Mobile: Draw optimizations; focus handling

Widgets can now be marked for buffering their contents, which is useful if their contents change seldom but they are drawn often.

For example, the navbar is always visible but doesn't change very often, and during animations menu contents are static but there is a moving animation so everything gets drawn 60 FPS.

Focus handling was also improved so the lookup results can be scrolled while entering text, and one can tap outside an input field to unfocus it.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/ui/text.c b/src/ui/text.c
index 231281eb..f7fff4bc 100644
--- a/src/ui/text.c
+++ b/src/ui/text.c
@@ -25,6 +25,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
 #include "metrics.h"
 #include "embedded.h"
 #include "window.h"
+#include "paint.h"
 #include "app.h"
 
 #define STB_TRUETYPE_IMPLEMENTATION
@@ -1712,6 +1713,8 @@ static iRect run_Font_(iFont *d, const iRunArgs *args) {
                     }
                     SDL_Rect src;
                     memcpy(&src, &glyph->rect[hoff], sizeof(SDL_Rect));
+                    dst.x += origin_Paint.x;
+                    dst.y += origin_Paint.y;
                     if (args->mode & fillBackground_RunMode) {
                         /* Alpha blending looks much better if the RGB components don't change in
                            the partially transparent pixels. */
@@ -2182,6 +2185,8 @@ void init_TextBuf(iTextBuf *d, iWrapText *wrapText, int font, int color) {
     }
     if (d->texture) {
         SDL_Texture *oldTarget = SDL_GetRenderTarget(render);
+        const iInt2 oldOrigin = origin_Paint;
+        origin_Paint = zero_I2();
         SDL_SetRenderTarget(render, d->texture);
         SDL_SetRenderDrawBlendMode(render, SDL_BLENDMODE_NONE);
         SDL_SetRenderDrawColor(render, 255, 255, 255, 0);
@@ -2190,6 +2195,7 @@ void init_TextBuf(iTextBuf *d, iWrapText *wrapText, int font, int color) {
         draw_WrapText(wrapText, font, zero_I2(), color | fillBackground_ColorId);
         SDL_SetTextureBlendMode(text_.cache, SDL_BLENDMODE_BLEND);
         SDL_SetRenderTarget(render, oldTarget);
+        origin_Paint = oldOrigin;
         SDL_SetTextureBlendMode(d->texture, SDL_BLENDMODE_BLEND);
     }
 }
@@ -2203,6 +2209,7 @@ iTextBuf *newRange_TextBuf(int font, int color, iRangecc text) {
 }
 
 void draw_TextBuf(const iTextBuf *d, iInt2 pos, int color) {
+    addv_I2(&pos, origin_Paint);
     const iColor clr = get_Color(color);
     SDL_SetTextureColorMod(d->texture, clr.r, clr.g, clr.b);
     SDL_RenderCopy(text_.render,