JPH0638188B2 - Character processing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a character processing method having a tab setting function.

[Prior Art] Conventionally, there has been a character processing device having a tab setting function. In such a character processing device, when a character is input using the tab function, it is common to set a tab in advance, then specify tab execution and subsequently input a character string. . At that time, a tab mark indicating that the character string was input immediately after the tab was executed was displayed on the display screen at the beginning position of the character string that was continuously input after the tab execution was designated. In this case, it is difficult to immediately confirm on the display screen what information the tab is set to from the left margin, and it is not easy to edit the character string input using the tab later. Had the drawback.

[Purpose] In view of the above points, an object of the present invention is to determine whether or not tab execution is possible, and if so, to make it possible to easily confirm the tab execution position on the display screen so that characters can be efficiently displayed. It is to provide a character processing method that enables editing of columns.

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

FIG. 1 shows an embodiment of the present invention. In the configuration shown, the CPU is a microprocessor that makes logical decisions and the like. BL is a bus line, which is an address bus for specifying the address of each input / output memory, a bidirectional data bus used for various data transfers, read / write of each memory, reception of interrupts, and timing of data sets. It is composed of a control line and the like used for transmitting the data. KB is a keyboard from which the operator inputs various characters or gives instructions to the apparatus. KBC is a keyboard controller that encodes data input from the keyboard KB and sends an interrupt signal to the bus line BL. The LCDC stores a character code to be displayed in the refresh memory RM by the display controller, and displays the character code stored in the refresh memory RM on the liquid crystal display device LCD that can display alphanumeric characters, kana, kanji, etc. by patterning with the character generator CG. The control unit controls the display unit. The LCD is a liquid crystal display device, and in this embodiment, it is assumed that characters and control symbols can be displayed over 20 columns per line. CG is a character generator that stores character patterns. The ROM is a read-only memory, and the control means shown in the flowcharts of FIGS. 6 and 7 have been confirmed.

The RAM is a random access memory and is used for temporary storage of various data. SB is a sentence buffer in which codes of characters and control symbols input from the keyboard are sequentially stored. In this embodiment, it is set to 1W × 100. DP is a display head position pointer, which is a pointer indicating the head of the portion to be displayed in the sentence buffer SB. CR (which takes a value from 0 to 81) is a cursor register and indicates which part of the LCD the cursor is on. When the cursor is at the left end on the display screen, it takes a value of 1, and when it is at the right end, it takes a value of 20. HR is a head position register that stores a value indicating the digit position of the current printer head position counted from the left margin. ing. TT is a tab table, which is a table in which the number of digits for which a tab is set is stored.
The tab table TT is shown in FIG. In this embodiment, the tab table TT has 3 words (1 word = 16 bits).
Shall consist of 16 bits x 3 words = 48 bits correspond to each digit. If the tab is not set, the content of the corresponding bit is "0", and if the tab is set, the content of the corresponding bit. Is "1". For example, if a tab is set at the 5th and 10th digits from the left margin, the contents of the 5th and 10th bits from the head of the tab table are "1" and the other contents are "0". TP is a tab pattern table in which a code corresponding to the number of digits in which the tab is executed is stored. This is shown in FIG. For example, when the tabs are set in the fifth and tenth digits as described above and the input from the tab position in the fifth digit is designated, the code α + 4 is assigned. The display patterns corresponding to these codes are shown in the right column of FIG. These patterns are stored in the character generator CG. PT indicates the address in the sentence buffer in which the tab code is set by the pointer.

FIG. 2 shows a schematic external view of the keyboard KB. CK is a character key group, and is composed of alphanumeric characters, special characters, kana characters, kanji keys, and the like. FK is a group of function keys, FK1 is a cursor left movement key, FK2 is a cursor right movement key, F
K3 is a tab set key, and FK4 is a tab execution key.
FK5 is a printer head left move key, FK6 is a printer head right move key, and FK7 is a print start key. Further, in the present embodiment, the number of printable characters in one line is up to 48.

The tab input processing according to the present invention configured as described above will be described. The character string input from the keyboard is sequentially input from the left end on the display screen as shown in FIG. When 16 characters or more are input, they are scrolled and displayed. In FIG. 3 (1), CM represents a cursor. CR is a control symbol representing a line feed. When it is desired to start the character input from a specific digit (for example, the third digit and the eighth digit of the second line) as shown in FIG. 3 (2) when creating a document, the character input is performed using the tab function. In the present embodiment, the control symbols 3 and 8 shown in FIG. 3 (1) represent tabs and indicate that printing is started from the third digit and the eighth digit, respectively.

Next, the tab setting method and execution method will be described. In the tab setting, the operator uses the printer head moving keys FK5 and FK6 to move the printer head to a desired position for tab setting, and presses the tab set key FK3. For example, in the example of FIG. 3, the printer head is moved to the third digit by using the printer head moving keys FK5 and FK6.
It is assumed that the printer head is moved in units of one digit to be printed by the printer head moving keys FK5 and FK6. After moving, the tab set key FK3 is pressed to set the tab at the third digit. Then, again move the printer head to the 8th digit by the same operation and tab set key F
Press K3. This completes the tab setting. Next, in the tab execution, in the example of FIG. 3, the operator inputs CR (carrier return = line feed) after inputting one line of characters, and 2
Start typing the characters on the line. Here, since it is desired to start inputting from the third digit in the second line, the tab execution key FK4 is pressed.
At this time, the tab mark 3 is displayed on the display screen and the next character input is awaited. Then, three characters "G", "H", and "I" are input, and since it is desired to start the input from the eighth digit, the tab execution key FK4 is pressed again. Then, it is assumed that a display screen as shown in FIG. 3A is obtained by the operation of continuously inputting desired characters. Next, by pressing the print key FK7, the print result as shown in FIG. 3B is obtained.

The above operation will be described in more detail with reference to the drawings.

FIG. 6 is a flowchart showing the head moving process.

FIG. 6 (1) is a diagram showing the head right movement process, and FIG. 6 (2) is a diagram showing the head left movement process. Here, it is assumed that after the power is turned on, the head is set on the left margin and 1 is set in the head position register HR.

When the head right movement key FK6 is pressed, the processing from steps 7, 1, 1 is executed.

In steps 7, 1, 1 the value of the head position register HR and the number of digits of the right margin (48) are compared, and if the value of HR is small, the process proceeds to steps 7, 1, 2 otherwise. In steps 7, 1 and 2, an instruction to move the head one digit to the right is sent to the printer controller PRC. The PRC controls the printer PR according to this command, and the printer head moves right by one digit. Then, proceed to steps 7, 1, and 3.

In steps 7, 1 and 3, the value of the head position register HR is incremented by 1 and the process returns.

When the head left movement key FK5 is pressed, the processing from steps 7, 2, 1 is executed.

In steps 7, 2, and 1, the value of the head position register HR is compared with the number of digits (1) of the left margin, and if the value of HR is large, the process returns to steps 7, 2, and 1, otherwise. Printer controller PR in steps 7, 2 and 2
Send a command to C to move the head one digit to the left. The PRC controls the printer PR according to this command, and the printer head moves left by one digit. Then proceed to steps 7, 2 and 3.

In steps 7, 2 and 3, the value of the head position register HR is decremented by 1 and the process returns.

Next, the tab set process is executed by pressing the tab set key FK3. That is, the content of the bit of the tab table TT corresponding to the value of the head position register HR is set to "1" and the process returns. It is assumed that the tab table TT is all cleared after the power is turned on and all "0" s are entered.

Next, the tab execution process will be described with reference to FIG.

The tab execution process is performed according to the following steps when the tab execution key FK4 is pressed.

In steps 8 and 1, the sentence buffer SB is searched from the beginning to find the end address of the input character string. Then proceed to steps 8 and 2. In steps 8 and 2, the address of the sentence buffer SB into which the tab code is inserted is obtained and the pointer PT is set. If no character is input in the sentence buffer SB as a result of searching in steps 8 and 1, the relative address 0 from the sentence buffer SB is set in the pointer PT and the process proceeds to steps 8 and 3. In other cases, the last character obtained in steps 8 and 1 is examined, and if it is a tab code, the tab execution processing is terminated, and if not, the end address + 1 obtained in steps 8 and 1 is stored in the pointer PT, and the step is executed. Proceed to 8 and 3.

Steps 8 and 3 are a process of telling from the left margin the position of the pointer PT set in steps 8 and 2, and finding out what digit it is. The sentence buffer SB is moved toward the carrier return CR toward the position before the position of the pointer PT. (new line)
The mark or the beginning is searched, and the position of the pointer PT from the left margin is determined by the relative position from the search. Then proceed to steps 8 and 4. In steps 8 and 4, first, the tab table TT is searched, and if no tab is set, the tab execution process ends. If the tab is set, the value of the tab digit set in the tab teeth TT is compared with the number of digits obtained in steps 8 and 3, and is greater than or equal to the number of digits obtained in steps 8 and 3. The value of the tab table TT having the smallest number of digits is set as the tab execution digit, and the process proceeds to steps 8 and 4. If the digit of the above condition is not set in the tab table TT, the tab execution process is ended.

In steps 8 and 5, the code corresponding to the tab execution digit obtained in steps 8 and 4 is obtained by referring to the tab pattern table TP, and steps 8 and 2 in the sentence buffer SB are obtained.
It is put in the position of the pointer PT obtained in. Then, proceed to steps 8 and 6. In steps 8 and 6, the value of 1 is entered in the cursor register CR to move the cursor to the next position where the tab code is input, and the process proceeds to steps 8 and 7.

In steps 8 and 7, the value of the pointer PT obtained in steps 8 and 2 is stored in the display head position pointer DP so that the position of the tab code comes to the left end on the display screen, the display processing is performed, and the tab execution processing ends. .

Further, regarding the print processing for obtaining the print result as shown in FIG. 4B for the tab code set as described above, for example, when the tab code is detected, the tab pattern table TP is referred to and the code is set. It is easily realized by, for example, replacing the corresponding digit number with a space.

[Other Examples]

In the present embodiment, regarding the designation of the tab setting position,
Although the digit is designated by moving the printer head, the S digit number may be input by another method such as a keyboard.

Further, in the present embodiment, although the display screen is a display device having one line, even in a display device capable of displaying a large number of lines such as a CRT display, the indent setting digit can be confirmed at a glance, so the gist of the present invention is impaired. Absent.

〔effect〕

As described above, according to the present invention, it is possible to determine whether or not a tab can be executed, and if it is possible, the tab execution position can be easily confirmed on the display screen, which enables efficient document creation. become.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the configuration of the character processing device of the present invention. FIG. 2 is a schematic external view of the keyboard KB shown in FIG. FIG. 3 (1) is a diagram showing a specific example of a part of a display device or a centes buffer corresponding thereto. FIG. 3B is a diagram showing a specific example of the print result corresponding to FIG. FIG. 4 is a diagram showing a specific example of the tab table TT. FIG. 5 is an explanatory diagram illustrating the tab pattern table TP. FIG. 6 is a flowchart showing a control procedure of printer head movement processing. FIG. 7 is a flowchart showing the control procedure of the tab execution process. CPU ... Microprocessor BL ... Bus line KBC ... Keyboard controller KB ... Keyboard LCDC ... Display controller LCD ... Display device RM ... Refresh memory CG ... Character generator ROM ... Control memory RAM ... Random access memory SB ... Sentence buffer DP ... Display position start pointer CR ... Cursor register HR ... Head position register TT ... Tab table TP ... Tab pattern table PRC ... Printer controller PR ... Printer

Claims (1)

[Claims] 1. When tab execution is instructed, the end of the document is searched to determine whether a tab code exists at the end of the document, and it is determined that a tab code exists at the end of the document. If it is determined that the tab code does not exist at the end of the document, it is determined whether the tab position is previously set, and the tab position is previously set. If not, if the tab position has been set previously, if the tab position has been set, the pattern representing the position is displayed, and the pattern comes to the end on the display screen. Like
In addition, the character processing method is characterized in that the display is controlled so that the cursor comes to the next position.