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terminal: resize no reflow must do cols before rows

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This commit is contained in:
Mitchell Hashimoto
2024-03-17 22:00:15 -07:00
parent 7e010caea1
commit e7a2a9bcd1
1 changed files with 59 additions and 52 deletions
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111
src/terminal/PageList.zig
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@ -1191,6 +1191,62 @@ fn resizeWithoutReflow(self: *PageList, opts: Resize) !void {
) else old_min_max_size;
errdefer self.min_max_size = old_min_max_size;
// Important! We have to do cols first because cols may cause us to
// destroy pages if we're increasing cols which will free up page_size
// so that when we call grow() in the row mods, we won't prune.
if (opts.cols) |cols| {
switch (std.math.order(cols, self.cols)) {
.eq => {},
// Making our columns smaller. We always have space for this
// in existing pages so we need to go through the pages,
// resize the columns, and clear any cells that are beyond
// the new size.
.lt => {
var it = self.pageIterator(.right_down, .{ .screen = .{} }, null);
while (it.next()) |chunk| {
const page = &chunk.page.data;
const rows = page.rows.ptr(page.memory);
for (0..page.size.rows) |i| {
const row = &rows[i];
page.clearCells(row, cols, self.cols);
}
page.size.cols = cols;
}
// Update all our tracked pins. If they have an X
// beyond the edge, clamp it.
var pin_it = self.tracked_pins.keyIterator();
while (pin_it.next()) |p_ptr| {
const p = p_ptr.*;
if (p.x >= cols) p.x = cols - 1;
}
self.cols = cols;
},
// Make our columns larger. This is a bit more complicated because
// pages may not have the capacity for this. If they don't have
// the capacity we need to allocate a new page and copy the data.
.gt => {
// See the comment in the while loop when setting self.cols
const old_cols = self.cols;
var it = self.pageIterator(.right_down, .{ .screen = .{} }, null);
while (it.next()) |chunk| {
// We need to restore our old cols after we resize because
// we have an assertion on this and we want to be able to
// call this method multiple times.
self.cols = old_cols;
try self.resizeWithoutReflowGrowCols(cols, chunk);
}
self.cols = cols;
},
}
}
if (opts.rows) |rows| {
switch (std.math.order(rows, self.rows)) {
.eq => {},
@ -1252,58 +1308,9 @@ fn resizeWithoutReflow(self: *PageList, opts: Resize) !void {
self.rows = rows;
},
}
}
if (opts.cols) |cols| {
switch (std.math.order(cols, self.cols)) {
.eq => {},
// Making our columns smaller. We always have space for this
// in existing pages so we need to go through the pages,
// resize the columns, and clear any cells that are beyond
// the new size.
.lt => {
var it = self.pageIterator(.right_down, .{ .screen = .{} }, null);
while (it.next()) |chunk| {
const page = &chunk.page.data;
const rows = page.rows.ptr(page.memory);
for (0..page.size.rows) |i| {
const row = &rows[i];
page.clearCells(row, cols, self.cols);
}
page.size.cols = cols;
}
// Update all our tracked pins. If they have an X
// beyond the edge, clamp it.
var pin_it = self.tracked_pins.keyIterator();
while (pin_it.next()) |p_ptr| {
const p = p_ptr.*;
if (p.x >= cols) p.x = cols - 1;
}
self.cols = cols;
},
// Make our columns larger. This is a bit more complicated because
// pages may not have the capacity for this. If they don't have
// the capacity we need to allocate a new page and copy the data.
.gt => {
// See the comment in the while loop when setting self.cols
const old_cols = self.cols;
var it = self.pageIterator(.right_down, .{ .screen = .{} }, null);
while (it.next()) |chunk| {
// We need to restore our old cols after we resize because
// we have an assertion on this and we want to be able to
// call this method multiple times.
self.cols = old_cols;
try self.resizeWithoutReflowGrowCols(cols, chunk);
}
self.cols = cols;
},
if (comptime std.debug.runtime_safety) {
assert(self.totalRows() >= self.rows);
}
}
}
@ -4616,7 +4623,7 @@ test "PageList resize (no reflow) more rows and less cols" {
}
}
test "PageList resize (no reflow) more rows and cols" {
test "PageList resize more rows and cols doesn't fit in single std page" {
const testing = std.testing;
const alloc = testing.allocator;