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LibGUI: Let cursor start a wrapped line

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In line wrapping mode, the same column refers both to the end of a
visual line and the beginning of the subsequent visual line. This
meant that the cursor couldn't move to the beginning of a visual
line. Now, we only let the cursor go to the end of a physical line,
not the visual line.

Closes #4786
This commit is contained in:
Angus Gibson 2021-02-23 12:34:26 +11:00 committed by Andreas Kling
parent ae51dea524
commit 0c44deeee2
Notes: sideshowbarker 2024-07-18 21:56:45 +09:00 
Author: https://github.com/angus-g
Commit: https://github.com/SerenityOS/serenity/commit/0c44deeee2a
Pull-request: https://github.com/SerenityOS/serenity/pull/5482
Issue: https://github.com/SerenityOS/serenity/issues/4786
1 changed files with 6 additions and 4 deletions
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10
Userland/Libraries/LibGUI/TextEditor.cpp
View File

@ -857,9 +857,10 @@ int TextEditor::content_x_for_position(const TextPosition& position) const
int x_offset = 0;
switch (m_text_alignment) {
case Gfx::TextAlignment::CenterLeft:
for_each_visual_line(position.line(), [&](const Gfx::IntRect&, auto& visual_line_view, size_t start_of_visual_line, [[maybe_unused]] bool is_last_visual_line) {
for_each_visual_line(position.line(), [&](const Gfx::IntRect&, auto& visual_line_view, size_t start_of_visual_line, bool is_last_visual_line) {
size_t offset_in_visual_line = position.column() - start_of_visual_line;
if (position.column() >= start_of_visual_line && (offset_in_visual_line <= visual_line_view.length())) {
auto before_line_end = is_last_visual_line ? (offset_in_visual_line <= visual_line_view.length()) : (offset_in_visual_line < visual_line_view.length());
if (position.column() >= start_of_visual_line && before_line_end) {
if (offset_in_visual_line == 0) {
x_offset = 0;
} else {
@ -896,8 +897,9 @@ Gfx::IntRect TextEditor::content_rect_for_position(const TextPosition& position)
}
Gfx::IntRect rect;
for_each_visual_line(position.line(), [&](const Gfx::IntRect& visual_line_rect, auto& view, size_t start_of_visual_line, [[maybe_unused]] bool is_last_visual_line) {
if (position.column() >= start_of_visual_line && ((position.column() - start_of_visual_line) <= view.length())) {
for_each_visual_line(position.line(), [&](const Gfx::IntRect& visual_line_rect, auto& view, size_t start_of_visual_line, bool is_last_visual_line) {
auto before_line_end = is_last_visual_line ? ((position.column() - start_of_visual_line) <= view.length()) : ((position.column() - start_of_visual_line) < view.length());
if (position.column() >= start_of_visual_line && before_line_end) {
// NOTE: We have to subtract the horizontal padding here since it's part of the visual line rect
// *and* included in what we get from content_x_for_position().
rect = {