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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              @import url('https://fonts.googleapis.com/css?family=Roboto:400,500|Roboto+Mono:400,500');

*,
*::after,
*::before {
  box-sizing: inherit;
}

html {
  box-sizing: border-box;
  font-size: 16px;
}

body {
  margin: 0;
  padding: 0;
  background: #fff;
  line-height: 1;
  font-family: 'Roboto', sans-serif;
  font-weight: 400;
  font-size: 1rem;
  color: #000;
}

            
          
!
            
              const {render} = ReactDOM;
const {Component, PropTypes} = React;
const {h1, h2, div, input, textarea, a, svg, g, line, text} = styled.default;
const {darken, lighten, transparentize} = polished;
const {grid, template} = GridTemplateParser;

// helpers
const clamp = (value, min, max) => Math.min(Math.max(value, min), max);

// styles
const colors = {
  primary: '#263238',
  secondary: '#1DE9B6',
};

const StyledApp = div`
  display: grid;
  grid-template-columns: 25rem auto;
  grid-template-rows: auto;
  grid-template-areas: "sidebar main";
  width: 100%;
  height: 100vh;
`;

const StyledSidebar = div`
  display: flex;
  flex-direction: column;
  grid-area: sidebar;
  background: ${darken(.1, colors.primary)};
  overflow: hidden;
`;

const StyledMain = div`
  display: flex;
  flex-direction: column;
  grid-area: main;
  padding: 2rem;
  background: ${darken(.05, colors.primary)};
`;

const StyledMainInner = div`
  flex: 1;
  position: relative;
`;

const StyledGrid = svg`
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
`;

const StyledGridText = text`
  font-family: 'Roboto Mono', monospace;
  font-weight: 500;
  font-size: 1rem;
  text-anchor: middle;
  alignment-baseline: middle;
  fill: ${transparentize(.75, colors.secondary)};
`;

const StyledGridLine = line`
  stroke: ${darken(.01, colors.primary)};
  stroke-width: 1px;
`;

const StyledPreview = div`
  z-index: 5;
  position: relative;
  display: grid;
  grid-template-columns: repeat(${props => props.width}, 1fr);
  grid-template-rows: repeat(${props => props.height}, 1fr);
  grid-template-areas: ${props => props.tpl};
  width: 100%;
  height: 100%;
`;

const StyledTrack = div`
  position: relative;
  grid-area: ${props => props.area};
  cursor: ${props =>
    props.grabbing ? 'grabbing' : 'grab'};
  background: ${transparentize(.97, colors.secondary)};
`;

const StyledHandler = div`
  position: absolute;
  top: ${({position}) =>
    position === 'bottom' ? 'auto' : 0};
  right: ${({position}) =>
    position === 'left' ? 'auto' : 0};
  bottom: ${({position}) =>
    position === 'top' ? 'auto' : 0};
  left: ${({position}) =>
    position === 'right' ? 'auto' : 0};
  width: ${({position, size}) =>
    position === 'left' || position === 'right' ? size : '100%'};
  height: ${({position, size}) =>
    position === 'top' || position === 'bottom' ? size : '100%'};
  cursor: ${({position}) =>
    position === 'left' || position === 'right' ? 'col-resize' : 'row-resize'};
  background: ${colors.secondary};
`;

const StyledHint = div`
  padding: 2rem;
`;

const StyledHintTitle = h1`
  padding-bottom: 1rem;
  font-weight: 500;
  font-size: 1.5rem;
  color: ${colors.secondary};
`;

const StyledHintDescription = div`
  line-height: 1.6;
  font-size: 1rem;
  color: ${lighten(.6, colors.primary)};
`;

const StyledTemplate = div`
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 2rem;
`;

const StyledTemplateTitle = h2`
  padding-bottom: 1.5rem;
  text-transform: uppercase;
  font-size: .85rem;
  font-weight: 500;
  color: ${colors.secondary};
  letter-spacing: .1rem;
`;

const StyledTemplateControl = div`
  flex: 1;
`;

const StyledTemplateInput = textarea`
  width: 100%;
  height: 100%;
  padding: 2rem;
  background: ${darken(.125, colors.primary)};
  border-radius: 2px;
  border: none;
  resize: none;
  line-height: 1.5;
  font-family: 'Roboto Mono', monospace;
  font-size: .85rem;
  color: #fff;
  transition: background .2s;

  &:focus {
    outline: 0;
    background: ${darken(.15, colors.primary)};
  }
`;

const StyledSettings = div`
  display: flex;
  align-items: center;
  justify-content: center;
  padding-bottom: 2rem;

  &::before,
  &::after {
    content: '';
    flex: 1;
    display: block;
    height: 1px;
    background: ${colors.primary};
  }
`;

const StyledSettingDivider = div`
  text-align: center;
  font-family: 'Roboto Mono';
  font-weight: 500;
  font-size: 1.05rem;
  color: ${lighten(.05, colors.primary)};
`;

const StyledSettingInput = input`
  width: 4rem;
  padding: .4rem .6rem;
  margin: 0 .75rem;
  background: ${darken(.1, colors.primary)};
  border: none;
  border-radius: 2px;
  text-align: center;
  font-family: 'Roboto Mono';
  font-size: .8rem;
  color: #fff;
  transition: background .2s;

  &:focus {
    outline: 0;
    background: ${darken(.125, colors.primary)};
  }
`;

const StyledFoot = div`
  padding: 0 2rem 2rem;
`;

const StyledLink = a`
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-weight: 500;
  font-size: .8rem;
  color: ${colors.secondary};
  transition: color .2s;

  &:hover {
    color: #fff;
  }
  &::before,
  &::after {
    content: '';
    flex: 1;
    display: block;
    height: 1px;
    background: ${colors.primary};
  }
  &::before {
    margin-right: .75rem;
  }
  &::after {
    margin-left: .75rem;
  }
`;

function Sidebar(props) {
  return (
    <StyledSidebar>
      <Hint />
      <Template {...props} />
      <Foot />
    </StyledSidebar>
  );
}

function Hint() {
  return (
    <StyledHint>
      <StyledHintTitle>
        CSS Grid Template Builder
      </StyledHintTitle>
      <StyledHintDescription>
        A simple tool to build complex CSS Grid templates.
        Edit the template string below or drag the areas in the preview.
        The changes will reflect in both sides.
      </StyledHintDescription>
    </StyledHint>
  );
}

function Foot() {
  return (
    <StyledFoot>
      <StyledLink href="https://twitter.com/a_dugois" target="_blank">
        Follow me on Twitter!
      </StyledLink>
    </StyledFoot>
  );
}

function Template({tpl, setTracks}) {
  return (
    <StyledTemplate>
      <StyledTemplateTitle>
        Template areas
      </StyledTemplateTitle>
      <StyledTemplateControl>
        <Text value={tpl} onBlur={setTracks}>
          {props => <StyledTemplateInput {...props} />}
        </Text>
      </StyledTemplateControl>
    </StyledTemplate>
  );
}

function Main({tpl, width, height, areas, setArea, setWidth, setHeight}) {
  return (
    <StyledMain>
      <Settings
        width={width}
        height={height}
        setWidth={setWidth}
        setHeight={setHeight} />
      <StyledMainInner>
        <Grid
          width={width}
          height={height}
          areas={areas} />
        <Preview
          tpl={tpl}
          width={width}
          height={height}
          areas={areas}
          setArea={setArea} />
      </StyledMainInner>
    </StyledMain>
  );
}

function Settings({width, height, setWidth, setHeight}) {
  return (
    <StyledSettings>
      <Text value={width} onBlur={setWidth}>
        {props => <StyledSettingInput {...props} />}
      </Text>
      <StyledSettingDivider>x</StyledSettingDivider>
      <Text value={height} onBlur={setHeight}>
        {props => <StyledSettingInput {...props} />}
      </Text>
    </StyledSettings>
  );
}

function Track({area, column, row, grabbing, onMouseDown, onHandlerMouseDown}) {
  return (
    <StyledTrack
      area={area}
      grabbing={grabbing}
      onMouseDown={onMouseDown}>
      <Handler position="top" onMouseDown={onHandlerMouseDown('top')} />
      <Handler position="right" onMouseDown={onHandlerMouseDown('right')} />
      <Handler position="bottom" onMouseDown={onHandlerMouseDown('bottom')} />
      <Handler position="left" onMouseDown={onHandlerMouseDown('left')} />
    </StyledTrack>
  );
}

function Handler({position, onMouseDown}) {
  return (
    <StyledHandler
      size="6px"
      position={position}
      onMouseDown={onMouseDown} />
  );
}

class App extends Component {
  state = {
    tracks: {
      width: 4,
      height: 6,
      areas: {
        head: {
          column: { start: 1, end: 5, span: 4 },
          row: { start: 1, end: 2, span: 1 },
        },
        aside: {
          column: { start: 1, end: 2, span: 1 },
          row: { start: 2, end: 4, span: 2 },
        },
        main: {
          column: { start: 2, end: 5, span: 3 },
          row: { start: 2, end: 6, span: 4 },
        },
        foot: {
          column: { start: 1, end: 5, span: 4 },
          row: { start: 6, end: 7, span: 1 },
        },
      },
    },
  };

  setTracks = evt => {
    this.setState(() => ({tracks: grid(evt.target.value)}));
  };

  integer = (value, previous, min, max) => {
    const int = parseInt(value);
    const safe = isNaN(int) ? previous : clamp(int, min, max);
    
    return safe;
  };

  setWidth = evt => {
    this.setState(({tracks}) => ({
      tracks: {
        ...tracks,
        width: this.integer(evt.target.value, tracks.width, 1, 100),
      },
    }));
  };

  setHeight = evt => {
    this.setState(({tracks}) => ({
      tracks: {
        ...tracks,
        height: this.integer(evt.target.value, tracks.height, 1, 100),
      },
    }));
  };

  setArea = (key, value) => {
    this.setState(({tracks}) => ({
      tracks: {
        ...tracks,
        areas: {
          ...tracks.areas,
          [key]: value,
        },
      },
    }));
  };

  render() {
    const {tracks} = this.state;
    const {width, height, areas} = tracks;
    const tpl = template(tracks);

    return (
      <StyledApp>
        <Sidebar
          tpl={tpl}
          setTracks={this.setTracks} />
        <Main
          tpl={tpl}
          width={width}
          height={height}
          areas={areas}
          setArea={this.setArea}
          setWidth={this.setWidth}
          setHeight={this.setHeight} />
      </StyledApp>
    );
  }
}

class Text extends Component {
  static defaultProps = {
    value: '',
    onFocus: () => {},
    onBlur: () => {},
    onChange: () => {},
  };

  state = {
    isFocused: false,
    value: this.props.value,
  };

  componentWillReceiveProps({value}) {
    this.setState(() => ({value}));
  }

  handleFocus = evt => {
    evt.persist();
    
    this.props.onFocus(evt);
    this.setState(() => ({isFocused: true}));
  };

  handleBlur = evt => {
    evt.persist();
    
    this.props.onBlur(evt);
    this.setState(() => ({isFocused: false}));
  };

  handleChange = evt => {
    evt.persist();
    
    const {value} = evt.target;
    
    this.props.onChange(evt);
    this.setState(() => ({value}));
  };

  render() {
    const {isFocused} = this.state;
    const value = isFocused ? this.state.value : this.props.value;
    
    return this.props.children({
      value,
      onFocus: this.handleFocus,
      onBlur: this.handleBlur,
      onChange: this.handleChange,
    });
  }
}

class Preview extends Component {
  constructor() {
    super();
        
    this.dx = 0;
    this.dy = 0;
  }
  
  state = {
    isDragging: false,
    draggedArea: null,
    draggedPosition: null,
  };

  componentDidMount() {
    document.addEventListener('mouseup', this.handleMouseUp);
    document.addEventListener('mousemove', this.handleMouseMove);
  }
  
  componentWillUnmount() {
    document.removeEventListener('mouseup', this.handleMouseUp);
    document.removeEventListener('mousemove', this.handleMouseMove);
  }
  
  handleMouseUp = evt => {
    if (this.state.isDragging) {
      this.setState(() => ({
        isDragging: false,
        draggedArea: null,
        draggedPosition: null,
      }));
    }
  };
  
  handleMouseMove = evt => {
    const {width, height} = this.props;
    const {isDragging, draggedArea, draggedPosition} = this.state;
    
    if (isDragging) {
      const rect = this.node.getBoundingClientRect();     
      const x = Math.round((evt.clientX - rect.left) / rect.width * width);
      const y = Math.round((evt.clientY - rect.top) / rect.height * height);
      
      switch (true) {
        case typeof draggedPosition === 'string':
          return this.moveHandler(x, y);
        case typeof draggedArea === 'string':
          return this.moveTrack(x, y);
      }
    }
  };

  makeTrackMouseDown = draggedArea => evt => {
    evt.preventDefault();
    
    const {width, height, areas} = this.props;
    const area = areas[draggedArea];
    const rect = this.node.getBoundingClientRect();
    
    const x = Math.round((evt.clientX - rect.left) / rect.width * width);
    const y = Math.round((evt.clientY - rect.top) / rect.height * height);
    
    this.dx = x - area.column.start + 1;
    this.dy = y - area.row.start + 1;
    
    this.setState(() => ({isDragging: true, draggedArea}));
  };

  makeHandlerMouseDown = draggedArea => draggedPosition => evt => {
    evt.preventDefault();
    this.setState(() => ({isDragging: true, draggedArea, draggedPosition}));
  };

  moveTrack = (x, y) => {
    const {width, height, areas, setArea} = this.props;
    const {draggedArea} = this.state;
    const area = areas[draggedArea];
    
    const top = this.findAdjacentArea('top', draggedArea);
    const right = this.findAdjacentArea('right', draggedArea);
    const bottom = this.findAdjacentArea('bottom', draggedArea);
    const left = this.findAdjacentArea('left', draggedArea);
    
    const columnStart = clamp(
      x - this.dx + 1,
      typeof left === 'string' ? areas[left].column.end : 1,
      (typeof right === 'string' ? areas[right].column.start : width + 1) - area.column.span,
    );
    
    const rowStart = clamp(
      y - this.dy + 1,
      typeof top === 'string' ? areas[top].row.end : 1,
      (typeof bottom === 'string' ? areas[bottom].row.start : height + 1) - area.row.span,
    );
    
    if (columnStart !== area.column.start || rowStart !== area.row.start) {
      const columnEnd = columnStart + area.column.span;
      const rowEnd = rowStart + area.row.span;
      
      return setArea(draggedArea, {
        column: {
          ...area.column,
          start: columnStart,
          end: columnEnd,
        },
        row: {
          ...area.row,
          start: rowStart,
          end: rowEnd,
        },
      });
    }
  };

  moveHandler = (x, y) => {
    const {width, height, areas, setArea} = this.props;
    const {draggedPosition, draggedArea} = this.state;
    const area = areas[draggedArea];
    const adj = this.findAdjacentArea(draggedPosition, draggedArea);
    
    if (draggedPosition === 'top') {
      const start = clamp(
        y + 1,
        typeof adj === 'string' ? areas[adj].row.end : 1,
        area.row.end - 1,
      );
      
      return setArea(draggedArea, {
        ...area,
        row: {
          ...area.row,
          span: area.row.end - start,
          start,
        },
      });
    }
    
    if (draggedPosition === 'right') {
      const end = clamp(
        x + 1,
        area.column.start + 1,
        typeof adj === 'string' ? areas[adj].column.start : width + 1,
      );
      
      return setArea(draggedArea, {
        ...area,
        column: {
          ...area.column,
          span: end - area.column.start,
          end,
        },
      });
    }
    
    if (draggedPosition === 'bottom') {
      const end = clamp(
        y + 1,
        area.row.start + 1,
        typeof adj === 'string' ? areas[adj].row.start : height + 1,
      );
      
      return setArea(draggedArea, {
        ...area,
        row: {
          ...area.row,
          span: end - area.row.start,
          end,
        },
      });
    }
    
    if (draggedPosition === 'left') {
      const start = clamp(
        x + 1,
        typeof adj === 'string' ? areas[adj].column.end : 1,
        area.column.end - 1,
      );
      
      return setArea(draggedArea, {
        ...area,
        column: {
          ...area.column,
          span: area.column.end - start,
          start,
        },
      });
    }
  };
 
  findAdjacentArea = (direction, area) => {
    const {areas} = this.props;
    const {column, row} = areas[area];
    const keys = Object.keys(areas);
    
    if (direction === 'top') {
      return keys.find(key =>
        areas[key].row.end === row.start &&
        areas[key].column.start < column.end &&
        areas[key].column.end > column.start
      );
    }
    
    if (direction === 'right') {
      return keys.find(key =>
        areas[key].column.start === column.end &&
        areas[key].row.start < row.end &&
        areas[key].row.end > row.start
      );
    }
    
    if (direction === 'bottom') {
      return keys.find(key =>
        areas[key].row.start === row.end &&
        areas[key].column.start < column.end &&
        areas[key].column.end > column.start
      );
    }
    
    if (direction === 'left') {
      return keys.find(key =>
        areas[key].column.end === column.start &&
        areas[key].row.start < row.end &&
        areas[key].row.end > row.start
      );
    }
  };

  render() {
    const {tpl, width, height, areas} = this.props;
    const {isDragging, draggedArea, draggedPosition} = this.state;
    
    return (
      <StyledPreview
        innerRef={node => this.node = node}
        tpl={tpl}
        width={width}
        height={height}>
        {Object.keys(areas).map(area => (
          <Track
            key={area}
            area={area}
            column={areas[area].column}
            row={areas[area].row}
            grabbing={isDragging && draggedArea === area && typeof draggedPosition !== 'string'}
            onMouseDown={this.makeTrackMouseDown(area)}
            onHandlerMouseDown={this.makeHandlerMouseDown(area)} />
        ))}
      </StyledPreview>
    );
  }
}

class Grid extends Component {
  renderArea = area => {
    const {width, height, areas} = this.props;
    const {row, column} = areas[area];

    return Array.from(
      {length: row.span},
      (_, r) => Array.from(
        {length: column.span},
        (_, c) => (
          <StyledGridText
            key={`area${r}${c}`}
            x={`${(column.start + c - .5) / width * 100}%`}
            y={`${(row.start + r - .5) / height * 100}%`}>
            {area}
          </StyledGridText>
        ),
      ),
    );
  };
  
  renderCols = (_, index) => {
    const {width} = this.props;
    
    return (
      <StyledGridLine
        key={index}
        x1={`${(index + 1) / width * 100}%`}
        y1="0%"
        x2={`${(index + 1) / width * 100}%`}
        y2="100%" />
    );
  };
  
  renderRows = (_, index) => {
    const {height} = this.props;
    
    return (
      <StyledGridLine
        key={index}
        x1="0%"
        y1={`${(index + 1) / height * 100}%`}
        x2="100%"
        y2={`${(index + 1) / height * 100}%`} />
    );
  };
  
  render() {
    const {
      width,
      height,
      areas,
    } = this.props;
    
    return (
      <StyledGrid>
        <g>{Object.keys(areas).map(this.renderArea)}</g>
        <g>{Array.from({length: width - 1}, this.renderCols)}</g>
        <g>{Array.from({length: height - 1}, this.renderRows)}</g>
      </StyledGrid>
    );
  }
}

render(
  <App />,
  document.querySelector('#root'),
);
            
          
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