Adding blocks in editor
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define commands to add a header, code block or paragraph block after the current slide
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when reading again
hx will merge continuous paragraphs into one block
2
@Add(global elements)
void add_block(Read_State state) {
@put(add block);
}
@End(global elements);
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the
add_block function adds a new block after the current block
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it sets its value to a default text
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and makes the new block the current block
3
@Add(run loop)
if (cmd == "h" || cmd == "header") {
add_block(RS::header);
continue;
}
@End(run loop)
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generates a new header block
4
@Add(run loop)
if (cmd == "c" || cmd == "code") {
add_block(RS::code);
continue;
}
@End(run loop)
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generates a new code block
5
@Add(run loop)
if (cmd == "o" || cmd == "other") {
add_block(RS::para);
continue;
}
@End(run loop)
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generates a new paragraph blocks
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multiple paragraph blocks will be merged into one paragraph block on read
6
@def(add block)
if (curInput != inputs.end()) {
@put(increase block);
int i = curBlock - curInput->second.blocks.begin();
@put(insert block);
curBlock = curInput->second.blocks.begin() + i;
} else {
std::cerr << "! no file\n";
}
draw_block();
@end(add block)
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add_block increases the current block if possible
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so it can insert the new block before the iterator
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as the insert can invalidate the iterators, it saves the distance
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and restores it afterwards
7
@def(increase block)
if (curBlock != curInput->second.blocks.end()) {
++curBlock;
}
@end(increase block)
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add_block does not advance beyond the end of the container
8
@def(insert block)
curInput->second.blocks.insert(curBlock, {
state, { "REPLACE" }, {},
state == RS::header ? 1 : 0
});
@end(insert block)
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add_block creates a new block with the requested state
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and a default text
Duplicating the current block
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duplicates the current block
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and sets the current block to the new copy
10
@Add(run loop)
if (cmd == "d" || cmd == "dup") {
if (curInput != inputs.end()) {
if (curBlock != curInput->second.blocks.end()) {
@put(duplicate);
}
} else {
std::cerr << "! no file\n";
}
continue;
}
@End(run loop)
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duplicates the current block
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if the file is valid
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and the current block is valid
11
@def(duplicate)
int i = curBlock - curInput->second.blocks.begin();
curInput->second.blocks.insert(curBlock, *curBlock);
curBlock = curInput->second.blocks.begin() + i + 1;
@end(duplicate)
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the insert invalidates the iterator
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so the offset is saved
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a copy of the current block is inserted before the current block
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that is the wrong way around but easier
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and doesn't matter in the end
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the new current block is set to the old current block
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which is now the second of the two duplicates