{"version":3,"file":"fixed-size-grid.mjs","sources":["../../../../../../../packages/components/virtual-list/src/components/fixed-size-grid.ts"],"sourcesContent":["import { isNumber, throwError } from '@element-plus/utils'\nimport createGrid from '../builders/build-grid'\n\nimport {\n AUTO_ALIGNMENT,\n CENTERED_ALIGNMENT,\n END_ALIGNMENT,\n SMART_ALIGNMENT,\n START_ALIGNMENT,\n} from '../defaults'\n\nconst SCOPE = 'ElFixedSizeGrid'\n\nconst FixedSizeGrid = createGrid({\n name: 'ElFixedSizeGrid',\n getColumnPosition: ({ columnWidth }, index) => [\n columnWidth as number,\n index * (columnWidth as number),\n ],\n\n getRowPosition: ({ rowHeight }, index) => [\n rowHeight as number,\n index * (rowHeight as number),\n ],\n\n getEstimatedTotalHeight: ({ totalRow, rowHeight }) =>\n (rowHeight as number) * totalRow,\n\n getEstimatedTotalWidth: ({ totalColumn, columnWidth }) =>\n (columnWidth as number) * totalColumn,\n\n getColumnOffset: (\n { totalColumn, columnWidth, width },\n columnIndex,\n alignment,\n scrollLeft,\n _,\n scrollBarWidth\n ) => {\n width = Number(width)\n const lastColumnOffset = Math.max(\n 0,\n totalColumn * (columnWidth as number) - width\n )\n const maxOffset = Math.min(\n lastColumnOffset,\n columnIndex * (columnWidth as number)\n )\n const minOffset = Math.max(\n 0,\n columnIndex * (columnWidth as number) -\n width +\n scrollBarWidth +\n (columnWidth as number)\n )\n\n if (alignment === 'smart') {\n if (scrollLeft >= minOffset - width && scrollLeft <= maxOffset + width) {\n alignment = AUTO_ALIGNMENT\n } else {\n alignment = CENTERED_ALIGNMENT\n }\n }\n\n switch (alignment) {\n case START_ALIGNMENT:\n return maxOffset\n case END_ALIGNMENT:\n return minOffset\n case CENTERED_ALIGNMENT: {\n const middleOffset = Math.round(minOffset + (maxOffset - minOffset) / 2)\n if (middleOffset < Math.ceil(width / 2)) {\n return 0\n } else if (middleOffset > lastColumnOffset + Math.floor(width / 2)) {\n return lastColumnOffset\n } else {\n return middleOffset\n }\n }\n case AUTO_ALIGNMENT:\n default:\n if (scrollLeft >= minOffset && scrollLeft <= maxOffset) {\n return scrollLeft\n } else if (minOffset > maxOffset) {\n return minOffset\n } else if (scrollLeft < minOffset) {\n return minOffset\n } else {\n return maxOffset\n }\n }\n },\n\n getRowOffset: (\n { rowHeight, height, totalRow },\n rowIndex,\n align,\n scrollTop,\n _,\n scrollBarWidth\n ): number => {\n height = Number(height)\n const lastRowOffset = Math.max(0, totalRow * (rowHeight as number) - height)\n const maxOffset = Math.min(lastRowOffset, rowIndex * (rowHeight as number))\n const minOffset = Math.max(\n 0,\n rowIndex * (rowHeight as number) -\n height +\n scrollBarWidth +\n (rowHeight as number)\n )\n\n if (align === SMART_ALIGNMENT) {\n if (scrollTop >= minOffset - height && scrollTop <= maxOffset + height) {\n align = AUTO_ALIGNMENT\n } else {\n align = CENTERED_ALIGNMENT\n }\n }\n\n switch (align) {\n case START_ALIGNMENT:\n return maxOffset\n case END_ALIGNMENT:\n return minOffset\n case CENTERED_ALIGNMENT: {\n const middleOffset = Math.round(minOffset + (maxOffset - minOffset) / 2)\n if (middleOffset < Math.ceil(height / 2)) {\n return 0\n } else if (middleOffset > lastRowOffset + Math.floor(height / 2)) {\n return lastRowOffset\n } else {\n return middleOffset\n }\n }\n case AUTO_ALIGNMENT:\n default:\n if (scrollTop >= minOffset && scrollTop <= maxOffset) {\n return scrollTop\n } else if (minOffset > maxOffset) {\n return minOffset\n } else if (scrollTop < minOffset) {\n return minOffset\n } else {\n return maxOffset\n }\n }\n },\n\n getColumnStartIndexForOffset: ({ columnWidth, totalColumn }, scrollLeft) =>\n Math.max(\n 0,\n Math.min(\n totalColumn - 1,\n Math.floor(scrollLeft / (columnWidth as number))\n )\n ),\n\n getColumnStopIndexForStartIndex: (\n { columnWidth, totalColumn, width },\n startIndex: number,\n scrollLeft: number\n ): number => {\n const left = startIndex * (columnWidth as number)\n const visibleColumnsCount = Math.ceil(\n ((width as number) + scrollLeft - left) / (columnWidth as number)\n )\n return Math.max(\n 0,\n Math.min(totalColumn - 1, startIndex + visibleColumnsCount - 1)\n )\n },\n\n getRowStartIndexForOffset: (\n { rowHeight, totalRow },\n scrollTop: number\n ): number =>\n Math.max(\n 0,\n Math.min(totalRow - 1, Math.floor(scrollTop / (rowHeight as number)))\n ),\n\n getRowStopIndexForStartIndex: (\n { rowHeight, totalRow, height },\n startIndex: number,\n scrollTop: number\n ): number => {\n const top = startIndex * (rowHeight as number)\n const numVisibleRows = Math.ceil(\n ((height as number) + scrollTop - top) / (rowHeight as number)\n )\n return Math.max(\n 0,\n Math.min(\n totalRow - 1,\n startIndex + numVisibleRows - 1 // -1 is because stop index is inclusive\n )\n )\n },\n /**\n * Fixed size grid does not need this cache\n * Using any to bypass it, TODO: Using type inference to fix this.\n */\n initCache: () => undefined as any,\n\n clearCache: true,\n\n validateProps: ({ columnWidth, rowHeight }) => {\n if (process.env.NODE_ENV !== 'production') {\n if (!isNumber(columnWidth)) {\n throwError(\n SCOPE,\n `\n \"columnWidth\" must be passed as number,\n instead ${typeof columnWidth} was given.\n `\n )\n }\n\n if (!isNumber(rowHeight)) {\n throwError(\n SCOPE,\n `\n \"columnWidth\" must be passed as number,\n instead ${typeof rowHeight} was given.\n `\n )\n }\n }\n },\n})\n\nexport default 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