JPS61138340A - Editing device of picture - Google Patents

Abstract

PURPOSE:To increase the number of lines to be displayed on one picture and to attain a picture editing improved at its editing property by contracting the size of respective characters of a source program to display a graph, dividing one picture vertically to display plural strings. CONSTITUTION:At the editing of the whole source program in the contraction mode, an operation for the character contraction is necessary. In a procedure, the contents of a text buffer 3 is blanked and a character display in the normal mode is erased. Then, the program source stored in a memory 7 is read out and a contraction character font buffer 8 is accessed to read out the corresponding contraction character font. The read-out font is written in a graphic video RAM (VRAM) 4. SAid operation is repeated by the wholl pictures and the characters having 80 digits X 60 digits X 2 strings are displayed. Keying and editing processing are executed in the memory similarly to the normal editing mode and the contracted result is displayed, so that the editing operation in the contraction display mode is same as that of the normal mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a screen editing device, and particularly to a screen editing device suitable for input 1 editing and syntax checking of program sources.

[Prior art]

Conventional screen editing has the advantage of being able to edit exactly as it appears on the screen7), and since one screen can only display about 25 lines, it is difficult to edit program sources related to the previous screen. When editing, it was necessary to edit while looking at the list printed on paper.

Furthermore, in order to overcome this drawback, some programs allow editing by dividing the screen so that several separate parts of the program source can be displayed on the same screen. However, since the total number of lines visible at one time is the same, the editability of program sources has not improved much. There are also screen editing devices that increase the screen resolution itself and increase the number of lines that can be displayed at once. But the display bag! This posed an economical problem as it required faster speeds and an increase in screen buffer capacity.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a screen editing device that increases the number of lines displayed on one screen without using hardware and improves editing performance.

[Summary of the invention]

The present invention reduces the size of each character constituting a source program to display it graphically, and divides one screen vertically to display multiple columns, thereby increasing the number of lines displayed on one screen. I made it do so.

Furthermore, the present invention allows only specific sentences of the program source to be specified for reduced display, thereby improving the efficiency of checking the entire sentence.

[Embodiments of the invention]

Figure 1 (a) shows the size of one kanji character on a normal CR7 screen, and Figure 1 (b) shows the size of one alphabetic character.

The size of Kanji is 16 x 16 dots, and the size of alphabetic characters is 16 x 8 dots. The kanji and alphabetic characters to be displayed on the CR7 screen are used to display various explanatory texts, commands, and characters in combination with graphs and images.

However, in addition to their role as display information, kanji and alphabets are also used as programming languages.

Programs, especially program sources, may be edited using the CR7 screen. Most programs have a small number of Kanji characters and use many English words instead. Therefore, when editing the program source, there is no problem in editing the language to be displayed on the CR7 screen even if the Chinese characters are ignored.

Here, editing the program source means adding, deleting, and correcting steps constituting the program.

Therefore, the alphabetic characters that form the basis of the program source are reduced. At this time, kanji in the program source are ignored. The way to ignore it is to replace the kanji with meaningless patterns (for example, all the kanji are replaced with small square patterns "r 口"). The size of a meaningless pattern may be the same size as a reduced alphabetic character.

FIG. 2 is an example of reduced alphabetic characters. 6 x 16x8 dots
I made it the size of x4 dots. As a result, the area occupied by one character can be reduced to about one-fifth.

When displaying this reduced character on a CRT, the relationship between rows and columns is reduced along with the size of the reduced character, rather than the conventional size.

However, even if the number of characters that can be displayed on the entire screen increases, most programming languages have meaning on a line-by-line basis, so increasing the number of characters that can be displayed on one line has no meaning. We decided to compensate for this increase not by increasing the number of characters, but by increasing the number of lines. Therefore, as shown in FIG. 3, one screen was divided vertically into two, and the program source was displayed in two columns. In the figure, there are 60 lines in the vertical direction and 160 columns in the horizontal direction.

Such reduction of alphabetic characters and creation of specific patterns of kanji characters can be realized as image processing by software.

This can also be achieved through keyboard input support.

The two columns disclosed in FIG.
Based on this information, editing processing such as adding, deleting, and correcting processing steps is performed. This editing process is performed by the editor via the keyboard.

Furthermore, editing may require scrolling (updating pages or lines). FIG. 4 shows an example of upward scrolling. Since the rows are continuous in the first and second columns, this scrolling can be achieved by operating the keyboard.

An embodiment of the screen editing device of the present invention is shown in FIG.

The screen editing device includes a keyboard 1, CPU 2, text buffer 3, and graphic video RAM (VRAM) 4.
, a display control device 5, a CRT 6, a memory 7, and a reduced font buffer 8.

The CPU 2 performs processing and overall operation management. memory 7
consists of a microprogram for processing and a RAM capable of storing various data. The keyboard 1 is operated by an editor and performs various operation commands and various inputs.

The text buffer 3 stores characters to be displayed. VRAM4 stores graphic display data.

The reduced font buffer 8 stores reduced character patterns.

The display control device 5 receives the display data from the OR gate 9 and converts it into a video signal. The CRT 6 receives and displays this video signal.

The operation in the normal editing mode and the operation in the reduction mode by character reduction will be explained separately.

(1) Original operation in normal mode.

In this operation, the program source that is older than the keyboard 1 is stored in the memory 7 by the CRT 2, corrected,
Subject to editing processing such as insertion and deletion. After completing this editing process, the data to be displayed is transferred to the text buffer 3. On the other hand, predetermined graphic data is stored in the graphic VRAM 4.

Therefore, the data to be displayed are the text data in the text buffer 3 and the graphic data in the VRAMJ. When displaying both in an overlapping manner, the text buffer 3 and VRAM 4 are accessed, data is read from both, and the data is displayed in an overlapping manner on the CRT 6 via the display control device M5.

To display only one side, ≠ Text buffer 3 must be set to VRA.
M4 accesses the corresponding memory, reads it out via OR gate "9, and displays it on the CRT6. In addition to accessing one, for example, clear the contents of VRAM4, Even if 3 and 4 are read, only the contents of the memory 3 are actually read out, and only the contents of the memory 3 are displayed.

(2) Operation under reduction mode due to character reduction.

When editing the entire program source, it is necessary to perform character reduction operations. The operating procedure for character reduction is as follows. First, the contents of the text buffer 3 are made blank to erase the display of characters in the normal mode.

Next, the program source stored in the memory 7 is read, and the corresponding reduced character font is accessed from the reduced character font buffer 8. This access reads the corresponding reduced character font. The read reduced character font is written to VRAM4. Repeat the above operation for i previous screen to display 80 digits x 60 digits x 2 columns of characters.

Key manual and 1 editing processing is performed in the memory 7 in the same way as in the normal editing mode, and a reduced display is performed when displaying the results, so editing operations are no different in the reduced display mode than in the normal mode. do not have.

Since it is virtually impossible to display kanji characters in the 6×4 dots in the reduced mode, the kanji characters in the program source are replaced with a specific pattern in which the inside of the rectangle is filled with black in the form of a single small rectangle.

However, to edit kanji, switch back to normal editing mode. In this case, in order to display, the VRAM 4 may be erased, the contents of the memory 7 may be transferred to the text buffer 3, and normal characters may be displayed again.

According to the above operation, by displaying the program source in two vertical columns on the graphic screen using the reduced character font, it is possible to display five times the number of characters on one screen as normally displayed, and the editing of the program source is improved. will improve.

In this example, in order to make the reduced characters easier to see,
Although a specific dedicated font was used, instead of this dedicated font, it is also possible to thin out the normal 16 x 8 dot character font. In this case, the shape of the characters will be poor, but the reduced characters Font buffer (in this example,
It has the advantage of not requiring 6x4x256/s = 768 bytes).

Other embodiments of the invention will be described below.

In the embodiment described above, the number of displayed characters was increased by reducing the size of the characters to about 1/5, but consider further reduction to about 1/1°. In this case, one character becomes 4x3 dots, which is completely impossible to recognize as a character. Therefore, all characters are replaced with a specific pattern in which the inside of the rectangle is colored black. Instead, it just tells you how many characters are on each line. However, since this is inconvenient as it is, for the line of interest, move the cursor to that position and display only the line where the cursor is currently located in a position where it is easy to see on the screen, such as the bottom line, in normal font size. Furthermore, the reason why you need a large screen to edit program sources is because you want to see specific processing. For example, B
In the case of ASIC, this is a flow such as a GOTO statement or a FOR-NEXT statement.

Here, the GOTO statement is a statement that has a so-called jump instruction. The FOR-NEXT statement is a statement that repeats between FOR and NEXT a specified number of times.

In order to view such specific statements, a program flow display will be added with an arrow corresponding to the programming language. An example of this is shown in FIG.

FIG. 7 shows an embodiment for realizing the display shown in FIG. 6, and FIG. 8 shows its processing flow. 7 is the same as FIG. 5 except that the reduced character font buffer 8 is removed.

In FIG. 7, the program source input from the keyboard 1 is stored in the memory 7 by the CPU 2, and subjected to editing processing such as correction and deletion. After the editing process, the data on the line where the cursor is currently located is transferred to the text buffer 3, and the data to be displayed, including the line where the cursor is currently located, is written into the VRAM 4 with one character corresponding to one symbol. After this, the text and graphics are displayed simultaneously.

Since the dots for one character are 4 x 3, if 80 digits x 2 columns are allocated to the character display, each column will have an area of 80 dots, so arrows indicating the program flow are displayed here (Figure 6).

The processing flow shown in FIG. 8 will be explained.

First, in step 10, a pointer is set at the beginning of the program source. FOR,G in step 11.

Clears the TO flag. In step 12, one line in the memory 7 pointed to by the pointer is read. When the line follows GOTO, display a vertical line (steps 13 and 17), and when it is the label ahead of GOTO (step 14),
Display the destination symbol of GOTO (step 15)
The O graph is decremented by 1 to clear one GOTO nesting (step 16).

If the line follows FOR (step 18), a vertical line will be displayed (step 22), if it is NEXT (step 19)
In step 20), the FOR destination number should be displayed.
Set the R flag to -1 (step 21), and execute FOR-NEX.
Clear one nesting of T.

When using a FOR statement (step 23), set the FOR flag to +
1 and memorize it (step 24), and display the start symbol of the FOR statement (step 25).

In the case of the 0070 statement (step 26), if the destination of the GOTO (step 27) is 11 points after the currently read line, the destination label position is memorized (step 28).
Remove OTO7 lag (step 29) and store in GOTO range. Then, display the GOTO start signal (
Step 30).

When the GOTO destination is ahead of the current lead line,
If that line is currently displayed (step 31), G
The OTO destination symbol is displayed (step 32), and a vertical line is displayed up to the 0070 sentence (step 33). If the destination of the GOTO is not currently displayed, press G from the top of the screen.
A vertical line is displayed up to the OTO (step 34). still,
In FIG. 7, the umbrella section is displayed only when the current line is being displayed.

Repeat the above process to search until the last line currently displayed on the screen and display the program flow.

As described above, by combining the normal character display for one line and the compressed display in which characters are symbolized, the number of program source lines that can be displayed on one screen is increased, and the function to detect and display the syntax of the program source is also added. By adding this, it is now possible to edit the screen with improved editability of the program source, which has a strong relation to the previous and subsequent parts.

〔Effect of the invention〕

According to the present invention, 5 to 10 times the number of characters normally displayed can be temporarily displayed on one screen without changing the hardware, so when editing a program source, first make a list on paper and then use it. The need to edit while viewing is reduced, and the work can be done only by editing on the screen, which improves program source editing work.

[Brief explanation of drawings]

Figure 1 is a diagram showing the dot configuration of kanji and alphabetic characters, Figure 2 is a diagram showing the dot configuration of reduced characters, Figure 3 is a display example of reduced characters displayed according to the present invention, and Figure 4 is a diagram showing the dot configuration of reduced characters. FIG. 5 is a diagram showing an embodiment of an editing device implementing the present invention, FIG. 6 is a diagram showing another embodiment of the present invention, and FIG. 7 is a diagram showing another implementation of an editing device implementing the present invention. The example diagram, FIG. 8, is a processing flow diagram. 1...Keyboard, 2...CPU, 3...Text bus sofa, 4...Graphic VRAM. Figure 1 (A) (B) - Figure 2 Figure 3 Figure 4 Figure 5 - Figure 6

Claims (1)

[Claims] 1. A memory for storing program sources, a keyboard for supporting reduction of the program sources, and a CRT for displaying program sources reduced in accordance with the reduction support.
A screen editing device consisting of. 2. A screen editing device comprising a memory for storing a program source, a keyboard for supporting reduction of the program source, and a CRT for displaying the same display pattern corresponding to each reduced character of the program source. 3. The screen display device according to claim 2, wherein the CRT also displays a display indicating the relationship of only specific sentences in the program source.