janishutz-legacy/impress.js
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Auto guess slide title from first non-blank line (#821)

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* Auto guess slide title from first non-blank line
* If line content is too long, trim to the first 40 bytes
This commit is contained in:
thawk
2022-10-17 08:39:54 +08:00
committed by GitHub
parent 0d52faa60d
commit b572362c3a
2 changed files with 56 additions and 2 deletions
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29
js/impress.js
View File

@@ -3952,6 +3952,33 @@
return tempDiv.firstChild;
};
var getStepTitle = function( step ) {
// Max length for title.
// Line longer than this will be cutted.
const MAX_TITLE_LEN = 40;
if ( step.title ) {
return step.title;
}
// Neither title nor id is defined
if ( step.id.startsWith( 'step-' ) ) {
for ( var line of step.innerText.split( '\n' ) ) {
line = line.trim( );
if ( line.length > 0 ) {
if ( line.length <= MAX_TITLE_LEN ) {
return line;
} else {
return line.slice( 0, MAX_TITLE_LEN - 3 ) + '...';
}
}
}
}
return step.id;
};
var selectOptionsHtml = function() {
var options = '';
for ( var i = 0; i < steps.length; i++ ) {
@@ -3960,7 +3987,7 @@
if ( hideSteps.indexOf( steps[ i ] ) < 0 ) {
options = options + '<option value="' + steps[ i ].id + '">' + // jshint ignore:line
(
steps[ i ].title ? steps[ i ].title : steps[ i ].id
getStepTitle( steps[ i ] )
) + '</option>' + '\n';
}
}

29
src/plugins/navigation-ui/navigation-ui.js
View File

@@ -38,6 +38,33 @@
return tempDiv.firstChild;
};
var getStepTitle = function( step ) {
// Max length for title.
// Line longer than this will be cutted.
const MAX_TITLE_LEN = 40;
if ( step.title ) {
return step.title;
}
// Neither title nor id is defined
if ( step.id.startsWith( 'step-' ) ) {
for ( var line of step.innerText.split( '\n' ) ) {
line = line.trim( );
if ( line.length > 0 ) {
if ( line.length <= MAX_TITLE_LEN ) {
return line;
} else {
return line.slice( 0, MAX_TITLE_LEN - 3 ) + '...';
}
}
}
}
return step.id;
};
var selectOptionsHtml = function() {
var options = '';
for ( var i = 0; i < steps.length; i++ ) {
@@ -46,7 +73,7 @@
if ( hideSteps.indexOf( steps[ i ] ) < 0 ) {
options = options + '<option value="' + steps[ i ].id + '">' + // jshint ignore:line
(
steps[ i ].title ? steps[ i ].title : steps[ i ].id
getStepTitle( steps[ i ] )
) + '</option>' + '\n';
}
}