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implement android.text.Layout using PangoLayout

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This is needed to have proper line wrapping in composeUI apps.

In the CTS, android.text.cts.StaticLayoutTest passes all checks now.
This commit is contained in:
Julian Winkler
2025-02-12 18:01:23 +01:00
parent 451848ae89
commit 5375f4b5fd
7 changed files with 519 additions and 28 deletions
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149
src/api-impl-jni/generated_headers/android_text_Layout.h Normal file
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/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class android_text_Layout */
#ifndef _Included_android_text_Layout
#define _Included_android_text_Layout
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: android_text_Layout
* Method: native_constructor
* Signature: (Ljava/lang/String;JI)J
*/
JNIEXPORT jlong JNICALL Java_android_text_Layout_native_1constructor
(JNIEnv *, jobject, jstring, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_set_width
* Signature: (JI)V
*/
JNIEXPORT void JNICALL Java_android_text_Layout_native_1set_1width
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_get_width
* Signature: (J)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1width
(JNIEnv *, jobject, jlong);
/*
* Class: android_text_Layout
* Method: native_get_height
* Signature: (J)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1height
(JNIEnv *, jobject, jlong);
/*
* Class: android_text_Layout
* Method: native_get_line_count
* Signature: (J)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1count
(JNIEnv *, jobject, jlong);
/*
* Class: android_text_Layout
* Method: native_get_line_top
* Signature: (JI)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1top
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_get_line_bottom
* Signature: (JI)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1bottom
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_get_line_left
* Signature: (JI)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1left
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_get_line_right
* Signature: (JI)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1right
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_get_line_width
* Signature: (JI)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1width
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_get_line_baseline
* Signature: (JI)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1baseline
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_get_line_ascent
* Signature: (JI)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1ascent
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_get_line_descent
* Signature: (JI)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1descent
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_get_line_for_vertical
* Signature: (JI)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1for_1vertical
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_set_ellipsize
* Signature: (JIF)V
*/
JNIEXPORT void JNICALL Java_android_text_Layout_native_1set_1ellipsize
(JNIEnv *, jobject, jlong, jint, jfloat);
/*
* Class: android_text_Layout
* Method: native_get_ellipsis_count
* Signature: (JI)I
*/
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1ellipsis_1count
(JNIEnv *, jobject, jlong, jint);
/*
* Class: android_text_Layout
* Method: native_draw
* Signature: (JJJ)V
*/
JNIEXPORT void JNICALL Java_android_text_Layout_native_1draw
(JNIEnv *, jobject, jlong, jlong, jlong);
#ifdef __cplusplus
}
#endif
#endif

151
src/api-impl-jni/text/android_text_Layout.c Normal file
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#include <gtk/gtk.h>
#include <pango/pango.h>
#include "../defines.h"
#include "../graphics/AndroidPaint.h"
#include "../generated_headers/android_text_Layout.h"
extern GtkWidget *window;
JNIEXPORT jlong JNICALL Java_android_text_Layout_native_1constructor(JNIEnv *env, jobject object, jstring text, jlong paint, jint width)
{
struct AndroidPaint *android_paint = _PTR(paint);
PangoLayout *layout = pango_layout_new(gtk_widget_get_pango_context(window));
pango_layout_set_font_description(layout, android_paint->font);
const char *str = (*env)->GetStringUTFChars(env, text, NULL);
pango_layout_set_text(layout, str, -1);
(*env)->ReleaseStringUTFChars(env, text, str);
pango_layout_set_width(layout, width * PANGO_SCALE);
return _INTPTR(layout);
}
JNIEXPORT void JNICALL Java_android_text_Layout_native_1set_1width(JNIEnv *env, jobject object, jlong layout, jint width)
{
PangoLayout *pango_layout = _PTR(layout);
pango_layout_set_width(pango_layout, width * PANGO_SCALE);
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1width(JNIEnv *env, jobject object, jlong layout)
{
PangoLayout *pango_layout = _PTR(layout);
return pango_layout_get_width(pango_layout) / PANGO_SCALE;
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1height(JNIEnv *env, jobject object, jlong layout)
{
PangoLayout *pango_layout = _PTR(layout);
PangoRectangle ink_rect;
PangoRectangle logical_rect;
pango_layout_get_extents(pango_layout, &ink_rect, &logical_rect);
return logical_rect.height / PANGO_SCALE;
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1count(JNIEnv *env, jobject object, jlong layout)
{
PangoLayout *pango_layout = _PTR(layout);
return pango_layout_get_line_count(pango_layout);
}
static void get_line_extends(PangoLayout *pango_layout, int line, PangoRectangle *logical_rect) {
PangoRectangle ink_rect;
PangoLayoutIter *pango_iter = pango_layout_get_iter(pango_layout);
while (line--)
pango_layout_iter_next_line(pango_iter);
pango_layout_iter_get_line_extents(pango_iter, &ink_rect, logical_rect);
pango_layout_iter_free(pango_iter);
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1top(JNIEnv *env, jobject object, jlong layout, jint line)
{
PangoRectangle logical_rect;
get_line_extends(PANGO_LAYOUT(_PTR(layout)), line, &logical_rect);
return (logical_rect.y) / PANGO_SCALE;
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1bottom(JNIEnv *env, jobject object, jlong layout, jint line)
{
PangoRectangle logical_rect;
get_line_extends(PANGO_LAYOUT(_PTR(layout)), line, &logical_rect);
return (logical_rect.y + logical_rect.height) / PANGO_SCALE;
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1left(JNIEnv *env, jobject object, jlong layout, jint line)
{
PangoRectangle logical_rect;
get_line_extends(PANGO_LAYOUT(_PTR(layout)), line, &logical_rect);
return logical_rect.x / PANGO_SCALE;
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1right(JNIEnv *env, jobject object, jlong layout, jint line)
{
PangoRectangle logical_rect;
get_line_extends(PANGO_LAYOUT(_PTR(layout)), line, &logical_rect);
return (logical_rect.x + logical_rect.width) / PANGO_SCALE;
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1width(JNIEnv *env, jobject object, jlong layout, jint line)
{
PangoRectangle logical_rect;
get_line_extends(PANGO_LAYOUT(_PTR(layout)), line, &logical_rect);
return logical_rect.width / PANGO_SCALE;
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1baseline(JNIEnv *env, jobject object, jlong layout, jint line)
{
PangoLayout *pango_layout = _PTR(layout);
PangoLayoutIter *pango_iter = pango_layout_get_iter(pango_layout);
while (line--)
pango_layout_iter_next_line(pango_iter);
return pango_layout_iter_get_baseline(pango_iter) / PANGO_SCALE;
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1ascent(JNIEnv *env, jobject object, jlong layout, jint line)
{
PangoLayout *pango_layout = _PTR(layout);
PangoLayoutLine *pango_line = pango_layout_get_line_readonly(pango_layout, line);
PangoRectangle logical_rect, ink_rect;
pango_layout_line_get_extents(pango_line, &logical_rect, &ink_rect);
return -PANGO_ASCENT(ink_rect) / PANGO_SCALE;
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1descent(JNIEnv *env, jobject object, jlong layout, jint line)
{
PangoLayout *pango_layout = _PTR(layout);
PangoLayoutLine *pango_line = pango_layout_get_line_readonly(pango_layout, line);
PangoRectangle logical_rect, ink_rect;
pango_layout_line_get_extents(pango_line, &logical_rect, &ink_rect);
return PANGO_DESCENT(ink_rect) / PANGO_SCALE;
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1line_1for_1vertical(JNIEnv *env, jobject object, jlong layout, jint y)
{
PangoLayout *pango_layout = _PTR(layout);
int index_, trailing;
pango_layout_xy_to_index(pango_layout, 0, y * PANGO_SCALE, &index_, &trailing);
int line, x_pos;
pango_layout_index_to_line_x(pango_layout, index_, trailing, &line, &x_pos);
return line;
}
JNIEXPORT void JNICALL Java_android_text_Layout_native_1set_1ellipsize(JNIEnv *env, jobject object, jlong layout, jint ellipsize_mode, jfloat ellipsize_width)
{
PangoLayout *pango_layout = _PTR(layout);
pango_layout_set_ellipsize(pango_layout, (PangoEllipsizeMode)ellipsize_mode);
pango_layout_set_width(pango_layout, ellipsize_width * PANGO_SCALE);
}
JNIEXPORT jint JNICALL Java_android_text_Layout_native_1get_1ellipsis_1count(JNIEnv *env, jobject object, jlong layout, jint line)
{
PangoLayout *pango_layout = _PTR(layout);
return pango_layout_is_ellipsized(pango_layout);
}
JNIEXPORT void JNICALL Java_android_text_Layout_native_1draw(JNIEnv *env, jobject object, jlong layout, jlong snapshot_ptr, jlong paint_ptr)
{
PangoLayout *pango_layout = PANGO_LAYOUT(_PTR(layout));
GtkSnapshot *snapshot = GTK_SNAPSHOT(_PTR(snapshot_ptr));
struct AndroidPaint *android_paint = _PTR(paint_ptr);
gtk_snapshot_append_layout(snapshot, pango_layout, &android_paint->color);
}