Question

使用这样的语法......

[[File:foo.pdf]]

...可以引用MediaWiki页面中的文件。在这种情况下，将从第一个PDF页面生成缩略图，并在页面的渲染视图中显示。

我的问题是：如何阻止生成此缩略图并显示一些PDF特定图标？（所有PDF文件的单个图标？）

Answer 1

您可以通过添加冒号来阻止显示缩略图，只需将其作为文件的链接：

[[:File:foo.pdf]]

然而，你不会得到任何图标。

要用图标替换它，您需要指定要使用的图标。例如，如果您启用了Instant Commons：

[[File:Document-pdf.svg|25px|link=foo.pdf]]

要将其用于所有文件，我建议将其包装在模板中，以便您可以使用{{PDF|foo.pdf}}进行调用。创建包含以下内容的Template:PDF：

[[File:Document-pdf.svg|25px|link={[[File:Document-pdf.svg|25px|link={N = input("How many inputs: ")
a = []
for _ in xrange(N):
    a.append(input("Enter value for flux: "))
}]] [[:File:{ByteBuffer}|{package nl.owlstead.stackoverflow;

import java.nio.BufferOverflowException;
import java.nio.ByteBuffer;

/**
 * Helper class to create telephone numbers with headers for Java card using
 * reverse packed BCD format.
 * 
 * @param buffer
 *            a buffer with enough space for the 3 byte header
 */
public final class OverlyDesignedTelephoneNumberHelper {

    private static final int TELEPHONE_NUMBER_SIZE = 10;
    private static final int NIBBLE_SIZE = 4;
    private static final byte[] HEADER = { (byte) 0x0C, (byte) 0x91,
            (byte) 0x19 };

    /**
     * Adds the header for the telephone number to the given buffer.
     * 
     * @param buffer
     *            a buffer with enough space for the 3 byte header
     * @throws NullPointerException
     *             if the buffer is null
     * @throws BufferOverflowException
     *             if the buffer doesn't have enough space for the header
     */
    private static void addTelephoneNumberHeader(final ByteBuffer buffer) {
        buffer.put(HEADER);
    }

    /**
     * Adds the telephone number to the given buffer.
     * 
     * @param buffer
     *            a buffer with enough space for the 3 byte header
     * @param number
     *            the number in BCD format, should be 10 bytes in size
     * @throws IllegalArgumentException
     *             if the number is null or doesn't contain 10 BCD digits
     * @throws NullPointerException
     *             if the buffer is null
     * @throws BufferOverflowException
     *             if the buffer doesn't have enough space for the telephone
     *             number
     */
    private static void addTelephoneNumber(final ByteBuffer buffer,
            final byte[] number) {
        if (number == null || number.length != TELEPHONE_NUMBER_SIZE) {
            throw new IllegalArgumentException("Expecting 10 digit number");
        }

        for (int i = 0; i < number.length; i += 2) {
            final byte lowDigit = number[i];
            validateUnpackedBCDDigit(lowDigit);
            final byte highDigit = number[i + 1];
            validateUnpackedBCDDigit(highDigit);

            buffer.put((byte) ((highDigit << NIBBLE_SIZE) | lowDigit));
        }
    }

    /**
     * Tests if the given unpacked BCD digit is within range.
     * 
     * @param b
     *            the byte to test
     * @throws IllegalArgumentException
     *             if it isn't
     */
    private static void validateUnpackedBCDDigit(final byte b) {
        if (b < 0 || b > 9) {
            throw new IllegalArgumentException(
                    "Telefonenumber isn't all bytes representing digits in BCD");
        }
    }

    public static void main(final String... args) {
        final byte[] number = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 5 };

        final ByteBuffer buf = ByteBuffer.allocate(HEADER.length
                + TELEPHONE_NUMBER_SIZE);
        addTelephoneNumberHeader(buf);
        addTelephoneNumber(buf, number);
        buf.flip();
        while (buf.hasRemaining()) {
            System.out.printf("%02X", buf.get());
        }
        System.out.println();
    }

    private OverlyDesignedTelephoneNumberHelper() {
        // avoid instantiation
    }
}
}]]
}]]

这样，如果你想要，你也可以显示文件名：

import { Response, ResponseOptions, ResponseType, Request } from '@angular/http';
import { MockConnection } from '@angular/http/testing';

class MockError extends Response implements Error {
    name:any
    message:any
}

...
handleConnection(connection:MockConnection) {
    let body = JSON.stringify({key:'val'});
    let opts = {type:ResponseType.Error, status:404, body: body};
    let responseOpts = new ResponseOptions(opts);
    connection.mockError(new MockError(responseOpts));
}

如果我链接到Media Wiki中的内部PDF文件，我该如何防止缩略图显示？

1 个答案: