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Step 93: LSP hover and signature help

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Bill
2026-02-09 10:02:03 -07:00
parent 0916026448
commit ede4166af3
5 changed files with 201 additions and 18 deletions
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50
editor/src/main.cpp
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@@ -91,6 +91,9 @@ struct EditorState {
bool completionVisible = false;
int completionSelected = 0;
double completionLastChange = 0.0;
bool hoverPending = false;
double hoverLastMove = 0.0;
ImVec2 hoverLastMouse = ImVec2(-1.0f, -1.0f);
BufferState* active() { return activeBuffer; }
@@ -1016,6 +1019,17 @@ int main(int, char**) {
state.completionVisible = false;
state.completionSelected = 0;
if (state.lsp) state.lsp->clearCompletionItems();
if (state.lsp && state.active() && state.active()->path.rfind("(untitled", 0) != 0) {
int cursor = state.active()->widget.getCursor();
if (cursor > 0 && state.active()->editBuf[cursor - 1] == '(') {
int lineZero = std::max(0, state.active()->cursorLine - 1);
int colZero = std::max(0, state.active()->cursorCol - 1);
state.lsp->requestSignatureHelp(EditorState::toFileUri(state.active()->path),
lineZero, colZero);
} else if (cursor > 0 && state.active()->editBuf[cursor - 1] == ')') {
state.lsp->clearSignatureHelp();
}
}
}
double now = ImGui::GetTime();
@@ -1083,6 +1097,42 @@ int main(int, char**) {
}
}
if (state.lsp && state.active()) {
if (ImGui::IsWindowHovered()) {
ImVec2 mouse = ImGui::GetMousePos();
if (mouse.x != state.hoverLastMouse.x || mouse.y != state.hoverLastMouse.y) {
state.hoverLastMouse = mouse;
state.hoverLastMove = ImGui::GetTime();
state.hoverPending = true;
state.lsp->clearHover();
}
if (state.hoverPending && (ImGui::GetTime() - state.hoverLastMove) > 0.5) {
if (state.active()->path.rfind("(untitled", 0) != 0) {
int lineZero = std::max(0, state.active()->cursorLine - 1);
int colZero = std::max(0, state.active()->cursorCol - 1);
state.lsp->requestHover(EditorState::toFileUri(state.active()->path),
lineZero, colZero);
}
state.hoverPending = false;
}
std::string hover = state.lsp->getHoverContents();
if (!hover.empty()) {
ImGui::BeginTooltip();
ImGui::TextUnformatted(hover.c_str());
ImGui::EndTooltip();
}
}
auto sig = state.lsp->getSignatureHelp();
if (!sig.label.empty()) {
ImGui::SetCursorScreenPos(ImVec2(ImGui::GetWindowPos().x + 20.0f,
ImGui::GetWindowPos().y + ImGui::GetWindowHeight() - 80.0f));
ImGui::BeginChild("##signatureHelp", ImVec2(420, 60), true);
ImGui::TextUnformatted(sig.label.c_str());
ImGui::EndChild();
}
}
ImGui::EndTabItem();
}
if (!open) {