JPH0677191B2 - Display control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a display control method for displaying an edited result when a document being displayed is edited by inserting a character string or the like.

[Prior Art] In a display device in a conventional word processor,
It is difficult to grasp the print result from the display screen because the display is made in a format that does not necessarily match the format used for printing and the document for one page could not be displayed on one screen. .

Therefore, in order to grasp the print result, it is necessary to display a layout in which characters are symbolized, in addition to the document display for inputting / editing.

In order to solve the above-mentioned drawbacks, in recent years, a display device called a bitmap display, which can display one page of data on one screen in high resolution according to a format, has appeared.

However, in such a device, when inputting or editing, the influence may affect each character position of the entire page being displayed. For example, the floating block in formatting may be pushed to the previous page or pushed to the next page according to the insertion / deletion of the character string before and after, and the display content is also changed significantly. It

Therefore, in the conventional bitmap display, the position of each character on the entire one page being displayed is determined again according to the format information every time inputting or editing is performed, and the character is displayed again. However, there is a problem that sufficient display responsiveness cannot be obtained.

[Objective] In view of the above points, an object of the present invention is to display a character string on a display screen in a state as close as possible to a printing state, and at the time of editing the character string, a special area such as an extended display area in the display screen. An object of the present invention is to provide a display control method capable of promptly displaying a character string after editing without providing.

Embodiment An embodiment according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a system block diagram of a personal computer including a display device according to an embodiment of the present invention.
In the figure, 1 is used in a raster scan display system.
CRT display unit, 2 is a video RAM (VRAM) that stores display pattern information for one screen in a dot matrix, and 3 is VRAM2
Is a display control unit that controls writing of pattern information to and reading from the CRT. Reference numeral 4 denotes a microprocessor (MPU) having a main memory 5, which performs main control of the personal computer system and main control of the display device of the embodiment. A main memory 5 stores, for example, the control procedure shown in FIG. 4 in PMEM, the document in BMEM, the format information which is format information in FMEM, and the cursor position in CC. For MPU4
A pointing device (PD) 8 for movably inputting a position designation to the CRT display unit 1 and a keyboard 9 for inputting data and instructing typesetting are connected. A disk device 6 stores a set of character patterns, symbols, and graphic patterns called a font file. And each of these building blocks is I / O of MPU4.
It is connected by O bus 7.

2A, 2B and 2C are explanatory views showing the display mode of the embodiment. FIG. 2 shows a formatted document for one page. 10b is a logical display frame called a printing plate.

Now, if the data in the shaded area of 10a is deleted, it becomes as shown in FIG. 2B. This does not reformat the data on the entire page, but only the edited lines are used for character closing and kinsoku processing. As a result, it looks like 10c.

FIG. 2C shows that a hatched portion of 10d is inserted in the document of FIG. 2A. When inserting, if the data can be absorbed by the typesetting process of one line, the typesetting is performed only on the inserted line. However, if it can not be absorbed by one line, it will be lowered line by line from the bottom line to the last line of the display page, and the overflowed character string will be displayed as 10e. This time 1
0f is displayed beyond the printing plate 10b. The display of 10f is performed as much as physically possible.

FIG. 3 is a block diagram showing the control concept of the display device of the embodiment. The control is mainly performed by the MPU 4, and FIGS. 4 and 5 are flowcharts showing the execution procedure of the MPU 4.

In FIG. 4, step 51 corresponds to the display step of the present invention, steps 52 to 55 correspond to the insertion instruction step, step 56 corresponds to the judgment step, and steps 57 to 62 correspond to the insertion result display step. ing. The operation of the embodiment described above will be described with reference to FIGS. 4 and 5.

In step 50, code data that is a character code or a command code is read into the memory BMEM in the main memory 5. The code data may be read from the document file of the disk device 6 or read from the keyboard 8 (may be input).

Step 51 is executed by the page composition control 4b
The contents of BMEM are displayed for one page according to the format information stored in the memory FMEM. Specifically, the page composition control 4b fetches the contents of the memory BMEM in order, and the line composition control 4c performs line-by-line character packing and prohibition processing, while balancing the number of characters in each line, page head, end-of-page prohibition, pillars, and page numbers. Processing is performed to prepare a one-page structure, and display control 4d develops a one-page image in the VRAM. At this time, the display control 4d receives the information about the code and character style of each character, the size of the character, and the expansion position, and based on this, obtains the character pattern from the font file of the disk device 6 and expands it on the VRAM. The control means 4a mainly performs the processing from steps 52 to 62. When data is received from the keyboard 9 in step 52, it is tested in step 53 whether or not it is an instruction to end the process. If not, the type of input is tested in step 54. If it is an instruction to reformat the entire page, return to step 51,
Formats and displays the entire page. If data is inserted or deleted, the process proceeds to step 55, the line typesetting control 4c performs the line spacing prohibition process, and the display control 4d displays it.
In step 56, a test is performed as to whether or not all the data has been displayed in the relevant line, and if it is displayed, the process returns to the input from the keyboard in step 52, and the above-mentioned steps are repeated.
If it is not displayed, the line after step 60 to 62 is moved down one line at a time to create a blank line and move to the process of displaying the overflow of the inserted data, but if you do this immediately, it will move to the same position. There is a step 57 to 59 because the row after the next row is lowered at each insertion in the case of consecutive insertion of and there is a possibility that a row with an empty space behind is created continuously. First, in step 57, it is tested whether or not there is still room in the next line, and if there is no space, go to step 60. Whether or not there is space is determined by the number of lines on one page of formatting and the storage capacity (display capacity) of VRAM. If there is a vacancy, the overflow and the data of the next line are combined in step 58, the line-composition control 4c performs the character-filling prohibition process of the next line, and the display control 4d displays the data. After that, in step 59, it is tested whether there is overflow, and if there is overflow, go to step 60.
The process returns to the keyboard input processing in step 52. In step 60, the next line is carried forward. Memory at this time
The line number data in which the number of lines of the page is increased is stored in the FMEM format information. Such processing can be performed at high speed because the page composition control 4b is not moved and only the operation on the VRAM is performed. In step 61, the overflow is displayed in a blank line on the empty line, and steps 60 and 61 are repeated until the overflow in the test in step 62 is exhausted.

When the page is enlarged as described above, the cursor is moved to the position of the overflowing line and the control key is operated to return the display screen to the screen based on the original format information.

As shown in the control procedure in FIG. 5, it is checked whether the control key has been operated. If so, cursor memory
CC contents (The cursor moves on the screen with the pointing device, and the contents of the cursor memory change accordingly.)
Read. If it is an overflow line (identified by the format information), include the contents of the next page including the overflow line in VRAM.
Memorize and display. If it is not an overflow line, move the original page data to VRAM and erase the overflow line from the display.

In the above example, the overflow line was explained, but when the number of lines on one page becomes small due to deletion, part of the contents of the next page is moved to the page.

When displaying the overflow line as described above, the line may be displayed in color. In that case, color information is added to the information to be inserted at the judgment of the overflow line in FIG. 4, and it is distinguished from the display information of the page. In that case, it is assumed that the display device is in color and has a color identification circuit of the display device.

[Effect] As described above, according to the present invention, when a character string is edited, it is determined that a composite character string obtained by inserting another character string into a character string on a certain line does not fit on one line. In this case, in order to secure a region in which the composite character string can be displayed, the line after the insertion position is displayed in line units, and the composite character string is formatted after the line including the insertion position. Since it is displayed continuously based on the information, there is an effect that the edited character string can be quickly displayed while displaying the character string on the display screen in a state as close as possible to the printed state.

Further, since it is not necessary to provide a special area such as an extended display area in the display screen, the effect that the screen can be widely used as a display area is obtained.

[Brief description of drawings]

 FIG. 1 is a block diagram of an embodiment according to the present invention. FIGS. 2A, 2B and 2C are diagrams for explaining a display mode of a display device. FIG. 3 is a diagram for explaining the operation of a microprocessor. Fig. 5 is a diagram explaining the control procedure of PMEM …… Memory BMEM …… Memory FMEM …… Memory

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaki Saai, 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) References JP-A-54-7826 (JP, A)

Claims (1)

[Claims] 1. A display step of displaying a document page by page based on format information defining a character arrangement in the document, and an insertion instruction for instructing insertion of a character string in the document displayed by the display step. Step, and when a composite character string obtained by inserting the character string instructed to be inserted into the character string of the entire line targeted for the insertion instruction process is displayed based on the format information, one line is displayed. And a line after the insertion position in order to secure an area in which the composite character string can be displayed when it is determined that the line does not fit on one line. An insertion result display step of displaying the composite character string continuously after the line including the insertion position based on the format information while displaying the composite character string in a lowered manner.