JPH07319853A - Document processor - Google Patents

Abstract

PURPOSE:To easily judge whether data conversion based upon overwriting is available or not by displaying a document stored in a storage device in order to check it when non-coincidence is detected at the time of comparing document data in a memory with the document stored in the storage device. CONSTITUTION:When the start of storing processing is commanded by a storage start key 1b, a document name is inputted from a keyboard 1 and then a storage execution key 1c is depressed, whether a document having the same document name exists in documents already stored in the storage device 4 or not is checked. When the document name of a document being edited at present does not exist, storing processing is newly executed. When the document name of the document concerned exists, the contents of the stored document are compared with the contents of an editing buffer 2a in order to execute overwriting storage. When both the contents coincide with each other, the restorage of the document is unnecessary. When both the contents are different from each other, the contents of a storing document to be overwritten are displayed on a display device 3.

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 for storing and updating various data such as text images such as document data stored in a Japanese word processor.

[0002]

2. Description of the Related Art In a conventional Japanese word processor,
Even if the document data is saved by overwriting the already saved document, the confirmation message such as "Are you sure you want to overwrite it?" Is displayed. To check the contents of the saved document to be overwritten , Had to call that document, the operation was cumbersome. In addition, in a commercially available Japanese word processor, even when performing an update save, the file before resave is registered in the restore file list so that the deleted file can be restored later.

The technical contents described in Japanese Patent Laid-Open No. 173865/1990 allows a status indicating whether or not rewriting (overwriting) is possible for each document to be set, and a master document is set in advance so that rewriting is prohibited. The warning is displayed when there is an instruction to rewrite the master document. In addition, JP-A-5-4
The technical content described in Japanese Patent No. 6339 is to allow an operator to reconfirm the execution of the final processing at the final processing of the document update so that the updated document is not accidentally erased.

[0004]

[Problems to be Solved by the Invention] In a conventional Japanese word processor or the like, even when the document data is overwritten on an already saved document, a confirmation message such as "Do you want to overwrite it?" Is displayed. Met. For this reason, it is often difficult to know whether the saved document may be changed by overwriting, and the operator often accidentally changes the important document by overwriting. Further, in order for the operator to confirm the contents of the document to be overwritten, the operator has to call the document, which is complicated.

Further, in the above-mentioned commercially available Japanese word processor, files are created irrespective of the operator's intention, and the storage device capacity is heavily used. Further, with this method, the contents of the file saved in the restoration file and the contents of the file saved by the operator's intention cannot be simultaneously compared on the screen.

In order to prevent the important document from being accidentally changed by overwriting, the above-mentioned Japanese Patent Laid-Open No. 2-173865.
Techniques such as Japanese Patent Laid-Open No. 5-46339 have been proposed. In the former case, the master document must be set to prohibit rewriting, and in the case of a relatively small-scale system configuration such as a personal word processor, there is a problem that the operation is too complicated compared to the merit. In the latter case, a message for reconfirmation is displayed in response to an inadvertent rewriting instruction, but since the contents of the rewritten document are not displayed at the same time, there is a problem that it is difficult to confirm whether or not the document can be rewritten. Therefore, in the present invention, it is possible to compare the document being edited with the document in the storage device at the time of updating and saving, and if there is a mismatch, both documents are displayed on the screen to visually recognize the difference.

However, the above display method cannot catch the difference instantaneously because only two documents are lined up. Therefore, according to the present invention, in the two documents arranged side by side, when the document in the storage device is displayed, the mismatched portion with the document being edited is searched, and the characters after the first character of the mismatched portion are different from the characters in the document being edited. The display is performed by using the display so that the operator can be instantly notified of the beginning of the mismatched portion.

Further, in order to compare two documents, it is necessary to read the document in the storage device into the work RAM in the document processing device, but the capacity of the work RAM is limited,
Documents exceeding the capacity of the work RAM cannot be read from the storage device at one time. Therefore, in the present invention, the work R
When reading a document file larger than the capacity of AM from the storage device, the document file in the storage device is divided by the size of the work RAM, the limited capacity is sequentially read, and the operation of comparing with the document data in the memory is repeated.
The comparison with the document being edited is variable without depending on the size of the document in the storage device.

[0009]

In order to solve the above-mentioned problems, the present invention erases relevant document data in an external storage device and then overwrites and saves the document data currently being edited in a document processing device. When comparing, the document data in the work memory and the document in the external storage device are compared with each other, and the document in the external storage device is checked for confirmation when a mismatch is detected by the comparison in the document comparison device. It is characterized by comprising display means for displaying and designation means for designating whether to execute or cancel overwriting.

Further, when the non-coincidence portion detection means for detecting the non-coincidence portion of the document data which is compared by the comparison means and read out from the external storage device and the non-coincidence portion of the document is detected by the non-coincidence portion detection means, the document is being edited. Display control means for developing an image in the display memory so that the respective document data including the document data and the preceding and following data of the non-matching portion corresponding to the document data can be compared, and after the first part of the document data where the difference appears Display means for changing and displaying the form of the document data.

Further, the data file read from the external storage device sequentially reads the document data of a limited capacity regardless of the work memory capacity, and compares the document data in the work memory with the document comparison means. To do.

[0012]

According to the structure described in claim 1, when an attempt is made to overwrite and save, the data to be overwritten in the storage device is read into the work memory in the document processing device, and the CPU compares it with the text memory, and the difference is made. If is detected, the document in the storage device is displayed on the screen.

According to the structure of the second aspect, when editing the text data stored externally, the data is once read into the work memory and the document is re-edited. Therefore, the text data in the external memory and the data in the work memory are not all expanded, and are sequentially fetched and compared, and if a mismatch is detected, the data before and after the mismatch is fetched from the memory. Memory size shall be provided for the display screen. By displaying the data of the relevant part being edited on the right half of the display memory and displaying the data of the relevant part loaded from the file on the left half, it is possible to display both documents at the same time. . In that case, the data after the non-matching portion of the comparison data read from the file side is displayed in a shaded manner.

According to the third aspect of the invention, when the data to be overwritten in the storage device exceeds the RAM capacity of the document processing device, the document in the storage device is divided and read into the RAM, and the comparison of the read portions is completed. For example, the operation of reading the next portion of the document in the storage device is repeated, and all the portions of the overwrite target data in the storage device are compared.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A document processing apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a system configuration diagram of the present device. The keyboard 1 is a key input device, and when a key is pressed, a key code is generated. On the keyboard 1, character keys 1a stored in the document as characters, a save start key 1b for instructing a save operation, a save execution key 1c, and a process continue key 1
There is a d operation key.

The editing device 2 stores the character corresponding to the received key. These include an edit buffer 2a for storing a character string, a work RAM 2b for storing document data read from a storage device, a character and a work R in the edit buffer.
There is a character comparison mechanism 2c for comparing AM characters. The display device 3 displays the contents of the edit buffer 2a, the characters of the message, and the like by displaying according to the bitmap data from the display control unit.

The storage device 4 stores the contents of the edit buffer. This is configured so that there is at least one storage area for writing the contents of the edit buffer 2a and the information accompanying it as one file, and a document name storage area for writing a name (document name) corresponding to a document. 4a and a document storage area 4b for storing the contents of the edit buffer 2a. For ease of explanation, it is assumed that these storage areas have the same size in every file.

The display control unit 5 has a correspondence table of character codes called CG data 5a and bitmap data for display, receives the character code from the CPU, and displays the bitmap data corresponding to the character on the display device 3. Output. The CPU 6 is a central processing unit that controls the operation of the entire system.

Next, in the operation flow chart shown in FIG.
The configuration according to claim 1 will be described. When a key is pressed on the keyboard 1 for input, key codes are sequentially output to the editing device 2. When the editing device 2 receives the key code, it performs an editing process and stores a character string corresponding to the key code in the editing buffer 2a. In addition, edit buffer 2
Request that the character string in a is displayed on the display device 3.
Here, in order to store the contents of the edit buffer 2a in the storage device 4, first, the saving start key 1b is instructed to start the saving process (S1). Then, the document name is input from the keyboard 1 (S2). After that, when the save execution key 1c is pressed (S3), the document name and the document (contents of the edit buffer) are saved in the storage device 4. As an example, as shown in the structure of one file in FIG. 2B, the content of the edit buffer 2a is "12".
345 ”and the document name indicates the state of the storage device when the data of“ ABC ”is stored.

After that, the contents of the edit buffer 2a can be stored again in the storage device 4, and this processing is carried out in the following procedure. First, when the save processing key 1b is instructed to start the save processing, the document name is input from the keyboard 1, and the save execution key 1c is pressed, the same document name is given to the document already saved in the storage device 4. It is checked whether or not there is any (S6).

As shown in the structure of the storage device of FIG. 2A, the document name storage area in the storage device 4 is 1 sector and the document storage area is 10 sectors. Therefore, if the document names are different, 11 sectors ( It skips over to the beginning of the file (S8) and checks the document name again. This operation is repeated, and if there is no document name of the document currently edited (S5),
A new saving process will be performed. If there is, it is necessary to overwrite and save, so the contents of the saved document are compared with the contents of the edit buffer 2a (S6). If they match, there is no need to save again. When they do not match, the contents of the overwritten saved document are displayed on the display device 3.

As a result, the contents of the edit buffer 2a are
In the case of overwriting with the document name already saved in the storage device 4, if the content is different from the saved document, the content of the overwritten saved document is displayed (S10).

Next, in the operation flow chart shown in FIG.
The configuration described in claim 2 will be described. As shown in the display example on the display device of FIG. 2C, the contents displayed on the display device 3 are the data fetched from the storage device 4 on the left half of the screen and the edit buffer 2a on the right half of the screen. It is the data in.

The characters read into the work RAM 2b and the characters in the edit buffer 2a are compared character by character using the character comparison mechanism 2c (S22, S23). Continue comparing characters. If they do not match, the character string after the first character that does not match is displayed in a different form from the display of the character strings up to that point (S24). There are the following means as a concrete realization method. Document data in the storage device 4 is JIS character by character
Remembered by code. Work RA from within storage device 4
After reading into M2b, the characters are compared character by character, and if a mismatch is detected, the characters after the mismatch are displayed.
As shown in the example of changing the one-character display form in FIG. 3A, the IS code is set with a display form change bit and displayed. The display control unit 5 refers to the CG data (the JIS code of each character and the corresponding display bitmap data) 5a for the JIS code transferred from the CPU 6, and refers to the bitmap data for display on the display device 3. To transfer. As a result, of the document display in the storage device, the same portion as the edit buffer 2a is normally displayed, and the display form is changed and displayed after the non-matching portion.

In the present invention, the characters are simply compared one by one, and the same display form is taken in all the non-coincidence portions. However, at the current technical level, MS-DO is used.
A technique for displaying only the non-matching portion such as the FC command of S and the DIFF command of UNIX has been established.

Next, in the operation flow chart shown in FIG.
The configuration according to claim 3 will be described. When the data stored in the storage device 4 is read into the work RAM 2b, all of the one data file is read from the work RAM 2b based on the capacity of the work RAM 2b and the size of the data file.
It may not be possible to read into b. In such a case, in the present invention, the data file is divided by the capacity of the work RAM 2b, and the divided blocks are compared.

For example, as in the case where the document data in the storage device in FIG. 3B is larger than the work RAM capacity, R
It is assumed that there are document data in the storage device and the document processing device having the AM capacity. The CPU 6 of FIG. 1 counts 1000 characters from the document storage area 4b of the storage device 4, and EOF
The document data is transferred to the work RAM while checking that the (symbol indicating the end of the file) does not appear (S31). Document data in the symbol device is 2500 characters,
When the work RAM has a capacity of 1000 characters, data transfer from the storage device to the work RAM is performed three times (S32).

If the EOF is present (S33), the EOF flag is set to ON (S34), and the work R described above is set.
The data taken into the AM 2b and the data in the edit buffer 2a are compared and displayed (S35). EOF flag is O
During FF (S36), if the process continue key 1d is pressed (S37), the data file in the storage device is saved as work RA.
It is divided by the capacity of M2b (1000 characters in this example) and transferred to the work RAM 2b (S38).
The data captured in 2b and the data in the edit buffer 2a are compared and displayed.

[0029]

According to the present invention having the storage structure described in claim 1, the document data in the memory is compared with the document in the storage device when overwriting and saving, and when a discrepancy is found, the storage device for confirmation. View documents in. As a result, the content of the saved document can be confirmed, and it becomes easy to determine whether or not the document may be changed by overwriting. Therefore, it is difficult for the operator to accidentally change an important document by overwriting.

With the present apparatus having the structure described in claim 2, the contents in the storage device and the document being edited are displayed at the same time, and the document of the different portion is marked, so that the changed portion can be easily understood. Further, to detect the document of the different portion, the MS-DOS FC command or the UNIX DIF is used.
Although there is a case of displaying only the document of the different portion like the F command, in the present invention, all the documents after the first mismatch are displayed.

Since the present apparatus having the storage configuration according to claim 3 can perform comparison regardless of the size of the data to be overwritten in the storage device, regardless of the size of the data, from the beginning of the mutual data. You can check the difference all the way to the end.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a document processing apparatus according to the present invention.

2A and 2B are diagrams showing a structure of a storage device, a structure of one file, and a display example on a display device in the document processing apparatus according to the present invention.

3A and 3B are diagrams showing an example of changing the display form of one character and an example in the case where the document data in the storage device is larger than the work RAM capacity in the document processing apparatus according to the present invention.

FIG. 4 is an operation flowchart of the present apparatus.

FIG. 5 is another operation flowchart of the present apparatus.

FIG. 6 is another operation flowchart of the present apparatus.

[Explanation of symbols]

 1 Keyboard 2 Editing Device 3 Display Device 4 Storage Device 5 Display Control Unit 6 CPU

Claims (3)

[Claims] 1. A document comparison for comparing the document data in the work memory with the document in the external storage device when overwriting and saving the document data currently being edited after erasing the corresponding document data in the external storage device. Means, display means for displaying the document in the external storage device for confirmation when a discrepancy is detected by the comparison in the document comparison means, and designating means for designating whether or not to overwrite. A document processing device characterized by the above. 2. A non-matching portion detecting means for detecting a non-matching portion of document data read out from an external storage device by being compared by the comparing means; and a non-matching portion of the document being detected by the non-matching portion detecting means, the document is being edited. Display control means for developing an image in the display memory so that the respective document data including the document data and the preceding and following data of the non-matching portion corresponding to the document data can be compared, and after the first part of the document data where the difference appears The document processing apparatus according to claim 1, further comprising a display unit that changes and displays the form of the document data. 3. The data file read from the external storage device sequentially reads document data of a limited capacity regardless of the work memory capacity, and compares the document data in the work memory with the document comparison means. The document processing apparatus according to claim 1.