JPH04280355A - document processing device - 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]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document processing apparatus, and more particularly to a document processing apparatus capable of executing an undo function.

0002

[Background Art] Conventionally, in this type of document processing device, deleted sentences are restored after each deletion function such as character deletion, word deletion, line deletion, deletion of a specified range after specifying a range, etc. There is an undo (hereinafter referred to as UNDO) function processing. Furthermore, you can use the UNDO function to insert characters and 1
A device has also been proposed that restores the state of the text before the most recently executed key input or function was executed.

0003

[Problem to be Solved by the Invention] However, in the conventional example, the above-mentioned functions for deleting and inserting sentences at once, such as the search and replace function and the correct word replacement function in the spelling function, are not available. There was no UNDO function. Furthermore, in order to execute the UNDO function for the above-mentioned function, it is necessary to secure in advance a special storage area for restoring text in addition to the area for storing text information, resulting in a problem of increased costs.

The present invention has been made to solve the above problems, and for each dividing point where the text information storage area is divided into two, a dividing point is set for returning to the text before execution after each function is executed. By automatically updating the settings when each function is executed, the UNDO function can also be used for functions that delete and insert sentences at once, such as the search and replace function and the correct word replacement function in the spelling function. It can be executed and
It is an object of the present invention to provide a document processing device capable of returning text information restored by an UNDO function to a state in which text deletion and insertion have been executed.

[0005]

[Means for Solving the Problems] A document processing device according to the present invention includes an instructing means for instructing to start a predetermined editing of text information or returning to the text, and storing the text in a memory medium based on the editing start instruction by the instructing means. A region dividing means divides the region, and a plurality of pieces of division position information are sequentially set in the divided regions based on an editing instruction by the instruction means, and a plurality of division position information is set in the divided regions based on a text return instruction from the instruction means. and updating means for updating the setting state of each division position information.

The updating means also includes a first division information setting means for writing and setting first and second division position information of each divided area divided by the area dividing means into the divided area, and a first division information setting means for writing and setting the first and second division position information of each divided area divided by the area dividing means, and a predetermined information set by the instruction means. The first page being set in response to the instruction to start editing
, a second division information setting means for writing and setting the second division position information as third and fourth division position information in the divided area, respectively, and a third division information setting means for writing and setting the second division position information as third and fourth division position information, respectively, in the divided area,
, a return means for returning the fourth division position information to the first and second division position information within the division area.

[0007] Furthermore, the third and fourth division position information set by the second division information setting means based on the text restoration instruction by the instruction means are combined with the corresponding first and second division position information and the respective division areas. A third division information setting means is provided to exchangeably set the division information.

[0008]

[Operation] In the present invention, when the area dividing means divides the text storage area of the memory medium based on the editing start instruction from the instruction means, the updating means divides the text storage area into a plurality of divided areas based on the editing instruction from the instruction means. At the same time, the setting status of each division position information set in the divided area is updated based on the text restoration instruction by the instruction means, and when the text restoration instruction is issued, the deleted previous text information is updated. It is possible to restore it.

[0009]Furthermore, the first division position information setting means writes and sets the first and second division position information of each divided area divided by the area division means into the divided area based on the editing instruction from the instruction means. The second division information setting means selects the first division information that is being set in response to a predetermined editing start instruction from the instruction means.
The second division position information is written and set in the division area as third and fourth division position information, respectively, and the return information is held in the document storage area. Then, in response to the text restoration instruction from the instruction means, the restoring means restores the third and fourth division position information to the first and second division position information in the divided area, thereby restoring the deleted text information. make it possible.

Furthermore, based on the text restoration instruction by the instruction means, the third division information setting means sets the third and fourth division position information set by the second division information setting means to the corresponding first and second division position information, respectively. After the deleted text information is restored, it is possible to return the deleted text information to the deleted state.

[0011]

[Embodiment] FIG. 1 is a perspective view showing the external appearance of a document processing device showing an embodiment of the present invention, and (a) shows a state in which the keyboard section 1 is rotated to open the display 6 side. This corresponds to a state in which document processing can be started, and (b) corresponds to a stored state in which the keyboard section 1 is rotated to protect the display 6 surface.

In the figure, a keyboard section 1 has a group of keys 2 arranged thereon, such as keys for inputting characters such as letters and numbers, and keys such as controls, and is rotated around a hinge 3 when not in use. As a result, it is constructed so that it can be folded as shown in FIG. 1(b). Reference numeral 4 denotes a paper feed tray for feeding sheet-like recording media to the printer section 8 inside the device, and when not in use, it is stored covering the printer section 8 as shown in Fig. 1(b). . 5 is a knob for manually setting and ejecting the storage medium, 6 is a knob for manually setting and ejecting the storage medium, and 6 is for adjusting the input document etc. by changing the font, size, etc.
A bit matrix type display that can display character modification information such as underlined and bold face characters in the same manner as printed matter; 7 is a handle for transporting the main body;
Reference numeral 8 denotes a printer section for printing input text, and 9 a floppy disk device for storing input text information and the like.

FIG. 2 is a system block diagram illustrating the control configuration of the document processing apparatus shown in FIG. 1, in which the same components as in FIG. 1 are given the same reference numerals.

In the figure, 100 is a CPU, ROM1
The processing program stored in 02 (FIGS. 6 to 8, which will be described later)
Each device connected to the bus 108 is controlled based on the control procedures shown in the flowchart shown in FIG. Note that 100a is an updating means, and 100b is an area dividing means. A RAM 103 has a predetermined storage capacity and temporarily stores work data, document data, etc., which will be described later. The bus 108 is composed of an address bus for transferring address signals, a control bus for transferring control signals, a data bus for transferring various data, and the like.

In the document processing apparatus configured as described above, the area dividing means 100b is an instructing means (key in this embodiment).
When the text storage area of the memory medium (in this embodiment, the text storage area 111 in the RAM 103 described later) is divided based on an editing start instruction from the board unit 1), the updating unit 100
a sequentially sets a plurality of division position information within the division area divided based on the editing instruction by the instruction means,
The setting state of each division position information set in a divided area is updated based on a text restoration instruction by an instruction means, and it is possible to restore deleted previous text information when a text restoration instruction is given.

Furthermore, based on the editing instruction from the instruction means, the first division position information setting means 21 writes the first and second division position information of each divided area divided by the area division means into the divided area. and the second division information setting means 2
2 writes and sets the first and second division position information being set in the division area as third and fourth division position information, respectively, in response to a predetermined editing start instruction from the instruction means, and sets the information in the document storage area. to retain return information. Then, in response to the text restoration instruction from the instruction means, the restoring means 23 restores the third and fourth division position information to the first and second division position information in the divided area, and restores the deleted text information. make it possible to

Further, based on the text restoration instruction from the instruction means, the third division information setting means 24 converts the third and fourth division position information set by the second division information setting means 22 to the corresponding first and fourth division information, respectively. The second division position information is set to be exchanged within each division area, and after restoring the deleted text information, the deleted text information is further restored to the deleted state.

[0018] In this embodiment, each of the above means 100a,
Although the case where 100b, 21 to 24 are configured as functional means of the CPU 100 has been shown, the same effect can be obtained even if each means is configured as an independent means.

FIG. 3 is a plan view showing the arrangement of each key on the keyboard section 1 shown in FIG. The keys are arranged in a known key arrangement including a shift key and a group of control keys.

In the figure, reference numeral 214 denotes a previous screen key, which is pressed when requesting the previous screen for the current screen displayed on the display (LCD) 6. Reference numeral 217 is a next screen key, which is pressed when requesting the next screen for the current screen displayed on the display (LCD) 6. 216 is a key used to move the cursor to the beginning of the document file being processed and display the beginning part; 220 is a group of cursor control keys, including a cursor instruction key 220U; (Upward direction), 220D (Downward direction), 220L (Left direction), 2
Consists of 20R (right indication). 228 is a code key, and this code key 228 and numeric key ``5''
'' at the same time, a search and replace screen (see FIG. 5(b)) is displayed, prompting execution of the search and replace function. 229 is undo (UN
DO) The instruction key is pressed to restore the deleted text to the text before insertion or deletion.

FIG. 4 is a schematic diagram illustrating the data structure of the RAM 103 shown in FIG.

In the figure, reference numeral 111 is a text information storage area, and document data related to the current process, such as a document currently being input or a document read from a floppy disk, is developed in this area. 121 indicates the first half of the area that is used after being divided into two, and 122 indicates the second half of the area that is used after being divided into two. 123 indicates an empty area of the area which is divided into two and used. 12
4 indicates the first division point indicated by the contents of the first division point position information area 113 in the text information storage area 111, and 125 indicates the second division point position information area 114 in the text information storage area, which will be described later.
The second dividing point indicated by the contents of is shown. Reference numeral 112 denotes a cursor position information area within the text information storage area, which stores position information where the character indicated by the cursor position in the text information storage area 111 is stored. Reference numeral 115 denotes a third division point position information area within the text information storage area 111, which will be described later, in which third division point position information is stored. Reference numeral 116 denotes a fourth division point position information area in the text information storage area 111, which will be described later, in which fourth division point position information is stored.

The undo processing operation in the document processing apparatus according to the present invention will be explained below with reference to FIGS. 5 to 8. [Example of undo processing after search and replace function processing] FIG. 5 is a schematic diagram showing the progress of undo processing in the document processing apparatus according to the present invention.

In the figure, (a) shows the display state before starting the search and replace function, 61 shows the cursor,
Reference numeral 62 indicates a cursor indicating the position of the specified word to be searched. (b) is the search and replace function specification screen, and 63 is the search and replay function specification screen overlaid on the normal display.
On the screen for the search function, there is a section 63A for the operator to input a word related to the search, a section 63B for inputting the word for replacement, and a section 63B for inputting the word related to the search, and a section 63B for inputting the word related to the search. It is composed of a part 63C for specifying whether to perform a step or for each word, and a part 63D for specifying a forward or backward direction. It should be noted that the operator can enter input into the portions 63A and 63B using character keys, etc., and input into the portions 63C and 63D.
You can designate it using the cursor instruction keys 220L and 220R.

FIGS. 6 to 8 are flowcharts showing an example of an undo processing procedure in the document processing apparatus according to the present invention. Note that (1) to (41) indicate steps.

When the power is turned on, first, the position information of the first dividing point and the second dividing point that divides the text information storage area 111 into two is stored in the first dividing point position information area 113 in the text information storage area 111. and second division point position information area 11
4 (1), and stores the position of the character indicated by the cursor in the cursor position information area 112 within the text information storage area 111. Next, the contents of the first dividing point position information area 113 are stored in the third dividing point position information area 115, and the contents of the second dividing point position information area 114 are stored in the fourth dividing point position information area 1.
16 (2), and waits for a key input from the keyboard section 1 (3). Here, if any key input is made, the input key is determined (4) and a key (for example, CODE key) for executing search and replace is selected.
228 and the numeric key "5" at the same time), the processes from step (7) onwards are performed sequentially, and when the undo instruction key 229 is pressed to execute the undo function. , perform the processing from step (5) onwards.

On the other hand, if a key input other than the above is made, the processing from step (17) shown in FIG. 7 is executed.

Therefore, if the key determined in step (4) is a key for executing search and replace (for example, simultaneous pressing of CODE key 228 and numeric key "5") If it is determined that there is a search and replace word, input the search direction, specify whether to search and replace for all words or for each word (7). )
. Hereinafter, in this embodiment, the operation will be described assuming that a sentence as shown in FIG. 5(a) is displayed on the display 6.

When the input is completed in this way, a search is started from the current cursor position in the specified direction for the word input in step (7) (8). if,
If the input word cannot be detected, proceed to step (3)
The screen returns to the screen and waits for key input. On the other hand, if the input word can be detected, the process proceeds to step (9). For example, as shown in Figure 5(b), the search word "ABC" and the replacement word "DEF" are searched and replaced one by one in the forward direction. For example, if an instruction is input to perform
Since the word "ABC" exists as shown in Sol 62,
Move the cursor to the word searched in step (9). In FIG. 5(a), cursor 61 moves to cursor 62. In FIG. In step (10), the text information storage area is divided into two at the cursor position, as shown in FIG. 9, for example.

FIG. 9 is a schematic diagram showing the transition of the UNDO function processing state after the search and replace function in the document processing apparatus according to the present invention.

In the figure, (a) shows the setting state by the second division information setting means, and is an example in which the text information storage area 111 is divided into two so that the searched word "ABC" is placed at the end of the first half area. 701 indicates a space code stored in the text information storage area 111. 702 and 703 are the first dividing point position information area 11, respectively.
3. The corresponding positions stored in the second division point position information area 114 are shown. (b) shows the setting state by the second division information setting means, 711 shows the first division point position information, 704 shows the third division point position information, 705 shows the second division point position information, 706 indicates fourth division point position information. (c) shows the text information storage area 111, and positions 708 indicate the first division point and the third division point.

The positional information of the first dividing point of the first half area divided into two in step (11) is stored in the first dividing point position information area 113, and the positional information of the second dividing point of the latter half area is stored as the second dividing point position information. It is stored in area 114. Next, the same process as step (2) above is executed, and for example, the corresponding position 702 shown in FIG. Store (12).

Next, in order to delete the searched word, the first division point position information area 11 is moved so as not to include the search word placed at the end of the first half area of the text information storage area 111.
Update the contents of 3 (13). For example, the corresponding position 711 shown in FIG. 9(b) is set as a new first dividing point, and the position is stored in the first dividing point position information area 113.

Next, the replacement word is stored in the text information storage area 111 so as to be located in front of the divided latter half area (14), and the first character of the replacement word in which the second division point is stored is stored. As shown, the second division point position information area 11
4 is updated (15). For example, the corresponding position 705 in FIG. 9(b) is set as a new second division point, and the position is stored in the second division point position information area 114. Next, the text is displayed as shown in FIG.
6).

On the other hand, if the key determined in step (4) is a key for activating the UNDO function, the UNDO function is executed in step (5). Note that the step (
5) may be replaced with the process shown in FIG. 8, which will be described later.

First, the contents of the third dividing point position information area 115 are stored in the first dividing point position information area 113, and the contents of the fourth dividing point position information area 116 are stored in the second dividing point position information area 114. (5). For example, in the text information storage area 111 of FIG. 9(c), position 708 indicates the first division point and third division point, and position 710 indicates the second division point and fourth division point. Note that positions 707 and 709 in FIG. 9(c) are positions that do not correspond to any dividing point. Next, after executing the UNDO function similarly to step (16), the text shown in FIG. 5(a) is displayed (6).

As described above, in the example of the undo process after the search and replace function, even if the function deletes and inserts sentences all at once, returning to the original sentence is possible only in areas other than the text information area. is executed without having a special area. In addition,
In this example, the word to be deleted is placed in the first half area, and the word to be inserted is placed in the second half area, but conversely, the word to be deleted is placed in the second half area, and the word to be inserted is placed in the first half area,
It is also possible to easily input characters after the replacement word after executing the search and replace function without unnecessary division of the text information area.

Furthermore, in this embodiment, it is not limited to the search and replace function, but may also be configured to be executed by a collection function of the spelling function to replace with the correct word, a function of the thesaurus function to replace with synonyms, etc. good. [Example of UNDO function processing after character input] On the other hand, the key determination in step (4) in FIG.
(other than the O key), the process from step (17) shown in FIG. 7 is activated.

FIG. 10 is a schematic diagram showing the transition of the UNDO function processing state after character input in the document processing apparatus according to the present invention, and the same parts as in FIGS. 2 and 4 are given the same reference numerals.

In the figure, (a) shows an example of text display before character input, (b) shows an example of dividing the text information storage area 111, 801 shows the cursor position where character input is performed, and 802 803 indicates the set first and third division points, and 803 indicates the set second and fourth division points. (c) shows an example of a displayed document after characters are input, (d) shows an example of dividing the text information storage area 111, 805 shows the new first dividing point, 804 shows the third dividing point, and 806 shows the new dividing point. The second dividing point and the fourth dividing point are shown. (e) shows an example of the displayed text after executing the UNDO function, and (f) shows the text information storage area 1.
11 division examples are shown, 807 indicates the first division point and third division point updated by the UNDO function, 809 indicates the second division point and fourth division point, and 808 indicates other than the division point.

On the other hand, if the key determined in step (4) is a character input key, the text information storage area is divided into two at the cursor position, as shown in FIG.
). Next, the position information of the first division point of the first half area divided into two is stored in the first division point position information area 113, and the position information of the second division point of the second half area is stored in the second division point position information area 114 ( 18). For example, the first dividing point position information 802 shown in FIG.
6 (19). Next, the text information storage area 11 is placed so that the input characters are located behind the divided first half area.
1 (20), and the contents of the first dividing point position information area 113 are updated to indicate the position of the input character where the first dividing point is stored (21). As a result, the position of the dividing point 805 shown in FIG. 10(d) is set as a new first dividing point, and the position is stored in the first dividing point position information area 113. Next, display the text after inputting the characters (22), and step (3)
Return to

[0042] Thereafter, if it is determined in step (4) that the UNDO key has been input, the UND key is input in steps (5) and (6).
When the O function process is executed, the text after the UNDO function process is displayed on the display 6 as shown in FIG. 10(e).

As described above, returning to the original text after character insertion is performed by changing only the dividing point of the divided first half area. In this embodiment, only the first half area is changed when inserting a character, but even if only the second half area is changed, the UNDO function is executed in the same way for inserting a character. Furthermore, if the UNDO function is executed by using the inserted characters as information of a plurality of characters and arranging the information by appropriately dividing the information into the first half area and the second half area, it becomes possible to apply it more widely. [Example of UNDO function processing after deleting the character at the cursor position] FIG. 11 is a schematic diagram showing the state transition of the UNDO function process after deleting the character at the cursor position in the document processing device according to the present invention. Components that are the same as those in FIG. 4 are given the same reference numerals.

In the figure, (a) shows an example of text display before character deletion, (b) shows an example of dividing the text information storage area 111, 901 shows the cursor position where character deletion is performed, and 902 903 indicates the set first and third dividing points, and 903 indicates the set second and fourth dividing points. (c) shows an example of a displayed document after character deletion, (d) shows an example of dividing the text information storage area 111, 906 shows a new second dividing point, 904 shows the first dividing point, the third dividing point , and 905 indicates the fourth division point. (e) shows an example of the displayed text after executing the UNDO function, and (f) shows the text information storage area 1.
11 division examples are shown, 907 indicates the first division point and third division point updated by the UNDO function, 908 indicates the second division point and fourth division point, and 909 indicates other than the division point.

On the other hand, if the key determined in step (4) is a key for deleting the character at the cursor position, the text information storage area is moved to 2 at the cursor position as shown in FIG.
Divide (23). Next, the position information of the first division point of the first half area divided into two is stored in the first division point position information area 113, and the position information of the second division point of the second half area is stored in the second division point position information area 114 ( 24). For example, Fig. 11(b)
The first dividing point position information 902 shown in is stored in the third dividing point position information area 115 and the second dividing point position information 903 is stored in the fourth dividing point position information area 116 (25). Next, the contents of the second dividing point position information area 114 are updated so that the second dividing point 906 indicates the character position next to the cursor character at the beginning of the second half area (26). Thereafter, the text after the character at the cursor position has been deleted is displayed (27), and the process returns to step (3). As a result, the text with the characters deleted is displayed on the display 6 as shown in FIG. 11(c).

[0046] Thereafter, if it is determined in step (4) that the UNDO key has been input, the UND key is input in steps (5) and (6).
When the O function process is executed, the text after the UNDO function process is displayed on the display 6 as shown in FIG. 11(e).

As described above, the restoration of the original text after deletion of the character at the cursor position is carried out by changing only the dividing point of the divided latter half area. In addition,
In this embodiment, only the second half area is changed when deleting the character at the cursor position, but even if only the first half area is changed, the UNDO function is the same for deleting the character before the cursor, for example. It is executed as follows. Furthermore, if the deletion character is information of a plurality of characters and the UNDO function is executed each time the information is divided and arranged into the first half area and the second half area, a wide range of applications becomes possible. [UN after moving block range
DO function processing example] FIG. 12 is a schematic diagram showing the UNDO function processing state transition after block range movement in the document processing apparatus according to the present invention, and the same parts as in FIGS. 2 and 4 are given the same reference numerals. be.

In the figure, (a) shows an example of displaying the set block range and the text to move to, 1001 shows the specified character string block range, for example "ABC", and 1002 shows the specified character string block range 1001. A specified cursor specified after the block range is shown as the movement destination, (b) shows an example of a document displayed after the block range has been moved, and (c) shows an example of division of the text information storage area 111. , 1003 indicates the set first division point, and 1004 indicates the set second division point. (d) shows an example of dividing the text information storage area 111, 1005 shows the set third dividing point, 1006 shows the set first dividing point,
1007 indicates the set fourth division point, and 1008 indicates the set second division point.

On the other hand, if the key determined in step (4) is a key that executes the function of setting a block range and moving it, the process proceeds to step (28) and thereafter, and the above-mentioned function processing is performed. If it is determined that the key is a key other than the key determined in step (39
).

In step (28), the block range is set by the operator, for example, by using the cursor control key group 220 in accordance with the procedure displayed on the display 6. Next, the operator moves the cursor 10 to the destination of the designated character string block range 1001 that has been set.
02 (29). As shown in FIG. 12, the text information storage area is divided into two at the position of the cursor 1002 (30
). Next, the first dividing point 100 of the first half area divided into two
3 is stored in the first division point position information area 113, and the position information of the second division point 1004 in the latter half area is stored in the second division point position information area 114 (31). Next, the characters indicated by the first division point from the first character of the block range of the divided first half area are copied so as to be positioned in front of the divided second half area (32), and the characters of the block range of the copied second half area are copied. The first character position is stored as the fourth division point 1007 in the fourth division point position information area 116 (33). Next, the position of the character before the first character in the block range of the first half area before copying is set as the third division point, and the third division point position information area 115
(34). Next, in order to delete the block range in the first half area, the character from the last character in the block range to the character indicated by the first division point is moved and arranged after the third division point set in step (34) (35 ),moreover,
Copy the character string in the block range moved to the rear area so that it continues after the placed character string (36), and update the first division point with the position of the last character in the copied block range as the first division point. (37). As a result, for example, FIG. 12 (
As shown in d), the third division point 1005, the first division point 1
006, a fourth dividing point 1007, and a second dividing point 1008 are set to divide the text information storage area 111, respectively. Next, as shown in FIG. 12(b), the text after the block range has been moved is displayed on the display 6 (38).

[0051] Thereafter, if it is determined in step (4) that the UNDO key has been input, the UND key is input in steps (5) and (6).
When the O function is executed, the state shown in FIG. 12(b) changes from the state shown in FIG.
The display is switched to the state shown in (a). As described above, even when moving a block range, by effectively using the free area of the divided text information, the movement can be executed without having a special area other than the text information area. Furthermore, this embodiment can be applied to various block operations other than movement. [Example of text replacement processing using UNDO function] In step (40) of the flowchart shown in FIG. 8, the value of the first dividing point position information area 113 is exchanged with the content of the third dividing point position information area 115, The contents of the second division point position information area 114 and the fourth
and the contents of the dividing point position information 116, and step (4)
In step 1), the text after the UNDO function is executed is displayed in the same process as step (16). This allows for example the step (
40), by setting the first dividing point 707 shown in FIG. 9(c) as the third dividing point and the second dividing point 709 as the fourth dividing point, the UNDO function is activated after executing the search and replace. The display screen shown in FIG. 5(a) returned in step 10 is returned to the screen shown in FIG. 5(c) after execution of search and replace by the next UNDO function. Similarly, 808 other than the dividing point shown in FIG. 10(f) is set as the third dividing point, dividing point other than the dividing point shown in FIG. 11(f) is set as the third dividing point, and the dividing point 808 shown in FIG. 12(d) is set as the third dividing point. The first dividing point 1006 is the third dividing point, and the second dividing point is 100.
By setting 8 as the fourth division point, in each embodiment as well, it is possible to return the screen after UNDO execution to the screen after function execution.

As described above, in a document processing device that divides the text information storage area 111 into two parts, each of the two division points (first division point, second division point) has a division point ( By having the third division point and fourth division point), UNDO functions for various functions can be executed without having a special area for UNDO functions other than the text information storage area.

Furthermore, by effectively utilizing the function of the added dividing point, it is possible to use it for functions other than the UNDDO function, such as rearranging data between columns. Furthermore, although an electronic typewriter has been described as an example of a device to which this embodiment can be applied, it is also applicable to other document processing devices (for example, a Japanese word processor).

[0054]

As explained above, the present invention provides an instruction means for instructing the start of a predetermined editing of text information or text restoration, and a method for dividing the text storage area of a memory medium based on the instruction to start editing by the instruction means. an area dividing means for
Sequentially setting a plurality of pieces of division position information in the divided areas based on the editing instruction by the instruction means, and setting the setting state of each piece of division position information set in the divided areas based on the text restoration instruction by the instruction means. Since the update means for updating is provided, it is possible to start an undo process corresponding to a desired editing function without expanding a new memory area for the process of restoring the deleted text.

The updating means also includes first division information setting means for writing and setting first and second division position information of each divided area divided by the area dividing means into the divided area;
a second division information setting means for writing and setting the first and second division position information being set in the divided area as third and fourth division position information, respectively, in response to a predetermined editing start instruction from the instruction means; , a return means for returning the third and fourth division position information to the first and second division position information within the divided area in response to a text return instruction from the instruction means,
Since the information necessary for the undo process can be set in the text storage area, the undo process can be activated after various editing functions have been processed without expanding the memory capacity.

Furthermore, the third and fourth division position information set by the second division information setting means based on the text restoration instruction by the instruction means are combined with the corresponding first and second division position information and the respective division areas. A third division information setting means is provided for setting exchangeable information, and after starting the undo process, it is possible to return to the state before starting the undo process, that is, to various editing function processes.

Therefore, even if the text storage area is limited, it is possible to effectively activate undo processing associated with various editing functions.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of a document processing device according to an embodiment of the present invention.

FIG. 2 is a system block diagram illustrating a control configuration of the document processing apparatus shown in FIG. 1;

FIG. 3 is a plan view showing the arrangement of keys on the keyboard section shown in FIG. 2;

4 is a schematic diagram illustrating the data structure of the RAM shown in FIG. 2; FIG.

FIG. 5 is a schematic diagram showing the progress of undo processing in the document processing device according to the present invention.

FIG. 6 is a flowchart showing an example of an undo processing procedure in the document processing device according to the present invention.

FIG. 7 is a flowchart showing an example of an undo processing procedure in the document processing device according to the present invention.

FIG. 8 is a flowchart showing an example of an undo processing procedure in the document processing device according to the present invention.

FIG. 9 is a schematic diagram showing the transition of the UNDO function processing state after the search and replace function in the document processing apparatus according to the present invention.

FIG. 10 is a schematic diagram showing the UNDO function processing state transition after character input in the document processing device according to the present invention.

FIG. 11 is a schematic diagram showing the UNDO function processing state transition after deleting a character at the cursor position in the document processing device according to the present invention.

FIG. 12 is a schematic diagram showing the UNDO function processing state transition after block range movement in the document processing apparatus according to the present invention.

[Explanation of symbols]

1 Keyboard section 6 Indicator 100 CPU 100a Update means 100b Area dividing means 102 ROM 103 RAM

Claims (3)

[Claims] Claims: 1. A document processing device comprising a memory medium for storing input text information, comprising an instruction means for instructing to start a predetermined editing of the text information or to return to the text, and an instruction to start editing based on the instruction to start editing by the instruction means. area dividing means for dividing a text storage area of a memory medium; and sequentially setting a plurality of division position information in the divided areas based on an editing instruction by the instruction means, and in response to an instruction to restore the text by the instruction means. A document processing apparatus comprising: updating means for updating the setting state of each division position information set within the division area based on the divided area. 2. The updating means includes a first division information setting means for writing and setting first and second division position information of each divided area divided by the area dividing means into the divided area, and an instruction means. The first one being set in response to a predetermined editing start instruction from
, second division information setting means for writing and setting second division position information as third and fourth division position information in the divided areas, respectively; 2. The document processing apparatus according to claim 1, further comprising a return means for returning the fourth division position information to the first and second division position information within the divided area. 3. The third and fourth division position information set by the second division information setting means based on the text restoration instruction by the instruction means are used to add the third and fourth division position information to the corresponding first and second division position information, respectively. 3. The document processing apparatus according to claim 2, further comprising third division information setting means for setting exchangeable information in the area.