24 space codes. (See FIG. 7).

Next, an operation example of the device of the present invention shown in FIG. 1 will be described with reference to the flowcharts of FIGS. 28 to 38.

FIG. 28 shows the entire processing procedure when one key of the keyboard KB is pressed. By repeating this processing procedure, character processing such as creation / editing of a sentence is performed.

First, in step S1, the input of a key from the keyboard KB is awaited, and if it is determined that any key has been pressed, in the next step S2, the key acquisition process is executed. In this import process, the key code corresponding to the pressed key is extracted and the key code is the general key KB1.
It is determined in step S3 whether or not

When the key code is the key code of the general key KB1, the key setting process of step S4, which will be described in detail later with reference to FIGS. 29 to 36, is executed. In this key set process,
The key code is set in the buffer memory DB according to the situation of the cursor position set on the display screen.

On the other hand, when the key code is the key code of the special key KB2 other than the general key KB1, the process proceeds from step S3 to S5 and the special process corresponding to the key code is executed. For example,
When the entered special key is the centering execution key CENTER or the gathering execution key GATHER, the centering start code is stored in the buffer memory DB. And a code indicating centering end Set, or gathering start code And a code showing the gathering end Set. However, in this example, these special codes Since these are related to the editing process after they have already been set in the buffer memory DB, detailed description of the procedure for setting these special codes in the buffer memory DB will be omitted.

Buffer memory by the above key set processing and special processing
When the contents of the DB are changed, the contents of the buffer memory DB are displayed on the display device CRT by the screen display processing in the next step S6.
And the cursor information check process in step S7 is performed. As a result, the process for pressing one key is completed, the process returns to step S1 again, and the next key input is awaited.

Next, the key setting process in step S4 described above will be described in detail with reference to the flowcharts in FIGS. 29 to 36.

FIG. 29 shows the whole key set process. In this process,
The determination means for determining the position of the cursor based on the information in the register group DSR-INF is determined as follows. First, in step S10, the cursor CR when key set processing is specified
It is determined whether or not the position on the display screen is at a special position described later. The position of the cursor CR on the display screen is determined by referring to the flag value (numerical value) set in each register of the cursor position display information register group (hereinafter referred to as the cursor position information table) DSR-INF. This cursor position information table is updated by the screen control process that performs the cursor movement process in step S7 described above, and the correct cursor position information is always set according to the cursor movement process, so the position of the cursor on the screen is Can be correctly identified.

When it is determined that the cursor is at the special position, step
The key setting process at the special position of S11 is executed, and the process returns to the main routine of FIG. If the cursor is located at any other general position, the key setting process at the general position in step S12 is executed and the process returns to the main routine of FIG. In the key setting process at this general position, the character code of the input character is set at the current cursor position in the buffer memory DB indicated by the buffer position cursor register (hereinafter referred to as buffer cursor) DSR-POSI.

FIG. 30 shows the whole key setting process at the special position in the above step S11. Here, the special position means the right position of the carriage return, the position in the centering line, the tab position, and the position in the gathering line. This special position information is in the cursor position information table.
Corresponding carriage position information register INF-C in DSR-INF
R, the centering position information register INF-CN, the tab position information register INF-TB, and the gathering position information register INF-GH are set respectively, so the flag values (see Table 1 above) of these registers are set. By sequentially referring to it, the position information of the current cursor position can be known. Further, since the cursor to the special position is not set at two or more places at the same time, the key setting process to be processed next is uniquely determined.

Therefore, first in step S20, it is determined whether or not the cursor is at the right position of the carriage return by the flag of the carriage position information register INF-CR, and if the determination is affirmative, the key setting process at the carriage return right position of step S21 is executed. And returns to the main routine. Step
When the determination in S20 is negative, it is determined in step S22 whether or not the cursor is in the centering line by the flag of the centering position information register INF-CN. When the determination is affirmative, the keying process for centering in step S23 is executed. And returns to the main routine.

When the determination in step S22 is negative, in step S24 it is determined whether or not the cursor is at the tab position by the flag of the tab position information register INF-TB. When the determination is positive, the key setting process at the tab position in step S25 is performed. Execute and return to the main routine. When the determination in step S24 is negative, it is determined in step S26 whether or not the cursor is on the gathering line.
The determination is made by the flag of INF-GH, and when the determination is affirmative, the key setting process in the gathering of step S27 is executed, and the process returns to the main routine. In this way, the position of the cursor is sequentially determined, and the key setting process corresponding to the situation of each position is executed.

FIG. 31 shows the detailed procedure of the carriage return right position key setting process in step S21 described above. cursor
FIG. 8 shows an example of the display screen when the CR has moved to the right beyond the carriage return code position, and the cursor CR at this time is in the 9th column of the second line. Also, since the carriage return 1 is in the column eye,
As shown in the figure, "1" is set in the carriage return information INF-CR in the cursor position information table DSR-INF, and the cursor position "9" is set in the buffer cursor DSR-POSI.
Is set. Further, the information INF-POSI indicating the shift amount indicates the shift amount from the carriage return to the cursor position. “8” is set. FIG. 10 shows the screen when the character “X” is entered at the cursor position in this state. The state in the buffer memory DB at this time is as shown in FIG. 11 by the key setting process of FIG. 31. Turns into. That is, the buffer memory before entering the letter "X"
Compared with FIG. 7 showing the state of DB, address DB [8]
Carriage return code And carriage return code of address DB [9] It can be seen that eight space codes and the code of the letter "X" were inserted between and. In this way, if the buffer memory DB is in the state shown in FIG. 11, even after the carriage return, it is possible to display the characters on the display screen as if the characters were freely input.

Therefore, in this key set processing procedure, first, step S3
The character string after the position of the buffer memory DB designated by the buffer cursor DSR-POSI at 0 is moved backward by one character, and the code of the character input from the keyboard KB at the next step S31 is designated by the buffer cursor DSR-POSI. After setting the position of the buffer memory DB that has been set, and then repeatedly performing the processing of step S30 and the setting of the space code for the number of times set in the information INF-POSI indicating the shift amount in step S32, the main routine Return to.

The above procedure will be described more specifically with reference to FIGS. 7 to 11. The address DB [9] of the buffer memory DB will be described below.
Subsequent data is shifted backward by one character by step S30, and the code of the input character "X" is set in the address DB [9] by step S31. Further, step S32
Then, as in step S30, the data after the address DB [9] is shifted backward character by character, and the space code is set in the address DB [9]. When the movement of the buffer data and the setting of the space code are repeated by the shift amount "8" set in the shift information INF-POSI, the buffer memory DB becomes as shown in FIG. After the above processing,
Move the cursor to the new carriage return position DB [18]. As described above, according to this key setting process, even if there is no data or the like in the buffer memory DB after the carriage return, the input character can be set as if it exists.

FIG. 32 shows the detailed procedure of the tab position key setting process in step S25 of FIG. Here, the tab position is
The position indicated by "t" in the format line FML in Fig. 12 is the tab code in the buffer memory DB. Displays up to the tab position of t as a space on the screen. Like this, the internal code Handles as a space code on the screen display that fills up to the position of t, but in the buffer memory DB,
As shown in the figure, a tab code is placed at the position of one address DB [10]. Only one is stored.

If the cursor CR exists at the screen position as shown in FIG. 12, the buffer cursor DSR-PO at this time is displayed.
SI is a tab code Refers to the position. The position of the cursor CR at this time is the tab code. The deviation amount is set in the deviation information INF-POSI. That is, as shown in FIG. 13, the tab code is added to the buffer cursor DSR-POSI at this time. "10" pointing to the position DB [10] of is set and information INF-TB
Is set to "1" indicating that it is the tab position, and the position of the cursor CR is the buffer code DSR-POSI tab code in the shift information INF-POSI. "1" is set to indicate that the position is shifted by "1". Also, the tab code corresponding to the information TB-LEN Character code following and tab code following The number of space codes existing between the character codes immediately before is set to indicate the amount of space between tab positions. 12th
Since there are four spaces in the case of the figure, "4" is set in the information TB-LEN.

When the character "X" is entered at the cursor position in the state shown in Fig. 12, the character "X" is displayed at the cursor position, and the cursor CR moves one position to the right, resulting in the state shown in Fig. 14. . The state of the buffer memory DB at this time changes as shown in FIG. 15 or FIG. In the case of Fig. 15, tab code After changing all to space code, set the input character code at the cursor position. On the other hand, in the case of FIG. 16,
Tab code up to character input position Only the number of space characters that has a space code,
Input character is tab code Set before. In the tab position key set processing of FIG. 32, a processing procedure for performing the processing as shown in FIG. 16 is shown.

When the tab position key setting process of FIG. 32 is started, "1" indicating that the cursor is at the tab position is set in the information INF-TB in the cursor position information table DSR-INF. Therefore, first in step S40,
The value obtained by subtracting "-1" from the value set in the information TB-LEN and the tab code It is determined whether or not the value matches the value of the information INF-POSI indicating the amount of cursor position deviation from. When matching, tab code When the input character is set at the position of, and tab code does not match This is when the cursor is pointing to a tab position other than.

In step S40, when affirmative agreement is given,
Go to step S41, tab code pointed to by buffer cursor DSR-POSI Is replaced with the input character input from the keyboard KB. Next, move to step S44 and tab code. Information indicating the amount of deviation from the number of times set in INF-POSI, the process of moving the character string backward from the buffer memory DB position pointed to by the buffer cursor DSR-POSI one character at a time and the space code buffer Cursor DSR-POSI
After repeatedly performing the process of setting the position in the buffer memory DB pointed to by, the process returns to the main routine.

On the other hand, if a negative decision is made in step S40 that they do not match, the operation proceeds to step S42, in which the character string after the position of the buffer memory DB pointed by the buffer cursor DSR-POSI is moved backward by one character, and the next step In S43, the input character input from the keyboard KB is set at the position of the buffer memory DB pointed by the buffer cursor DSR-POSI. Next, the process proceeds to step S44, the same process as described above is performed, and the process returns to the main routine. By the above key setting process, the character input at the tab position can be performed in the same manner as the normal character position.

33 to 35 show the centering key setting processing procedure in step S23 of FIG. CR (1) in Fig. 17
Indicates the position of the cursor on the left side of the centering line, and CR (2) indicates the position of the cursor on the right side of the centering line. Also, FIG. 18 shows the contents of the registers when the cursor is at the left position CR (1) of the centering line. The centering position information INF-CN at this time indicates that the cursor is at the left position of the centering line. “2” is set (see Table 1). The buffer cursor DSR-POSI, which indicates the cursor position inside the buffer, is the centering code. Pointing to position "0". However, the cursor position on the display is not at the position of "" indicating the centering code as shown in Fig. 17, but it is five characters from the cursor position on the display to the position of "" indicating the start of centering. Since there is a shift amount between the actual cursor display position and the internal cursor position, "5" indicating the shift amount from the centering code to the cursor is set in the shift amount information INF-POSI. . Furthermore, in the information INF-CPOSI indicating the centering start position, the amount of space "14" on the display screen from the display position of "L" indicating the left margin to before the first character of the centering position "" is set. There is.

When the character "A" is input to the cursor position CR (1) in the state of FIG. 17, the screen state of FIG. 19 is obtained. The state of the buffer memory DB at this time changes as shown in FIG. 20 by the key setting process of FIG. In this way, the input character "A" can be set to the left position of the centering character string without changing the display position of the character string "FREEBIE" that has already been centered.

This centering key setting process will be described with reference to the flowcharts of FIGS. 33 and 34. The input characters are stored in the memory as shown in FIGS. 33, 34 and 35 as the storage control means described below. FIG. 33 shows the whole centering key set processing procedure in step S23 of FIG. First, in step S50, it is determined whether or not the cursor is at the left position of centering by the value of the information INF-CN. When the determination is affirmative, the centering left position key setting process of step S51 is executed, and when the determination is negative, the step is determined. The centering right position key setting process of S52 is executed and the process returns to the main routine. When the cursor is located at the left position in the centering line, "2" is set in the information INF-CN, so that the determination in step S50 can be easily performed.

FIG. 34 shows the details of the centering left position key setting process in step S51 of FIG. Now, assuming that the contents of the register are in the state shown in FIG. 18, first, in step S60, the buffer cursor DSR-POSI is set to the centering code. The centering code of this position because it points to position "0" To a space code. Next, in step S61, the character strings set in the buffer memory DB after "0" indicated by the buffer cursor DSR-POSI are displayed the number of times of the value "5" set in the deviation amount information INF-POSI. The process of shifting one character backward and setting the space code at the position of the buffer memory DB pointed by the buffer cursor DSR-POSI is repeated.

Next, in step S62, similarly, the buffer cursor D
After shifting the character string after the position indicated by SR-POSI by one character, the code "A" of the input character entered from the keyboard KB
Is set to the position “0” pointed by the buffer cursor DSR-POSI. Further, in step S63, the character string subsequent to the buffer cursor DSR-POSI is shifted by one character by one character by the number of times the value "8" in the register CR-X indicating the number of characters from the cursor position to the left margin position, and The process of setting the space code to the position pointed to by the buffer cursor DSR-POSI is repeated, and the process returns to the main routine. By executing the above key setting process, the buffer memory DB is changed as shown in FIG. 20 and displayed as shown in FIG.

Next, the key setting process when the cursor is at the right position of the center rig line will be described. FIG. 21 shows the display state when the character “X” is entered at the cursor position CR (2) at the right position of the centering line in FIG. 17, and the character string “FREEBIE” that was centered at this time is displayed. The display position does not change, and the input character "X" is displayed at the centering right position. The contents of each register before executing this key set processing are shown in Fig. 22. The buffer cursor DSR-POSI indicating the internal cursor position shows the carriage return code at the end of the centering line. Is set to "8", and the centering position information INF-CN is set to "3" indicating that the cursor is located on the right side of the centering line (see Table 1).
Also, the carriage return code at the cursor position on the display Deviation amount "4" is set in deviation amount information INF-POSI,
Centering code The amount of deviation "14" between the left margin and the left margin is set in the information INF-CPOSI. The centering right position key set process is performed using the above cursor position information. FIG. 35 shows details of the centering right position key setting process in step S52 of FIG. Now, assuming that the contents of the register are in the state of FIG. 22 described above, first, in step S70,
Buffer cursor DSR-POSI indicating the position of the internal cursor is the carriage return code of the centering line Since this shows the position "8" of this buffer cursor DS
After moving the character string in the buffer memory DB after the position pointed to by R-POSI by one character, move it to the buffer cursor.
Set the character input from the keyboard KB to the position pointed to by DSR-POSI. Next, proceeding to step S71, the carriage return code CR character, the cursor position on the display, and the carriage return code The character at the position pointed to by the buffer cursor DSR-POSI is moved back one character at a time in order to move by 5 characters based on the number of times of the value "4" of INF-POSI indicating the amount of deviation from the position of
And the process of setting the space code at the position pointed by the buffer cursor DSR-POSI is repeated.

Then, in step S72, the buffer cursor DSR-P
Centering code from the position pointed by OSI to the front The centering code that executes the process to find out where in the buffer memory DB is Set position "0" of as the value of the new buffer cursor DSR-POSI. Next, in step S73, at the new position "0" pointed to by the buffer cursor DSR-POSI, the buffer cursor DSR-POSI has a total of 15 times the centering code CN and the number of times "14" set in the deviation information INF-CPOSI. After repeating the process of setting the space code at the pointed position and shifting the character string following the buffer cursor DSR-POSI backward by one character, the process returns to the main routine. Code by the processing of this step S73 Replaces space.

By the above procedure, the character "X" is set in the buffer memory DB as shown in FIG. Thus, the character input at the right position or the right position of the centering line can be performed without changing the display position of the centered character string. However, once these input processes have been performed, the centering code Does not exist in the buffer memory DB, the key setting process similar to the above for the same row is not executed again.

Next, the character input processing at the left position of gathering will be described. Fig. 24: Cursor CR at the left position of gathering
An example of a screen when there is is shown. Figure 25 shows the contents of each register at this time. “2” indicating the left position of gathering is set in the information INF-GH (see Table 1), and the gathering code of cursor CR The amount of deviation from "6" is set in the information INF-POSI.

FIG. 36 shows details of the gathering key setting process in step S27 of FIG. Now, assuming that the contents of the register are as shown in FIG. 25, first, step S80
, The gathering code at position "185" pointed to by the buffer cursor DSR-POSI Into the space code. Next, in step S81, the character string after the buffer cursor DSR-POSI is moved backward by one character and the buffer cursor DSR-POSI is pointed by "6" times of the information INF-POSI. Repeat the process to set the space code at the position. Then, in step S82, the character string subsequent to the one pointed by the buffer cursor DSR-POSI is further shifted, and the character "1" input from the keyboard KB is moved to the position pointed by the buffer cursor DSR-POSI. Set (see Figure 26).

Further, the process proceeds to step S83, the character string following the buffer cursor DSR-POSI is shifted backward by "17" times in the register CR-X, and the space is moved to the position indicated by the buffer cursor DSR-POSI. After repeating the code setting process, the process returns to the main routine.

By the above key setting processing, the display state on the display screen becomes as shown in FIG. 26, and the buffer memory DB becomes as shown in FIG. Like this, gathering code Since the is replaced with a space code, it is possible to input characters in a gathering line without changing the display position of the gathering character string.

FIG. 37 shows details of the screen display process shown at step S6 in FIG. FIG. 38 shows the details of the cursor information checking process shown at step S7 in FIG. The screen display process and the cursor information check process are performed by applying a generally known technique and are not directly related to the present invention, and thus detailed description thereof will be omitted.

In this example, in the key setting process on the special code line, the shift amount between the screen position of the cursor and the buffer memory position of the special code line is converted into the space code and set in the buffer memory. A special code that means a plurality of spaces can be used instead of the space code. When such a special code is used, the amount to be set in the buffer memory is smaller than that when the space code is used, so that there is an advantage that the buffer memory can be used more effectively.

[Effects] As described above, according to the present invention, in a character processing device that allows normal display on a display without increasing the storage capacity of a storage unit that stores a character, a character string is displayed on the right side. After distorting, on the line where the character string is displayed,
It is possible to realize a character processing device in which a new character can be input at a position where a character is not displayed, which has good operability and requires a small storage capacity.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of the configuration of the character processing device of the present invention, FIG. 2 is an arrangement configuration diagram showing a detailed example of the keyboard KB of FIG. 1, and FIG. 3 is an example of the buffer memory DB of FIG. 4 is a schematic configuration diagram showing an example of the display control register group DCR of FIG. 1, FIG. 5 is a configuration diagram showing details thereof, FIG. 6, FIG. 8, FIG. 12, FIG. 17 and 24 are plan views each showing an example of the display mode of the display screen of the display device CRT of FIG. 1 before character input, and FIG. 7 is the buffer memory DB of FIG. 1 corresponding to those display screens. FIG. 9, FIG. 13, FIG. 18, FIG. 22, and FIG. 25 are explanatory views showing the contents of the display register group of FIG. 1 corresponding to the above-mentioned display screens, respectively. FIG. 10, FIG. 14, FIG. 19, FIG. 21 and FIG. 26 show the display screens of the display device CRT of FIG. An explanatory view showing an example, FIG. 11, FIG. 15, FIG. 16, FIG. 20, FIG. 23, and FIG. 27 are explanatory views showing the contents of the buffer memory DB of FIG. 28 to 38 are flowcharts showing an example of the operation of the device of the present invention shown in FIG. CPU ... Microprocessor, ROM ... Read-only memory, RAM ... Random access memory, KBC ... Keyboard controller, KB ... Keyboard, DISK ... Disk memory, PRT ... Printer, DB ... Buffer memory, DCR ... … Display control register group, DFC …… Format display controller, CRT …… Display device, KB1 …… General key, KB2 …… Special key, CCR …… Cursor control register, DSR-POSI …… Buffer position cursor register (buffer cursor ), DSR-INF …… Cursor position display information register group (table), DSR-FORM …… Format information register group

Continuation of the front page (56) References "Hitachi Japanese word processor 2 way keyboard type operation manual for beginners" 3rd edition (Sho 57-9-10), p. 43 "Hitachi Japanese Word Processor 2-Way Keyboard Type Operation Manual Supplement" Second Edition (Sho 57-9-10), p. 17

Claims (1)

[Claims] 1. Input means for inputting character information and a right-justification command; character storage means for storing the character information and right-justification command information inputted from the input means; and character information in the character storage means on a display means. Display control means for displaying on the screen of the display means, a display cursor position storage means for storing the position of the cursor displayed on the screen of the display means, and the display cursor position storage means for storing the position of the cursor on the screen where the cursor is positioned. A memory cursor position storage means for storing storage position information on the character storage means, and the cursor is located on the left side of the display position of the character information which is the target of the right justification instruction, and the character information is not displayed. When it is positioned at an undisplayed position, the storage position information of the character information which is the target of the right justification instruction stored in the memory cursor position storage means. A displacement amount storage unit that stores information indicating a displacement amount represented by the following, and the cursor is positioned at the undisplayed position of the line where the character string that is the target of the right justification instruction is displayed. New character information input from the input means by moving the character stored in the character storage means based on the storage position information of the memory cursor position storage means and the displacement amount of the displacement amount storage means Is stored in the character storage means, and the character storage control means deletes the right-justified command in the character storage means.