JPS59180738A - Character display device - Google Patents

Abstract

PURPOSE:To easily discriminate the ''depth'' of each area, by changing the color of a character of block starting point display and block ending point display. CONSTITUTION:When a block sentence is inputted into an interface section D1, a block boundary display detecting section D9 successively receives real characters to be displayed from a character string processing section D2 in the form of character codes D8 and compares and detects them whether or not characters ''('' and '')'' representing the boundary of a block are contained in the character codes D8. When a character code D8 is the one for representing the block boundary, the detecting section D9 outputs a color change signal D11 to a display driving section D3 so as to change the color of the character only. When the character ''('' when representing the starting point is detected, sends a block starting point detect signal D12, and when a block ending point is detected, sends a block ending point detect signal D13'')'' to the counting section D10 and adds (+1) or (-1) to the counting section D10 whenever the signals D12 and D13 are sent to the counting section D10. The counting section D10 outputs the added results to the display driving section D3 as color codes D14.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a device such as a computer terminal or a word processor that (edit) and displays documents such as a program list.
This invention relates to a device that facilitates understanding of the structure of program statements in a device that can be displayed in brown color.

[Prior art and its problems]

For example, when creating a program using the programming language rLispJ, which is one of the so-called structured languages, the program includes statements or collections of statements (these are blocks or modules) that can be distinguished by their collective functions or partial functions. A left parenthesis (hereinafter referred to simply as a character) as a special character that indicates the start point of a block (hereinafter referred to as the block start point) (also referred to as "("), which also indicates the end point of a block (hereinafter referred to as the block end point) A structure ending with a right-hand parenthesis (hereinafter referred to simply as a character) ")" appears multiple times. This often results in a very complex female form, for example in the program shown in Figure 1.

Those who write programs often hear the characters ``('' and ``)'' in strange voices.
This was extremely inconvenient in that it was easy to make mistakes if you were not always aware of how many of each you entered. To alleviate this problem, a technique called indenting is often used. This means that the character "(" counts +IK,
The character ")" is counted as -1, and depending on the number of the character "(", a new line is created and the column position (column position) is aligned to make it easier for programmers to see. This is done thoroughly. However, many line breaks occur, making it difficult to see, so a number of methods have been devised to help with this.

Figure 2 is a redrawn version of Figure 1 by incorporating the step-by-step method. Although this is easier to see than Figure 1, the right half of the program is blank in the first half, and the left half is blank in the second half, which is very inefficient. For display devices with a limited number of display characters, such as CRTs, liquid crystal panels, and plasma display panels,
Poor display efficiency is a serious performance defect. Also, the last string of characters in the program "))...))" is
Again, the programmer must be careful not to make a mistake in counting, which is inconvenient as in Figure 1.

The above explanation has been given using the programming language Li5p as an example, but this is also a so-called structured programming language such as AI gol and Pa5eal, which have recently made it easier to understand the program structure using a block structure.

3- PL/1 (and its derivatives, RATFOR, PL/M
) etc. are common features.

Instead of the character "(" indicating the start of a block,
An example of a word that indicates the starting point of a block is ``jbegi hat''.
DO”, or at the beginning of a procedural statement “PR, -0CEDU
REJ etc. are used, and words indicating the block end point, such as rebdJ, are used instead of the character ")" indicating the block end point, but the "depth" corresponding to these words in the block is When using the step-by-step method, programmers must be careful not to make mistakes.
Although it provides some visibility, it is exactly the same in that the display efficiency deteriorates.

FIG. 3 shows a conventional display device for the programming language, where Dl is an interface part into which a character string to be displayed is inputted from an external source, such as a keyboard, computer, or transmission line, and D5 is an interface part that is received by the interface part D1. This is the transmission character string obtained by removing the control signals and control codes for the transmission procedure from the character string. In addition, the character string processing unit D2 receives the transmitted character string D54-, and generates control characters for controlling the screen of the display unit D4 via the display driving unit D3, such as line feed, tab, character, erasure, screen erasure, etc. After separating the net characters to be displayed, a control signal D61 obtained by converting the control characters and an internal character code D6 obtained by converting the characters to be displayed into a format compatible with the display drive unit D3 are output. do. Further, D4 is a display section such as a CR, 'I', or plasma display, and a display driving section D3 synthesizes a display signal D7 suitable for the display section D4 and drives the display section D4.

[Purpose of the invention]

The present invention relates to a device in general whose purpose is to (edit) and display a program written in a structured programming language.
The above-mentioned points have been improved and the display screen can be used more efficiently.
A display device that makes it possible to manage the "depth 1" determined corresponding to the paired characters or words by detecting the word rI)eginJ and the word trebJ, etc., without requiring the effort of the programmer. or to provide an information processing device 5-.

[Key points of the invention]

The present invention uses the character "(" or the word jbeginJ, etc., which indicates the block start point from among the characters (sequence) to be displayed (hereinafter, these characters or words are collectively referred to as block start point display) and the block end point. The character ")" or the word "e\d" (hereinafter, these characters and words are collectively referred to as the block end point display) is detected, and if the block start point display is detected, the counter is incremented by 1 to indicate the end of the block. In the case of point display, the counter is decremented by 1, and then the characters (words) of the block start point display and block end point display (hereinafter these displays are collectively referred to as block boundary display) are set according to the value of the counter. "Change the color of"
This makes it easier to determine the depth.

[Embodiments of the invention]

FIG. 4 shows an example of the configuration of a display device embodying the present invention. In FIG. 4, the same reference numerals as in FIG. 3 indicate the same or corresponding parts. Describing the differences with Fig. 3, if the program statement in Fig. 1 (or Fig. 2) is input to the interface section D1, the block boundary display (block start point display and block The block boundary display detection unit D9 that detects the end point display) sequentially receives the net characters to be displayed from the character string processing unit D2 in the form of a character code D8, and the character code DB is the block boundary display. Compare and detect whether or not the character ``('' or the character ``)'' appears. If the block start point detection signal D]2 which is the character "(" or the character ")" is
)" is detected, the block end point detection signal D13
is sent to the depth counting unit DIO. When the depth counting unit DIO receives the block start point detection signal D12, it increments an internal counter by 1, and then calculates that value (referred to as "depth". However, from the value of the counter, it can also be called "height"). However, according to customary practice, the color designation code D14 is output to the display drive unit D3. Also, block end point detection signal D
13 is received, the color specification code D14 is output once so that the character "(" and the character ")" in the block boundary display that should be paired have the same color designation, and then the internal counter is output. -1 value. However, for example, if the initial value of the counter is set to 1-1, and the value of the color specification code D14 is 0, that is, the character ``('' that comes at the beginning of the program), it is easy to distinguish. Therefore, the character "(
If you set it to be the same color as a string of general characters (called internal characters) other than ``'' or the character ``)'', you can save one color type.

In this way, the display drive unit D3 can display the characters "(" and "
)", it operates in exactly the same way as a conventional display device, and only when the character "(" or character ")" is detected, the character "(" or character ")" is displayed in the color indicated by the color specification code D14. letter"
)'' is displayed on the display section D4. (For example, if the display section D4 is a color CRT, the display signal D7 will be a color video signal). In the manner described above, for ease of understanding, for example, if a program corresponding to the arrangement shown in FIG. 2 is displayed, the result will be as shown in FIG. 5.

Furthermore, in the case of Fig. 5, when the initial value of the counter in the depth counter DIO is set to -1, the change in the value of the counter (therefore the change in "depth") when each block boundary display is detected is calculated as follows: It is shown in Fig. 6. In Fig. 6, the circled numerical value is the color designation code D14 corresponding to the block boundary display.
, and represents "depth".

Now, in Figure 5, the letter r (
jla, 2a...19a and the character r) Jib, 2b...19b, which is the block end point display, are respectively (l
a and lb), (2a and 2 b), .

For each combination of (19a and 19b), the same color designation is made for the block boundary display of each pair that corresponds to the same one depth'', as can be seen from FIG.

All 9- characters (words) including the block boundary display in the area bounded by each closed dashed-dotted line in FIG. 5 correspond to the same "depth", and the dashed-dotted line is It can be likened to contour lines.

In order to prevent errors in understanding the program structure, it is desirable that the above color specification be different for all six depths, but at least it should be different from the color of the adjacent "depth". It is specified to be a color.

〔Effect of the invention〕

In this way, the programmer can instantly and easily understand the "depth" of each area having characters "(" and ")" of the same color at both ends, depending on the color. For example, in the last part of the program, it is sufficient to input the characters ")" until the color of the characters ")" returns to the color of the book (this is the same color as the internal characters, that is, the general characters).

For the above reasons, it is clear that even if the present invention is applied to a program corresponding to the layout shown in FIG. Displays like a moving vehicle.

10- It is possible to prevent a decrease in

As detailed above, according to the present invention, it is possible to easily understand, edit, check, etc. of a program by simple means without reducing the efficiency of use of the siprogram display surface.
This greatly contributes to improving program productivity and reliability.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing display examples of conventional programs;
Figure 3 is a block diagram showing the configuration of a conventional display device;
The figure is a block diagram showing the configuration of the display device of the present invention, and FIGS. 5 and 6 are explanatory diagrams of program display of the present invention. Description of symbols D9...Block boundary display detection unit, Dlo...Depth counting unit, Dll...Color change signal, D12...Block start point detection signal, D13...Block end point detection signal, D14 ...Color specification code. (c+EFuNFETCH-VALUE (x 5UB
ST ) (C0ND ((VAR?X)(PROG
(V) (SETQ V (ASSOCX(CDR5
UBST )))(COND ((NULL V)
(RETURN
ETCH-VALLIE (SECONCI V)
(CDDRv))))>))))) Fang 1 Figure (DEFUN FETCH-VALUE (XSU
BST)(COND((MAR?X)(PR
OG (V) (SETQ v (ASSOCx (CDR5UBST
)))(COND ((NULL V )(RETU
RN

Claims (1)

[Claims] A character display device capable of displaying a structured program statement in multiple colors, comprising means for detecting characters or words indicating the start and end points of a block in the program statement, and each time a character or word indicating the start point appears. At least one counting means is provided for adding up the number of times and subtracting the number of times each time a character or word indicating the end point appears, and depending on the counted value, the character or word corresponding to the same depth of the block is A character display device characterized in that words are displayed in the same color, and the display color is different from at least a display color corresponding to an adjacent depth.