X-Git-Url: https://git.josue.xyz/?p=VSoRC%2F.git;a=blobdiff_plain;f=node_modules%2Fxterm%2Fsrc%2Fcommon%2Fbuffer%2FBufferReflow.ts;fp=node_modules%2Fxterm%2Fsrc%2Fcommon%2Fbuffer%2FBufferReflow.ts;h=ece9a96ed19c502cd28d2b16d5b49d4e534f7797;hp=0000000000000000000000000000000000000000;hb=4339da12467b75fb8b6ca831f4bf0081c485ed2c;hpb=af450fde25a9ccf4767b29254c463ffb8ef25237

diff --git a/node_modules/xterm/src/common/buffer/BufferReflow.ts b/node_modules/xterm/src/common/buffer/BufferReflow.ts
new file mode 100644
index 0000000..ece9a96
--- /dev/null
+++ b/node_modules/xterm/src/common/buffer/BufferReflow.ts
@@ -0,0 +1,220 @@
+/**
+ * Copyright (c) 2019 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { BufferLine } from 'common/buffer/BufferLine';
+import { CircularList } from 'common/CircularList';
+import { IBufferLine, ICellData } from 'common/Types';
+
+export interface INewLayoutResult {
+  layout: number[];
+  countRemoved: number;
+}
+
+/**
+ * Evaluates and returns indexes to be removed after a reflow larger occurs. Lines will be removed
+ * when a wrapped line unwraps.
+ * @param lines The buffer lines.
+ * @param newCols The columns after resize.
+ */
+export function reflowLargerGetLinesToRemove(lines: CircularList<IBufferLine>, oldCols: number, newCols: number, bufferAbsoluteY: number, nullCell: ICellData): number[] {
+  // Gather all BufferLines that need to be removed from the Buffer here so that they can be
+  // batched up and only committed once
+  const toRemove: number[] = [];
+
+  for (let y = 0; y < lines.length - 1; y++) {
+    // Check if this row is wrapped
+    let i = y;
+    let nextLine = lines.get(++i) as BufferLine;
+    if (!nextLine.isWrapped) {
+      continue;
+    }
+
+    // Check how many lines it's wrapped for
+    const wrappedLines: BufferLine[] = [lines.get(y) as BufferLine];
+    while (i < lines.length && nextLine.isWrapped) {
+      wrappedLines.push(nextLine);
+      nextLine = lines.get(++i) as BufferLine;
+    }
+
+    // If these lines contain the cursor don't touch them, the program will handle fixing up wrapped
+    // lines with the cursor
+    if (bufferAbsoluteY >= y && bufferAbsoluteY < i) {
+      y += wrappedLines.length - 1;
+      continue;
+    }
+
+    // Copy buffer data to new locations
+    let destLineIndex = 0;
+    let destCol = getWrappedLineTrimmedLength(wrappedLines, destLineIndex, oldCols);
+    let srcLineIndex = 1;
+    let srcCol = 0;
+    while (srcLineIndex < wrappedLines.length) {
+      const srcTrimmedTineLength = getWrappedLineTrimmedLength(wrappedLines, srcLineIndex, oldCols);
+      const srcRemainingCells = srcTrimmedTineLength - srcCol;
+      const destRemainingCells = newCols - destCol;
+      const cellsToCopy = Math.min(srcRemainingCells, destRemainingCells);
+
+      wrappedLines[destLineIndex].copyCellsFrom(wrappedLines[srcLineIndex], srcCol, destCol, cellsToCopy, false);
+
+      destCol += cellsToCopy;
+      if (destCol === newCols) {
+        destLineIndex++;
+        destCol = 0;
+      }
+      srcCol += cellsToCopy;
+      if (srcCol === srcTrimmedTineLength) {
+        srcLineIndex++;
+        srcCol = 0;
+      }
+
+      // Make sure the last cell isn't wide, if it is copy it to the current dest
+      if (destCol === 0 && destLineIndex !== 0) {
+        if (wrappedLines[destLineIndex - 1].getWidth(newCols - 1) === 2) {
+          wrappedLines[destLineIndex].copyCellsFrom(wrappedLines[destLineIndex - 1], newCols - 1, destCol++, 1, false);
+          // Null out the end of the last row
+          wrappedLines[destLineIndex - 1].setCell(newCols - 1, nullCell);
+        }
+      }
+    }
+
+    // Clear out remaining cells or fragments could remain;
+    wrappedLines[destLineIndex].replaceCells(destCol, newCols, nullCell);
+
+    // Work backwards and remove any rows at the end that only contain null cells
+    let countToRemove = 0;
+    for (let i = wrappedLines.length - 1; i > 0; i--) {
+      if (i > destLineIndex || wrappedLines[i].getTrimmedLength() === 0) {
+        countToRemove++;
+      } else {
+        break;
+      }
+    }
+
+    if (countToRemove > 0) {
+      toRemove.push(y + wrappedLines.length - countToRemove); // index
+      toRemove.push(countToRemove);
+    }
+
+    y += wrappedLines.length - 1;
+  }
+  return toRemove;
+}
+
+/**
+ * Creates and return the new layout for lines given an array of indexes to be removed.
+ * @param lines The buffer lines.
+ * @param toRemove The indexes to remove.
+ */
+export function reflowLargerCreateNewLayout(lines: CircularList<IBufferLine>, toRemove: number[]): INewLayoutResult {
+  const layout: number[] = [];
+  // First iterate through the list and get the actual indexes to use for rows
+  let nextToRemoveIndex = 0;
+  let nextToRemoveStart = toRemove[nextToRemoveIndex];
+  let countRemovedSoFar = 0;
+  for (let i = 0; i < lines.length; i++) {
+    if (nextToRemoveStart === i) {
+      const countToRemove = toRemove[++nextToRemoveIndex];
+
+      // Tell markers that there was a deletion
+      lines.onDeleteEmitter.fire({
+        index: i - countRemovedSoFar,
+        amount: countToRemove
+      });
+
+      i += countToRemove - 1;
+      countRemovedSoFar += countToRemove;
+      nextToRemoveStart = toRemove[++nextToRemoveIndex];
+    } else {
+      layout.push(i);
+    }
+  }
+  return {
+    layout,
+    countRemoved: countRemovedSoFar
+  };
+}
+
+/**
+ * Applies a new layout to the buffer. This essentially does the same as many splice calls but it's
+ * done all at once in a single iteration through the list since splice is very expensive.
+ * @param lines The buffer lines.
+ * @param newLayout The new layout to apply.
+ */
+export function reflowLargerApplyNewLayout(lines: CircularList<IBufferLine>, newLayout: number[]): void {
+  // Record original lines so they don't get overridden when we rearrange the list
+  const newLayoutLines: BufferLine[] = [];
+  for (let i = 0; i < newLayout.length; i++) {
+    newLayoutLines.push(lines.get(newLayout[i]) as BufferLine);
+  }
+
+  // Rearrange the list
+  for (let i = 0; i < newLayoutLines.length; i++) {
+    lines.set(i, newLayoutLines[i]);
+  }
+  lines.length = newLayout.length;
+}
+
+/**
+ * Gets the new line lengths for a given wrapped line. The purpose of this function it to pre-
+ * compute the wrapping points since wide characters may need to be wrapped onto the following line.
+ * This function will return an array of numbers of where each line wraps to, the resulting array
+ * will only contain the values `newCols` (when the line does not end with a wide character) and
+ * `newCols - 1` (when the line does end with a wide character), except for the last value which
+ * will contain the remaining items to fill the line.
+ *
+ * Calling this with a `newCols` value of `1` will lock up.
+ *
+ * @param wrappedLines The wrapped lines to evaluate.
+ * @param oldCols The columns before resize.
+ * @param newCols The columns after resize.
+ */
+export function reflowSmallerGetNewLineLengths(wrappedLines: BufferLine[], oldCols: number, newCols: number): number[] {
+  const newLineLengths: number[] = [];
+  const cellsNeeded = wrappedLines.map((l, i) => getWrappedLineTrimmedLength(wrappedLines, i, oldCols)).reduce((p, c) => p + c);
+
+  // Use srcCol and srcLine to find the new wrapping point, use that to get the cellsAvailable and
+  // linesNeeded
+  let srcCol = 0;
+  let srcLine = 0;
+  let cellsAvailable = 0;
+  while (cellsAvailable < cellsNeeded) {
+    if (cellsNeeded - cellsAvailable < newCols) {
+      // Add the final line and exit the loop
+      newLineLengths.push(cellsNeeded - cellsAvailable);
+      break;
+    }
+    srcCol += newCols;
+    const oldTrimmedLength = getWrappedLineTrimmedLength(wrappedLines, srcLine, oldCols);
+    if (srcCol > oldTrimmedLength) {
+      srcCol -= oldTrimmedLength;
+      srcLine++;
+    }
+    const endsWithWide = wrappedLines[srcLine].getWidth(srcCol - 1) === 2;
+    if (endsWithWide) {
+      srcCol--;
+    }
+    const lineLength = endsWithWide ? newCols - 1 : newCols;
+    newLineLengths.push(lineLength);
+    cellsAvailable += lineLength;
+  }
+
+  return newLineLengths;
+}
+
+export function getWrappedLineTrimmedLength(lines: BufferLine[], i: number, cols: number): number {
+  // If this is the last row in the wrapped line, get the actual trimmed length
+  if (i === lines.length - 1) {
+    return lines[i].getTrimmedLength();
+  }
+  // Detect whether the following line starts with a wide character and the end of the current line
+  // is null, if so then we can be pretty sure the null character should be excluded from the line
+  // length]
+  const endsInNull = !(lines[i].hasContent(cols - 1)) && lines[i].getWidth(cols - 1) === 1;
+  const followingLineStartsWithWide = lines[i + 1].getWidth(0) === 2;
+  if (endsInNull && followingLineStartsWithWide) {
+    return cols - 1;
+  }
+  return cols;
+}